Live/247 Rank/New Hampshire

New Hampshire 24/7 Rank

Every station in New Hampshire ranked by its 247 score out of 100: how reliably it reports, how accurate its readings are against a reference station, how they pass their checks and how they stand against the forecast, over the last seven days.

292 stations ranked38.0% sent every report dueranked October 4, 2026page 1 of 2New Hampshire instrumentsNew Hampshire weather

A station is ranked once its week holds enough reports to measure: 12, or 3 days for a gauge that reports once a day. Of the 292 ranked here, 290 have a page of their own; the rest are platforms heard here that have not yet reported enough to be listed.

Every ranked station, first to last

1stLast

Each rank wears its colour: first in its state in bright green, last in deep red, and every rank between mixed along the band.

How they reported this week

The days behind it

7 days30 days 90 days

every report90 to 99%under 90%

Every station, ranked

Rank	Station	Score	Network	County	Received	Reports	Arrives in	Longest silence
1	Rochester (Was 6B1)DAW	99.6	Airport	York	98.8%	166 of 168	8 min	2 h
2	Nashua/Boire FieldASH	99.5	Airport	Hillsborough	100%	168 of 168	12 min	67 min
3	LaconiaLCI	99.3	Airport	Belknap	100%	168 of 168	12 min	67 min
4	New LondonNLNN3	99.0	Cooperative	Merrimack	100%	7 of 7	3 min	24 h
5	Winnipesaukee River At Lakeport 2LKPN3	99.0	Cooperative	Belknap	100%	7 of 7	13 min	27 h
6	North ConwayNCON3	99.0	Cooperative	Carroll	100%	7 of 7	18 min	24.7 h
7	EppingEPPN3	99.0	Cooperative	Rockingham	100%	7 of 7	53 min	24 h
8	NorthumberlandNUMN3	99.0	Cooperative	Coos	100%	7 of 7	53 min	24.9 h
9	Bretton Woods 3SECAWN3	99.0	Cooperative	Coos	100%	7 of 7	73 min	24.1 h
10	East SandwichESDN3	99.0	Cooperative	Carroll	100%	7 of 7	1.5 h	24 h
10	KeeneKEEN3	99.0	Cooperative	Cheshire	100%	7 of 7	1.5 h	24 h
12	Randpolph - Gray KnobGKBN3	99.0	Cooperative	Coos	100%	7 of 7	1.5 h	24.3 h
13	East MilfordEMLN3	99.0	Cooperative	Hillsborough	100%	7 of 7	1.5 h	24 h
14	SOUN3SOUN3	99.0	DCP	-	100%	7 of 7	1.9 h	24 h
15	First Connecticut LakeFCLN3	99.0	Cooperative	Coos	100%	7 of 7	2.2 h	24 h
15	Gorham AirportGHNN3	99.0	Cooperative	Coos	100%	7 of 7	2.2 h	24 h
15	LincolnLICN3	99.0	Cooperative	Grafton	100%	7 of 7	2.2 h	24 h
15	OUTSIDE & NW OF P.O @ PENNACOOK NHSLSN3	99.0	Cooperative	Merrimack	100%	7 of 7	2.2 h	24 h
19	New London 0.8 SNH-MR-70	99.0	Volunteer	Merrimack	100%	3 of 3	26 min	24 h
20	Brookfield 0.9 WSWNH-CR-3	99.0	Volunteer	Carroll	100%	3 of 3	26 min	26 h
21	Center Sandwich 4.9 ENH-CR-26	99.0	Volunteer	Carroll	100%	3 of 3	26 min	24 h
21	Thornton 4.1 ENENH-GR-77	99.0	Volunteer	Grafton	100%	3 of 3	26 min	24 h
21	Antrim 4.1 NWNH-HL-108	99.0	Volunteer	Hillsborough	100%	3 of 3	26 min	24 h
21	Chichester 2.7 SSWNH-MR-25	99.0	Volunteer	Merrimack	100%	3 of 3	26 min	24 h
21	Concord 3.8 SSENH-MR-9	99.0	Volunteer	Merrimack	100%	3 of 3	26 min	24 h
21	Hampton Falls 1.8 NWNH-RC-89	99.0	Volunteer	Rockingham	100%	3 of 3	26 min	24 h
27	Hanover 5.2 NENH-GR-59	99.0	Volunteer	Grafton	100%	3 of 3	26 min	24 h
28	Bristol 1.7 NNH-GR-79	99.0	Volunteer	Grafton	100%	3 of 3	26 min	24 h
28	Dunbarton 1.1 SNH-MR-77	99.0	Volunteer	Merrimack	100%	3 of 3	26 min	24 h
30	Northfield 2.8 ENH-MR-45	99.0	Volunteer	Merrimack	100%	3 of 3	26 min	25 h
31	South Sutton 1.3 SENH-MR-60	99.0	Volunteer	Merrimack	100%	3 of 3	85 min	24 h
32	Lancaster 0.5 NNH-CS-7	99.0	Volunteer	Coos	100%	3 of 3	86 min	24 h
33	Nottingham 0.9 SSWNH-RC-95	99.0	Volunteer	Rockingham	100%	3 of 3	86 min	25 h
34	Manchester 0.6 SNH-HL-96	99.0	Volunteer	Hillsborough	100%	3 of 3	86 min	26 h
35	Canterbury 2.5 SSWNH-MR-55	99.0	Volunteer	Merrimack	100%	3 of 3	86 min	2 days
36	Laconia 2.8 SNH-BK-10	99.0	Volunteer	Belknap	100%	3 of 3	86 min	25 h
36	Barrington 3.2 ENH-ST-40	99.0	Volunteer	Strafford	100%	3 of 3	86 min	25 h
38	New Hampton 4.1 NNH-BK-18	99.0	Volunteer	Belknap	100%	3 of 3	86 min	24 h
38	Meredith 2.9 SSWNH-BK-9	99.0	Volunteer	Belknap	100%	3 of 3	86 min	24 h
38	Keene 2.0 SENH-CH-21	99.0	Volunteer	Cheshire	100%	3 of 3	86 min	24 h
38	Carroll 4.6 NENH-CS-19	99.0	Volunteer	Coos	100%	3 of 3	86 min	24 h
38	Greenville 1.1 ENENH-HL-48	99.0	Volunteer	Hillsborough	100%	3 of 3	86 min	24 h
43	Ashland 2.4 NNWNH-GR-46	99.0	Volunteer	Grafton	100%	3 of 3	86 min	25 h
43	Bow 1.6 NWNH-MR-4	99.0	Volunteer	Merrimack	100%	3 of 3	86 min	25 h
43	Contoocook 0.6 NWNH-MR-68	99.0	Volunteer	Merrimack	100%	3 of 3	86 min	25 h
46	Tilton Northfield 3.3 NENH-BK-1	99.0	Volunteer	Belknap	100%	3 of 3	86 min	24 h
46	Hinsdale 2.5 NNWNH-CH-31	99.0	Volunteer	Cheshire	100%	3 of 3	86 min	24 h
46	Brookline 2.3 SWNH-HL-100	99.0	Volunteer	Hillsborough	100%	3 of 3	86 min	24 h
46	Epsom 3.2 SSWNH-MR-65	99.0	Volunteer	Merrimack	100%	3 of 3	86 min	24 h
46	Nottingham 1.2 SNH-RC-79	99.0	Volunteer	Rockingham	100%	3 of 3	86 min	24 h
46	North Hampton 1.4 ESENH-RC-84	99.0	Volunteer	Rockingham	100%	3 of 3	86 min	24 h
52	Hooksett 5.3 SSENH-MR-86	99.0	Volunteer	Merrimack	100%	3 of 3	86 min	25 h
53	West Chesterfield 0.3 WNWNH-CH-2	99.0	Volunteer	Cheshire	100%	3 of 3	86 min	2 days
54	Rochester 3.4 ENENH-ST-55	99.0	Volunteer	Strafford	100%	3 of 3	86 min	24 h
55	Walpole 5.3 SENH-CH-33	99.0	Volunteer	Cheshire	100%	3 of 3	86 min	25 h
56	Stratham 1.9 ESENH-RC-24	99.0	Volunteer	Rockingham	100%	3 of 3	86 min	25 h
57	Temple 1.2 ENENH-HL-103	99.0	Volunteer	Hillsborough	100%	3 of 3	86 min	24 h
57	Exeter 0.8 SWNH-RC-3	99.0	Volunteer	Rockingham	100%	3 of 3	86 min	24 h
59	Strafford 2.9 NNH-ST-31	99.0	Volunteer	Strafford	100%	3 of 3	86 min	25 h
60	Bristol 0.4 SSENH-GR-1	98.9	Volunteer	Grafton	100%	3 of 3	2.4 h	24 h
60	Sutton Mills 0.1 ENENH-MR-63	98.9	Volunteer	Merrimack	100%	3 of 3	2.4 h	24 h
60	Barrington 3.7 WNH-ST-49	98.9	Volunteer	Strafford	100%	3 of 3	2.4 h	24 h
63	Chichester 1.2 WNH-MR-76	98.9	Volunteer	Merrimack	100%	3 of 3	2.4 h	25 h
64	Mont Vernon 1.3 SSWNH-HL-49	98.9	Volunteer	Hillsborough	100%	3 of 3	2.4 h	24 h
65	Keene 1.3 SWNH-CH-27	98.9	Volunteer	Cheshire	100%	3 of 3	2.4 h	24 h
65	Littleton 7.3 WNH-GR-47	98.9	Volunteer	Grafton	100%	3 of 3	2.4 h	24 h
65	Dunbarton 3.8 SENH-MR-47	98.9	Volunteer	Merrimack	100%	3 of 3	2.4 h	24 h
65	Seabrook 0.5 NNH-RC-106	98.9	Volunteer	Rockingham	100%	3 of 3	2.4 h	24 h
65	Cornish 1.1 ENENH-SL-15	98.9	Volunteer	Sullivan	100%	3 of 3	2.4 h	24 h
70	Keene 1.9 SENH-CH-26	98.9	Volunteer	Cheshire	100%	3 of 3	2.4 h	24 h
70	Wolfeboro 1.5 SENH-CR-50	98.9	Volunteer	Carroll	100%	3 of 3	2.4 h	24 h
70	Brookline 2.3 SWNH-HL-19	98.9	Volunteer	Hillsborough	100%	3 of 3	2.4 h	24 h
73	North Conway 1.8 SSENH-CR-46	98.9	Volunteer	Carroll	100%	3 of 3	2.4 h	26 h
74	Northfield 3.1 SWNH-MR-80	98.9	Volunteer	Merrimack	100%	3 of 3	2.4 h	24 h
75	Pease AFB/PortsmoutPSM	98.8	Airport	York	98.8%	166 of 168	14 min	2 h
76	Jaffrey AirparkJAPN3	98.7	Cooperative	Cheshire	100%	7 of 7	2.9 h	24 h
77	White Mountain Nf Near ConwayCWYN3	98.6	Gauge	Carroll	100%	168 of 168	12 min	60 min
78	Auburn 0.1 SENH-RC-108	98.5	Volunteer	Rockingham	100%	3 of 3	3.4 h	24 h
79	Rollinsford 2.0 WSWNH-ST-37	98.5	Volunteer	Strafford	100%	3 of 3	3.4 h	24 h
80	Rindge 3.2 ESENH-CH-20	98.5	Volunteer	Cheshire	100%	3 of 3	3.4 h	25 h
81	Epping 2.0 NNENH-RC-101	98.5	Volunteer	Rockingham	100%	3 of 3	3.4 h	24 h
82	West Unity 0.7 WSWNH-SL-3	98.5	Volunteer	Sullivan	100%	3 of 3	3.4 h	24 h
83	Epsom - Northwood LakeNWLN3	98.3	Gauge	Merrimack	98.8%	166 of 168	10 min	3.3 h
84	Manchester AirparkMHT	98.3	Airport	Rockingham	98.2%	165 of 168	6 min	2 h
85	Shannon BrookSHAN3	98.3	Gauge	Carroll	98.2%	165 of 168	10 min	1.8 h
86	Bearcamp River 1 E South TamworthBCPN3	98.0	Gauge	Carroll	100%	168 of 168	15 min	63 min
86	Lake SunapeeLKSN3	98.0	Gauge	Sullivan	100%	168 of 168	15 min	63 min
86	Mascoma River At West CanaanWCNN3	98.0	Gauge	Grafton	100%	168 of 168	15 min	63 min
86	Lake Winnipesaukee At Weirs BeachWEIN3	98.0	Gauge	Belknap	100%	168 of 168	15 min	63 min
90	Waterville ValleyWVVN3	98.0	Gauge	Grafton	100%	168 of 168	15 min	73 min
91	SandownSANN3	98.0	Gauge	Rockingham	100%	168 of 168	15 min	75 min
92	Keene 2.5 NNWNH-CH-24	98.0	Volunteer	Cheshire	100%	3 of 3	4.4 h	24 h
93	Laconia 2.8 SSENH-BK-34	98.0	Volunteer	Belknap	100%	3 of 3	4.4 h	24 h
94	Concord MunicipalCON	98.0	Airport	Hillsborough	98.2%	165 of 168	8 min	2 h
95	Lake Winnipesaukee OutletLAKN3	97.9	Gauge	Belknap	100%	168 of 168	15 min	63 min
96	Lincoln NEPPLICN3	97.8	Gauge	Grafton	99.4%	167 of 168	15 min	2 h
97	OUTSIDE & NW OF P.O @ PENNACOOK NHSLSN3	97.8	Gauge	Merrimack	99.4%	167 of 168	15 min	1.8 h
98	Upper Ammonoosuc Rvr Nr GrovetonGRUN3	97.8	Gauge	Coos	99.4%	167 of 168	15 min	2 h
98	Oyster River At DurhamOYSN3	97.8	Gauge	Strafford	99.4%	167 of 168	15 min	2 h
100	Otter Brook At KeeneOTRN3	97.8	Gauge	Cheshire	99.4%	167 of 168	15 min	1.5 h
101	Monroe - McIndoes DamMCIN3	97.7	Gauge	Grafton	100%	168 of 168	16 min	70 min
102	Ashuelot River 5 NNW Surry Mt DamKENN3	97.7	Gauge	Cheshire	99.4%	167 of 168	15 min	1.5 h
103	Berlin MunicipalBML	97.6	Airport	Coos	100%	168 of 168	7 min	60 min
104	First Connecticut LakeFCLN3	97.6	Gauge	Coos	98.8%	166 of 168	15 min	2 h
105	Ashuelot RiverGILN3	97.5	Gauge	Cheshire	98.8%	166 of 168	15 min	2 h
106	Cockermouth River Below Hardy Brook At GrotonGRTN3	97.4	Gauge	Grafton	98.2%	165 of 168	15 min	2 h
107	Winnicut River At GreenlandWINN3	97.3	Gauge	Rockingham	98.2%	165 of 168	15 min	2 h
108	Coheco River Near RochesterCOCN3	97.3	Gauge	Strafford	98.2%	165 of 168	15 min	2 h
109	Pembroke - Bear BrookBERN3	97.2	Gauge	Merrimack	98.8%	166 of 168	17 min	2 h
110	Connecticut River 1 W DaltonDLTN3	97.0	Gauge	Coos	100%	168 of 168	20 min	60 min
111	Connecticut River 3 SW PittsburgPTSN3	97.0	Gauge	Coos	100%	168 of 168	20 min	75 min
112	Kingman Farm At MadburyKINN3	97.0	Gauge	Strafford	100%	168 of 168	20 min	65 min
112	Thompson Farm At DurhamTHON3	97.0	Gauge	Strafford	100%	168 of 168	20 min	65 min
114	Ashuelot River At HinsdaleHDLN3	97.0	Gauge	Cheshire	100%	168 of 168	20 min	78 min
114	Ashuelot River At West SwanzeySWAN3	97.0	Gauge	Cheshire	100%	168 of 168	20 min	78 min
116	Lancaster RAWSLNCN3	97.0	Gauge	Coos	99.4%	167 of 168	19 min	2 h
117	E. Brch Pemigewasset At LincolnLINN3	96.8	Gauge	Grafton	99.4%	167 of 168	20 min	2 h
118	Squam RiverSQAN3	96.8	Gauge	Grafton	99.4%	167 of 168	20 min	1.8 h
119	Cold River At AlsteadASTN3	96.8	Gauge	Cheshire	99.4%	167 of 168	20 min	2 h
119	Pittsburg - Lake FrancisLKFN3	96.8	Gauge	Coos	99.4%	167 of 168	20 min	2 h
119	Souhegan River At MilfordMFDN3	96.8	Gauge	Hillsborough	99.4%	167 of 168	20 min	2 h
119	Lamprey River At RaymondRAYN3	96.8	Gauge	Rockingham	99.4%	167 of 168	20 min	2 h
119	New Boston - SB PiscataquogSBPN3	96.8	Gauge	Hillsborough	99.4%	167 of 168	20 min	2 h
124	Exeter River At ExeterEXTN3	96.8	Gauge	Rockingham	99.4%	167 of 168	20 min	2 h
125	Grafton - Moore ResMORN3	96.6	Gauge	Grafton	99.3%	164 of 165	21 min	1.9 h
126	Gorham - Peabody RiverPEAN3	96.6	Gauge	Coos	98.8%	664 of 672	20 min	45 min
127	Diamond River 2 N Wentworth LocationDIAN3	96.6	Gauge	Coos	98.8%	166 of 168	20 min	2 h
127	Androscoggin River AT GorhamGRMN3	96.6	Gauge	Coos	98.8%	166 of 168	20 min	2 h
127	Connecticut River AT North StratfordNSTN3	96.6	Gauge	Coos	98.8%	166 of 168	20 min	2 h
130	Squam LakeSQLN3	96.6	Gauge	Grafton	98.8%	166 of 168	20 min	2 h
131	Androscoggin River At ErrolERRN3	96.6	Gauge	Coos	98.5%	662 of 672	19 min	45 min
132	Lamprey River 2 NW NewmarketLAMN3	96.5	Gauge	Strafford	98.8%	166 of 168	20 min	2 h
132	Beaver Brook At North PelhamNPEN3	96.5	Gauge	Hillsborough	98.8%	166 of 168	20 min	2 h
134	Nerrs Water Quality Site At Great Bay Near DurhamGBQN3	96.5	Gauge	Strafford	95.8%	161 of 168	15 min	2.1 h
135	CONNECTICUT RIVER AT North WalpoleWLPN3	96.0	Gauge	Cheshire	100%	168 of 168	25 min	76 min
136	Pemigewasset River At Franklin Falls DamFFDN3	96.0	Gauge	Merrimack	100%	168 of 168	25 min	1.5 h
137	Ashuelot River At KeeneKNEN3	96.0	Gauge	Cheshire	100%	168 of 168	25 min	62 min
138	New IpswitchNISN3	96.0	Gauge	Hillsborough	100%	168 of 168	25 min	63 min
139	Suncook River AT North ChichesterNCHN3	96.0	Gauge	Merrimack	97.0%	163 of 168	19 min	2 h
140	Stoddard - Island PondILPN3	95.9	Gauge	Cheshire	97.0%	163 of 168	19 min	2 h
141	Contoocook River 3 SW HennikerHENN3	95.8	Gauge	Merrimack	99.4%	167 of 168	25 min	1.5 h
142	Smith River 2 SW BristolBRSN3	95.8	Gauge	Grafton	99.4%	167 of 168	25 min	1.8 h
143	Ammonoosuc River AT BethlehemBETN3	95.8	Gauge	Grafton	99.4%	167 of 168	25 min	2 h
143	MERRIMACK RIVER AT Goffs FallsGOFN3	95.8	Gauge	Hillsborough	99.4%	167 of 168	25 min	2 h
143	Contoocook River At River HillRVHN3	95.8	Gauge	Merrimack	99.4%	167 of 168	25 min	2 h
143	Sugar River AT West ClaremontWCLN3	95.8	Gauge	Sullivan	99.4%	167 of 168	25 min	2 h
143	Connecticut River AT West LebanonWLBN3	95.8	Gauge	Grafton	99.4%	167 of 168	25 min	2 h
143	Pemigewasset River AT WoodstockWOON3	95.8	Gauge	Grafton	99.4%	167 of 168	25 min	2 h
149	Blackwater River 3 SE WebsterWBSN3	95.8	Gauge	Merrimack	99.4%	167 of 168	25 min	2 h
150	Saco River AT ConwayCNWN3	95.7	Gauge	Carroll	100%	168 of 168	20 min	78 min
151	CambridgeCMBN3	95.7	Gauge	Coos	97.9%	658 of 672	15 min	75 min
152	Freedom - Ossippee DamOSDN3	95.7	Gauge	Carroll	96.4%	162 of 168	20 min	2.8 h
153	Nottingham - Pawtuckaway LakePAWN3	95.7	Gauge	Rockingham	96.4%	162 of 168	20 min	2 h
154	Macdowell DamMACN3	95.6	Gauge	Hillsborough	98.8%	166 of 168	25 min	2 h
155	Merrimack River AT ConcordCONN3	95.6	Gauge	Merrimack	98.8%	166 of 168	25 min	2 h
155	Warner River AT DavisvilleDAVN3	95.6	Gauge	Merrimack	98.8%	166 of 168	25 min	2 h
155	Merrimack River AT Franklin JunctionFRJN3	95.6	Gauge	Merrimack	98.8%	166 of 168	25 min	2 h
155	PISCATAQUOG RIVER AT GoffstownGFFN3	95.6	Gauge	Hillsborough	98.8%	166 of 168	25 min	2 h
155	Spicket River At North SalemNSLN3	95.6	Gauge	Rockingham	98.8%	166 of 168	25 min	2 h
155	Pemigewasset River AT PlymouthPLMN3	95.6	Gauge	Grafton	98.8%	166 of 168	25 min	2 h
155	CONTOOCOOK RIVER AT PeterboroughPTRN3	95.6	Gauge	Hillsborough	98.8%	166 of 168	25 min	2 h
155	Baker River 2 SW RumneyRUMN3	95.6	Gauge	Grafton	98.8%	166 of 168	25 min	2 h
155	Winnipesau River At TiltonTLTN3	95.6	Gauge	Belknap	98.8%	166 of 168	25 min	2 h
164	SOUHEGAN RIVER AT MerrimackSOHN3	95.6	Gauge	Hillsborough	98.8%	166 of 168	25 min	2 h
165	Contoocook River At West HopkintonCOTN3	95.6	Gauge	Merrimack	98.8%	166 of 168	25 min	2 h
166	LyndeboroughLYNN3	95.4	Gauge	Hillsborough	98.2%	165 of 168	25 min	2 h
167	Middleton 0.7 WSWNH-ST-60	95.2	Volunteer	Strafford	100%	3 of 3	10.4 h	24 h
168	Everett LakeWERN3	95.2	Gauge	Hillsborough	97.9%	329 of 336	25 min	61 min
169	Errol Airport NEPPERAN3	95.1	Gauge	Coos	91.6%	154 of 168	15 min	3 h
170	Swift River Near ConwayALBN3	95.0	Gauge	Carroll	100%	168 of 168	30 min	78 min
171	Lyman 1.7 NNWNH-GR-72	94.8	Volunteer	Grafton	100%	3 of 3	11.4 h	2 days
172	Wakefield - Great East LakeGELN3	94.8	Gauge	Carroll	99.4%	167 of 168	30 min	2 h
172	Horace LakeHRLN3	94.8	Gauge	Hillsborough	99.4%	167 of 168	30 min	2 h
172	PittsfieldPTFN3	94.8	Gauge	Merrimack	99.4%	167 of 168	30 min	2 h
172	East KingstonPWPN3	94.8	Gauge	Rockingham	99.4%	167 of 168	30 min	2 h
172	Tilton - Silver LakeSLVN3	94.8	Gauge	Belknap	99.4%	167 of 168	30 min	2 h
177	Great Bay At DurhamBGXN3	94.6	Gauge	Rockingham	98.8%	166 of 168	30 min	1.8 h
178	Littleton - Comerford ResCFDN3	94.4	Gauge	Grafton	98.1%	162 of 165	30 min	2 h
179	Barrington - Mendums PondMENN3	93.9	Gauge	Rockingham	97.6%	164 of 168	30 min	3.3 h
180	Wentworth 2WNW - Baker FloodBKPN3	93.9	Gauge	Grafton	97.0%	163 of 168	30 min	2.3 h
181	ManchesterMNCN3	93.9	Cooperative	Hillsborough	85.7%	6 of 7	2 min	2 days
182	HanoverHANN3	93.9	Cooperative	Grafton	85.7%	6 of 7	13 min	27.7 h
183	NashuaZBWN3	93.9	Cooperative	Hillsborough	85.7%	6 of 7	23 min	46.8 h
184	West HampsteadHMPN3	93.9	Cooperative	Rockingham	85.7%	6 of 7	23 min	47.8 h
185	NorthwoodNORN3	93.9	Gauge	Rockingham	85.7%	6 of 7	55 min	37.1 h
186	WolfeburroWOLN3	93.9	Cooperative	Carroll	85.7%	6 of 7	62 min	2 days
187	West HopkintonWHPN3	93.9	Cooperative	Merrimack	85.7%	6 of 7	1.5 h	36.1 h
188	Dam WithinPTBN3	93.9	Cooperative	Coos	85.7%	6 of 7	1.5 h	2 days
189	EPPN3EPPN3	93.9	DCP	-	85.7%	6 of 7	1.7 h	24 h
190	Sunapee 2.3 NNH-SL-8	93.8	Volunteer	Sullivan	100%	3 of 3	13.4 h	24 h
191	Alton - Sunset LakeSSLN3	93.7	Gauge	Belknap	96.4%	162 of 168	30 min	2.3 h
192	Deering ResDRRN3	93.7	Gauge	Hillsborough	96.4%	162 of 168	30 min	2.8 h
193	Mount WashingtonMWN	93.6	Airport	Coos	100%	168 of 168	14 min	70 min
194	JeffersonJEFN3	93.6	Cooperative	Coos	85.7%	6 of 7	3.2 h	47 h
195	Contoocook River At Hopkinton LakeWHKN3	93.5	Gauge	Merrimack	93.1%	313 of 336	25 min	1.5 h
196	Dorchester - Baker Flood Control 8BEIN3	93.4	Gauge	Grafton	97.6%	164 of 168	25 min	3 h
197	Hampton - Hampton RiverHPMN3	93.4	Gauge	Rockingham	97.1%	544 of 560	33 min	53 min
198	Madison - Pequawket Pond DamPEQN3	92.5	Gauge	Carroll	98.2%	165 of 168	10 min	2.3 h
199	MERRIMACK RIVER AT NashuaNSHN3	91.8	Gauge	Hillsborough	92.8%	156 of 168	20 min	7 h
200	Durham 2 N54794	91.7	Reference	Strafford	100%	67 of 67	1.5 h	3.1 h
200	Durham 2 SSW54795	91.7	Reference	Strafford	100%	67 of 67	1.5 h	3.1 h
202	Isinglass River At DoverISIN3	91.5	Gauge	Strafford	99.4%	167 of 168	20 min	2 h
203	Plymouth1P1	91.2	Airport	Grafton	92.6%	467 of 504	4 min	4.3 h
204	Second Connecticut LakeSECN3	90.8	Gauge	Coos	85.2%	191 of 224	25 min	63 min
205	Sunapee - Sugar RiverSCFN3	90.4	Gauge	Sullivan	91.6%	154 of 168	25 min	7 h
206	Lake WinnisquamLKWN3	90.0	Gauge	Belknap	82.5%	185 of 224	24 min	63 min
207	WhitefieldHIE	89.9	Airport	Coos	79.4%	186 of 234	7 min	60 min
208	Newfound RiverBRTN3	89.7	Gauge	Grafton	81.7%	183 of 224	24 min	2 h
209	Lebanon MunicipalLEB	89.1	Airport	Grafton	71.4%	218 of 305	6 min	77 min
210	DamFFLN3	88.9	Cooperative	Merrimack	71.4%	5 of 7	1.5 h	36.1 h
211	Surry Mountain LakeSURN3	88.9	Cooperative	Cheshire	71.4%	5 of 7	1.9 h	36.1 h
212	ColebrookCOLN3	88.9	Cooperative	Coos	71.4%	5 of 7	1.9 h	2.1 days
213	Hubbard Brook ScanHUBN3	88.7	Gauge	Grafton	95.2%	160 of 168	45 min	5 h
213	Mascoma River ScanMSRN3	88.7	Gauge	Grafton	95.2%	160 of 168	45 min	5 h
215	Canaan - Goose PondGOPN3	88.6	Gauge	Grafton	89.2%	150 of 168	20 min	13 h
216	Keene/Dillant(AWOS)EEN	88.3	Airport	Cheshire	71.8%	207 of 288	11 min	68 min
217	Hubbard BrookS2069	87.4	Soil	Grafton	93.3%	127 of 136	43 min	7 h
218	Eaton Center 1.6 SSENH-CR-53	87.3	Volunteer	Carroll	66.6%	2 of 3	26 min	37.1 h
218	Randolph 1.4 NENH-CS-10	87.3	Volunteer	Coos	66.6%	2 of 3	26 min	37.1 h
220	Raymond 1.2 SWNH-RC-102	87.3	Volunteer	Rockingham	66.6%	2 of 3	26 min	35.1 h
220	Lee 0.3 NENH-ST-58	87.3	Volunteer	Strafford	66.6%	2 of 3	26 min	35.1 h
222	Plymouth 1.6 NNENH-GR-11	87.3	Volunteer	Grafton	66.6%	2 of 3	26 min	2 days
222	Derry 5.7 NNH-RC-72	87.3	Volunteer	Rockingham	66.6%	2 of 3	26 min	2 days
224	Dover 2.5 NNH-ST-14	87.3	Volunteer	Strafford	66.6%	2 of 3	86 min	38.1 h
225	Campton 1.6 SSENH-GR-51	87.3	Volunteer	Grafton	66.6%	2 of 3	86 min	36.1 h
226	North Conway 1.4 SSWNH-CR-11	87.3	Volunteer	Carroll	66.6%	2 of 3	86 min	37.1 h
226	Tamworth 0.4 NNWNH-CR-27	87.3	Volunteer	Carroll	66.6%	2 of 3	86 min	37.1 h
228	Belmont 1.7 SWNH-BK-2	87.3	Volunteer	Belknap	66.6%	2 of 3	86 min	3 days
229	Henniker 1.4 NNENH-MR-82	87.3	Volunteer	Merrimack	66.6%	2 of 3	86 min	36.1 h
230	Wakefield 6.0 NNWNH-CR-34	87.3	Volunteer	Carroll	66.6%	2 of 3	2.4 h	37.1 h
231	Brookline 1.7 NNENH-HL-120	86.8	Volunteer	Hillsborough	66.6%	2 of 3	3.4 h	24 h
232	Epsom 4.2 SWNH-MR-74	86.8	Volunteer	Merrimack	66.6%	2 of 3	3.4 h	37.1 h
233	Stoddard - Highland LakeHLLN3	86.7	Gauge	Cheshire	89.2%	150 of 168	30 min	13 h
234	Jaffrey MunicipalAFN	86.5	Airport	Cheshire	62.7%	226 of 360	7 min	60 min
235	Hampstead 1.6 NNENH-RC-33	86.4	Volunteer	Rockingham	66.6%	2 of 3	4.4 h	37.1 h
236	Mascoma RiverS2043	84.7	Soil	Grafton	92.6%	126 of 136	53 min	8 h
237	GreenlandGLDN3	84.0	Cooperative	Rockingham	71.4%	5 of 7	13 h	2 days
238	Blackwater River At Blackwater DamBIKN3	83.9	Gauge	Merrimack	85.1%	143 of 168	25 min	26.6 h
239	Pinkham NotchGHMN3	83.9	Cooperative	Coos	57.1%	4 of 7	18 min	2.6 days
240	Walpole 2 S NeppWPSN3	83.9	Cooperative	Cheshire	57.1%	4 of 7	2.2 h	2 days
241	Milton 3 PondsMLTN3	83.0	Gauge	Strafford	100%	168 of 168	15 min	63 min
242	Holderness 5WNWHDEN3	83.0	Gauge	Grafton	57.1%	4 of 7	4.4 h	2 days
243	Epping 0.9 WNH-RC-99	82.7	Volunteer	Rockingham	66.6%	2 of 3	12.4 h	2 days
244	Albany 2.8 SWNH-CR-41	81.3	Volunteer	Carroll	66.6%	2 of 3	15.4 h	2 days
245	Gorham AirportGHNN3	80.8	Gauge	Coos	99.4%	167 of 168	15 min	2 h
246	North Haverhill 2.9 ENH-GR-69	80.8	Volunteer	Grafton	66.6%	2 of 3	16.4 h	37.1 h
246	Northwood 2.9 WSWNH-RC-48	80.8	Volunteer	Rockingham	66.6%	2 of 3	16.4 h	37.1 h
248	Hanover 4.8 NENH-GR-52	80.8	Volunteer	Grafton	66.6%	2 of 3	16.4 h	2 days
249	Jackson 3.7 NWNH-CR-15	80.8	Volunteer	Carroll	66.6%	2 of 3	16.4 h	3 days
250	New Ipswich - Souhegan Flood Control 19SSNN3	80.0	Gauge	Hillsborough	87.5%	147 of 168	2.6 h	13 h

How a station is ranked

The 247 Rank answers one question about a weather station: can its readings be relied on? A station has to deliver: its reports arrive when due, soon, without long silences. And its readings have to be right: close to a trusted station nearby, passing their checks, and in step with the weather the forecast and its neighbours confirm.

The 247 score

Storm Station's poller asks every network on its own schedule, around the clock, and keeps the time of every report it hears; the reference comparison and the forecast engine keep the rest. From the last seven days of that record each station is scored out of 100 on six parts, and its 247 score is their weighted mean:

Reports receivedweight 35The share of its scheduled reports received. A station that sends every 5 minutes is due 2,016 reports in a week; one that reports once a day is due 7. Each report is counted in a slot centred on the station's own report time, so a report a minute early or late is still on time, and the week ends an hour back, so a report still on its way is never counted missed.Full marks: 100% received. No marks: none received.
Arrivalweight 10The median time its reports took to arrive from the moment a reading was taken to the moment it reached Storm Station.Full marks: within 10 minutes, or a tenth of its schedule for a station that reports less often. No marks: an hour, or its whole schedule.
Continuityweight 10Its longest silence against its own schedule, so a daily gauge is not marked down for a day between reports.Full marks: a silence of 3 reports or less. No marks: 72 reports, falling evenly on a log scale between.
Accuracyweight 20How closely its temperature follows its reference station the nearest airport or climate reference station that reported within half an hour, up to 15 miles away, reading by reading. A steady offset is taken out, and where both heights are known only the offset beyond 3 F that the height difference does not explain is counted.Full marks: within 1.5 F, allowing 0.1 F more for each mile to the reference. No marks: 6.5 F beyond that.
Instrument checksweight 15The share of its readings that pass a check. For an airfield, the check the forecast engine runs the next day: each reading against the stations around it, as weather services check their own. For any other station, a reading 20 F or more from its reference fails, unless the two stand 3,000 ft or more apart.Full marks: none failed. No marks: 5% failed.
Forecast checkweight 10How closely its temperature matched Storm Station's forecast for the same hours, checked the next day, for every airfield the forecast engine scores. A station whose readings stray far from a forecast its neighbours confirm is one to doubt.Full marks: within 2 F on average. No marks: 8 F.

A part is scored once the week holds 24 readings or comparisons for it. A part that cannot be measured where a station stands counts at the middle of its state's measured stations, so the station is neither lifted nor sunk by it. A part measured nowhere in the state is left out, and the others carry its weight.

From score to rank

Each state's stations are ranked by their score, to the tenth. At an equal score the longer record comes first: a station that sent 2,016 of 2,016 reports has shown more than one that sent 7 of 7. Then the faster arrival, then the shorter silence. Ties on all of them share a rank, as a race is scored: three stations tied for third are all third, and the next is sixth.

A station is ranked once its week holds enough reports to measure: 12, or 3 days for a gauge that reports once a day. The rank is made again every day, so a station that falls silent or starts to read wrong drops, and one that recovers climbs back. Every page shows the same ranking: a station's rank here, in its state's list and on its own page come from one run, and a new run reaches them together. Each station's page shows its score part by part, with the figures behind each.

The same figures as data

/api/ranks for a state and /api/rank for one station, its score in parts; the developer page has every field.