Live/247 Rank/Illinois

Illinois 24/7 Rank

Every station in Illinois 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.

1,162 stations ranked43.4% sent every report dueranked October 4, 2026page 4 of 5Illinois instrumentsIllinois 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 1,162 ranked here, 1,157 have a page of their own; the rest are platforms heard here that have not yet reported enough to be listed.

Every station, ranked

Rank	Station	Score	Network	County	Received	Reports	Arrives in	Longest silence
751	DanvilleDANI2	94.1	Cooperative	Vermilion	85.7%	6 of 7	12 min	2 days
752	Dam 13FLTI2	94.1	Cooperative	Whiteside	85.7%	6 of 7	13 min	2 days
753	Morris 1NWMOSI2	94.1	Cooperative	Grundy	85.7%	6 of 7	22 min	35 h
754	GalesburgGBGI2	94.1	Cooperative	Knox	85.7%	6 of 7	23 min	24 h
755	AltonALNI2	94.1	Cooperative	Madison	85.7%	6 of 7	23 min	2 days
755	FairfieldFFDI2	94.1	Cooperative	Wayne	85.7%	6 of 7	23 min	2 days
757	Bloomington WaterworksBMGI2	94.1	Cooperative	Mclean	85.7%	6 of 7	33 min	2 days
758	Woodstock 5NWWODI2	94.1	Cooperative	McHenry	85.7%	6 of 7	33 min	38 h
759	Peoria 5NWPRWI2	94.1	Cooperative	Peoria	85.7%	6 of 7	52 min	2 days
760	MinonkMINI2	94.1	Cooperative	Woodford	85.7%	6 of 7	63 min	35 h
761	EffinghamEFMI2	94.1	Cooperative	Effingham	85.7%	6 of 7	1.7 h	2 days
762	NeogaNOGI2	94.1	Cooperative	Cumberland	85.7%	6 of 7	2 h	36.8 h
763	Streator 2SESTAI2	94.1	Cooperative	Livingston	85.7%	6 of 7	2.4 h	25 h
764	Mississippi River At Alton IlALOI2	94.0	Gauge	Madison	99.1%	333 of 336	15 min	60 min
765	Chicago/LansingIGQ	94.0	Airport	Lake	97.4%	491 of 504	14 min	2.7 h
766	ArthurARTI2	94.0	Cooperative	Moultrie	85.7%	6 of 7	2.7 h	2 days
767	FloraFOAI2	94.0	Gauge	Clay	85.7%	6 of 7	2.7 h	2 days
768	ParisPRG	93.9	Airport	Edgar	97.2%	490 of 504	14 min	2.7 h
769	Mount CarmelAJG	93.9	Airport	Knox	97.0%	489 of 504	14 min	2.7 h
770	Spring Creek AT SpringfieldSPFI2	93.8	Gauge	Sangamon	98.8%	83 of 84	65 min	4.3 h
771	GalesburgGBG	93.8	Airport	Knox	97.6%	492 of 504	14 min	2.7 h
771	KankakeeIKK	93.8	Airport	Kankakee	97.6%	492 of 504	14 min	2.7 h
773	SpartaSAR	93.8	Airport	Randolph	96.6%	487 of 504	14 min	2.7 h
774	Downers Grove 0.9 SIL-DP-98	93.6	Volunteer	DuPage	100%	3 of 3	14.4 h	24 h
775	Cypress 1.4 WSWIL-JH-3	93.6	Volunteer	Johnson	100%	3 of 3	14.4 h	24 h
776	RochelleRPJ	93.4	Airport	Lee	97.0%	489 of 504	14 min	2.7 h
777	Salem/LeckroneSLO	93.2	Airport	Marion	97.8%	493 of 504	14 min	2.7 h
778	Urbana 0.9 SSEIL-CP-169	93.1	Volunteer	Champaign	100%	3 of 3	15.4 h	24 h
779	Harrisburg 3.5 NNEIL-SL-7	93.1	Volunteer	Saline	100%	3 of 3	15.4 h	2 days
780	MacombMQBI2	93.1	Cooperative	McDonough	85.7%	6 of 7	4.7 h	2 days
781	Shoal Creek AT PierronPRNI2	93.0	Gauge	Bond	99.4%	334 of 336	40 min	1.5 h
782	Olney-NobleOLY	93.0	Airport	Richland	97.8%	493 of 504	19 min	2.7 h
783	Bloomington - Kickapoo CreekBKCI2	92.9	Gauge	Mclean	100%	84 of 84	80 min	3.3 h
784	ChicagoCCHI2	92.9	Gauge	Cook	99.1%	111 of 112	44 min	3.5 h
785	Bean Ridge RAWSBNRI2	92.7	Gauge	Alexander	99.4%	167 of 168	18 min	2 h
786	O Brien Lock And DamOBII2	92.6	Gauge	Cook	99.4%	167 of 168	20 min	2 h
787	Wilton CenterWTTI2	92.4	Gauge	Will	89.2%	200 of 224	25 min	62 min
788	Macomb MuniMQB	92.3	Airport	McDonough	97.4%	491 of 504	14 min	2.7 h
789	Highland Park - Skokie RiverHIPI2	92.3	Gauge	Lake	93.3%	627 of 672	15 min	2.3 h
790	De Kalb 3.2 WNWIL-DK-9	92.2	Volunteer	De Kalb	100%	3 of 3	17.4 h	24 h
791	Dupage County Rain At DarienDARI2	92.2	Gauge	DuPage	88.8%	199 of 224	25 min	62 min
792	HarrisburgHSB	92.0	Airport	Saline	97.2%	490 of 504	14 min	3 h
793	PontiacPNT	92.0	Airport	Livingston	94.6%	477 of 504	14 min	3.1 h
794	Champaign 9 SW54808	91.8	Reference	Champaign	100%	67 of 67	1.5 h	3 h
794	Shabbona 5 NNE54811	91.8	Reference	De Kalb	100%	67 of 67	1.5 h	3 h
796	Wood Dale - Salt CreekWDSI2	91.7	Gauge	Du Page	98.8%	166 of 168	45 min	3 h
797	Kaskaskia River AT New AthensNASI2	91.7	Gauge	St Clair	98.8%	166 of 168	45 min	3 h
798	Mount Vernon [CCOOP]MVNI2	91.6	Gauge	Jefferson	92.3%	931 of 1,008	15 min	55 min
799	LemontLMNI2	91.4	Gauge	Cook	98.8%	166 of 168	44 min	3.5 h
800	JolietJOLI2	91.4	Gauge	Will	98.2%	167 of 170	44 min	1.5 h
801	CentraliaENL	91.3	Airport	Marion	97.0%	489 of 504	14 min	2.7 h
802	Addison County Rain At AddisonADSI2	91.1	Gauge	DuPage	85.7%	192 of 224	25 min	1.8 h
803	ChillicotheCHLI2	91.1	Gauge	Peoria	85.2%	191 of 224	24 min	62 min
803	Ohio River AT GolcondaGOLI2	91.1	Gauge	Pope	85.2%	191 of 224	24 min	62 min
805	Mississippi River AT Rock Island LD15RCKI2	90.9	Gauge	Rock Island	99.4%	334 of 336	25 min	1.5 h
806	East Fork Shoal CreekCOFI2	90.9	Gauge	Montgomery	84.8%	190 of 224	24 min	2 h
806	ElwoodEWLI2	90.9	Gauge	Will	84.8%	190 of 224	24 min	2 h
806	FrankfortFKTI2	90.9	Gauge	Will	84.8%	190 of 224	24 min	2 h
806	Homer GlenHGPI2	90.9	Gauge	Will	84.8%	190 of 224	24 min	2 h
806	ManhattanMHHI2	90.9	Gauge	Will	84.8%	190 of 224	24 min	2 h
811	Monee 5W - Will CountyMNEI2	90.8	Gauge	Will	84.3%	189 of 224	24 min	2 h
812	Des Plaines River AT LyonsLYNI2	90.6	Gauge	Cook	98.2%	165 of 168	45 min	4 h
813	SummitSCOI2	90.5	Gauge	Cook	95.2%	160 of 168	45 min	3 h
814	Nippersink Creek AT Spring GroveNIPI2	90.3	Gauge	Mchenry	83.0%	186 of 224	24 min	2 h
815	RobinsonRSV	89.9	Airport	Sullivan	97.2%	490 of 504	14 min	3.3 h
816	Rock Falls - Sinnissippi DamSSDI2	89.7	Gauge	Whiteside	88.1%	148 of 168	35 min	3.3 h
817	Stickney - Chicago Sanitary CanalSTII2	89.5	Gauge	Cook	97.0%	163 of 168	45 min	5 h
818	Thorn Creek AT ThorntonTHNI2	89.4	Gauge	Cook	91.3%	614 of 672	19 min	3.5 h
819	Beecher 3.4 ENEIL-WL-84	89.1	Volunteer	Will	100%	3 of 3	24.4 h	25 h
820	Sparta 2.4 NWIL-RH-7	89.1	Volunteer	Randolph	100%	3 of 3	26.4 h	24 h
821	Sangamon River AT Decatur WTPDECI2	89.1	Cooperative	Macon	71.4%	5 of 7	4 min	2 days
822	JerseyvilleJVLI2	89.1	Cooperative	Jersey	71.4%	5 of 7	13 min	36 h
823	Earlville 3SERVI2	89.1	Cooperative	La Salle	71.4%	5 of 7	13 min	37 h
824	Fort Massac State ParkFTMI2	89.1	Cooperative	Massac	71.4%	5 of 7	23 min	3 days
825	PeotonePEOI2	89.1	Cooperative	Will	71.4%	5 of 7	23 min	3 days
826	Monmouth 4NWMMTI2	89.1	Cooperative	Warren	71.4%	5 of 7	63 min	35 h
827	Mendota 1SMDTI2	89.1	Cooperative	La Salle	71.4%	5 of 7	63 min	2 days
828	Sewage PlantMDHI2	89.1	Cooperative	Jackson	71.4%	5 of 7	63 min	36 h
829	Kankakee WWTPKKEI2	89.1	Cooperative	Kankakee	71.4%	5 of 7	73 min	36 h
830	Amboy WaterAMBI2	89.1	Cooperative	Lee	71.4%	5 of 7	73 min	35 h
831	Hebron (Hydro)HEBI2	89.1	Cooperative	McHenry	71.4%	5 of 7	1.7 h	2 days
832	Glen Ellyn 4SGLEI2	89.1	Cooperative	DuPage	71.4%	5 of 7	2.2 h	2 days
833	Athens 2SWAHNI2	89.1	Cooperative	Menard	71.4%	5 of 7	2.4 h	24 h
834	Big Muddy Subimpoundment AT Big Muddy SubimpoundmentBSII2	88.8	Gauge	Jefferson	99.1%	333 of 336	25 min	1.5 h
835	Chicago - Sanitary and Ship CanalCSWI2	88.7	Gauge	Cook	94.6%	318 of 336	45 min	2.5 h
836	HoopestonHOPI2	88.6	Cooperative	Vermilion	71.4%	5 of 7	3.5 h	2 days
837	HavanaHVAI2	88.5	Cooperative	Mason	71.4%	5 of 7	3.7 h	2 days
838	Orland ParkORLI2	88.4	Gauge	Cook	95.5%	321 of 336	44 min	3 h
839	Berwyn - ISWS Lake MichiganBERI2	88.3	Gauge	Cook	95.8%	322 of 336	44 min	3 h
840	Chicago - NB Chicago River at GrandNBGI2	88.3	Gauge	Cook	95.2%	160 of 168	45 min	6.1 h
841	Lake VillaFLVI2	88.3	Gauge	Lake	92.8%	156 of 168	30 min	12 h
842	Lansing - ISWS Lake Michigan DiversionLSGI2	87.8	Gauge	Cook	94.9%	319 of 336	44 min	3.5 h
843	Waukegan HarborWHRI2	87.6	Gauge	Lake	99.4%	167 of 168	25 min	2 h
844	Chicago - ISWS Lake Michigan DiversionCBLI2	87.5	Gauge	Cook	95.8%	322 of 336	44 min	3 h
845	ChicagoCHWI2	87.5	Gauge	Cook	95.8%	322 of 336	44 min	3 h
846	Mattoon 2.1 WIL-CE-17	87.5	Volunteer	Coles	66.6%	2 of 3	26 min	36 h
846	Flossmoor 1.2 ESEIL-CK-229	87.5	Volunteer	Cook	66.6%	2 of 3	26 min	36 h
846	Normal 1.2 ESEIL-MCL-64	87.5	Volunteer	McLean	66.6%	2 of 3	26 min	36 h
849	Spring Grove 1.2 ESEIL-MCH-108	87.5	Volunteer	McHenry	66.6%	2 of 3	26 min	37 h
849	Lena 0.3 SSEIL-SP-31	87.5	Volunteer	Stephenson	66.6%	2 of 3	26 min	37 h
851	Naperville 2.5 ESEIL-DP-49	87.5	Volunteer	DuPage	66.6%	2 of 3	26 min	33 h
852	New Lenox 2.8 SEIL-WL-179	87.5	Volunteer	Will	66.6%	2 of 3	26 min	34 h
853	Winthrop Harbor 0.2 SSEIL-LK-23	87.5	Volunteer	Lake	66.6%	2 of 3	26 min	36 h
854	Winnebago 3.6 NWIL-WN-56	87.5	Volunteer	Winnebago	66.6%	2 of 3	26 min	37 h
855	Lombard 0.2 NIL-DP-187	87.5	Volunteer	DuPage	66.6%	2 of 3	26 min	35 h
855	Geneva 1.0 SSWIL-KN-22	87.5	Volunteer	Kane	66.6%	2 of 3	26 min	35 h
857	Chicago Ridge 0.2 WSWIL-CK-152	87.5	Volunteer	Cook	66.6%	2 of 3	26 min	36 h
857	Buckley 4.0 ENEIL-IR-26	87.5	Volunteer	Iroquois	66.6%	2 of 3	26 min	36 h
857	Yorkville 1.0 NIL-KD-109	87.5	Volunteer	Kendall	66.6%	2 of 3	26 min	36 h
857	Marengo 0.7 NNEIL-MCH-87	87.5	Volunteer	McHenry	66.6%	2 of 3	26 min	36 h
857	Lacon 4.3 NEIL-MH-8	87.5	Volunteer	Marshall	66.6%	2 of 3	26 min	36 h
857	Dunlap 2.6 NEIL-PR-4	87.5	Volunteer	Peoria	66.6%	2 of 3	26 min	36 h
857	Taylor Ridge 1.1 NIL-RI-24	87.5	Volunteer	Rock Island	66.6%	2 of 3	26 min	36 h
864	Homer Glen 0.7 NNEIL-WL-131	87.5	Volunteer	Will	66.6%	2 of 3	26 min	37 h
865	Palatine 2.6 WNWIL-CK-405	87.5	Volunteer	Cook	66.6%	2 of 3	26 min	36 h
866	Chatsworth 1.2 SIL-LV-21	87.5	Volunteer	Livingston	66.6%	2 of 3	26 min	2 days
866	Bloomington 4.1 SWIL-MCL-81	87.5	Volunteer	McLean	66.6%	2 of 3	26 min	2 days
868	Crystal Lake 1.0 WSWIL-MCH-83	87.5	Volunteer	McHenry	66.6%	2 of 3	26 min	3 days
869	Peru 0.6 SWIL-LS-12	87.5	Volunteer	La Salle	66.6%	2 of 3	26 min	34 h
870	Charleston 0.8 NWIL-CE-13	87.5	Volunteer	Coles	66.6%	2 of 3	86 min	34 h
870	Hoffman Estates 2.5 NNEIL-CK-414	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	34 h
872	Carlock 5.5 NIL-WF-32	87.5	Volunteer	Woodford	66.6%	2 of 3	86 min	35 h
873	Batavia 3.4 WSWIL-KN-128	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	37 h
874	New Lenox 2.9 ENEIL-WL-72	87.5	Volunteer	Will	66.6%	2 of 3	86 min	35 h
875	Oak Lawn 0.5 SSWIL-CK-149	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	37 h
875	Chicago 5.5 NNWIL-CK-359	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	37 h
875	Cortland 0.3 EIL-DK-38	87.5	Volunteer	De Kalb	66.6%	2 of 3	86 min	37 h
875	Oswego 1.1 ESEIL-KD-126	87.5	Volunteer	Kendall	66.6%	2 of 3	86 min	37 h
879	Lanark 0.3 SSWIL-CR-25	87.5	Volunteer	Carroll	66.6%	2 of 3	86 min	38 h
879	Elgin 7.5 WSWIL-KN-86	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	38 h
879	Machesney Park 0.9 WIL-WN-45	87.5	Volunteer	Winnebago	66.6%	2 of 3	86 min	38 h
882	Davis 0.5 NIL-SP-7	87.5	Volunteer	Stephenson	66.6%	2 of 3	86 min	47 h
883	Gilberts 0.5 NIL-KN-98	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	2.9 days
884	Charleston 4.7 SSWIL-CE-8	87.5	Volunteer	Coles	66.6%	2 of 3	86 min	35 h
884	Champaign 2.4 SSEIL-CP-64	87.5	Volunteer	Champaign	66.6%	2 of 3	86 min	35 h
884	Wheaton 1.2 NNWIL-DP-161	87.5	Volunteer	DuPage	66.6%	2 of 3	86 min	35 h
884	Batavia 0.3 SEIL-KN-132	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	35 h
884	St. Charles 0.1 EIL-KN-64	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	35 h
884	Highland Park 1.1 NIL-LK-136	87.5	Volunteer	Lake	66.6%	2 of 3	86 min	35 h
884	Danville 2.5 EIL-VR-44	87.5	Volunteer	Vermilion	66.6%	2 of 3	86 min	35 h
884	Rockford 6.8 SWIL-WN-60	87.5	Volunteer	Winnebago	66.6%	2 of 3	86 min	35 h
892	Palatine 1.4 NNEIL-CK-294	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
892	Hometown 0.3 SIL-CK-455	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
892	Palos Park 1.3 SWIL-CK-50	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
892	Lombard 1.2 EIL-DP-163	87.5	Volunteer	DuPage	66.6%	2 of 3	86 min	36 h
892	Dwight 2.2 NNWIL-GY-38	87.5	Volunteer	Grundy	66.6%	2 of 3	86 min	36 h
892	Stockton 5.9 WNWIL-JD-15	87.5	Volunteer	Jo Daviess	66.6%	2 of 3	86 min	36 h
892	Montgomery 0.8 SSEIL-KD-5	87.5	Volunteer	Kendall	66.6%	2 of 3	86 min	36 h
892	North Aurora 0.3 NNEIL-KN-160	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	36 h
892	Galesburg 2.5 NIL-KX-24	87.5	Volunteer	Knox	66.6%	2 of 3	86 min	36 h
892	St. Augustine 0.1 NNWIL-KX-30	87.5	Volunteer	Knox	66.6%	2 of 3	86 min	36 h
892	Warrensburg 0.6 EIL-MA-32	87.5	Volunteer	Macon	66.6%	2 of 3	86 min	36 h
892	Crystal Lake 3.9 WNWIL-MCH-107	87.5	Volunteer	McHenry	66.6%	2 of 3	86 min	36 h
892	Crystal Lake 2.9 ENEIL-MCH-109	87.5	Volunteer	McHenry	66.6%	2 of 3	86 min	36 h
892	Harvard 2.8 SSEIL-MCH-66	87.5	Volunteer	McHenry	66.6%	2 of 3	86 min	36 h
892	Wyoming 0.3 SSWIL-SK-7	87.5	Volunteer	Stark	66.6%	2 of 3	86 min	36 h
892	Sterling 5.9 NNEIL-WD-24	87.5	Volunteer	Whiteside	66.6%	2 of 3	86 min	36 h
908	Morrison 3.2 EIL-WD-5	87.5	Volunteer	Whiteside	66.6%	2 of 3	86 min	37 h
909	Palatine 1.3 EIL-CK-121	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	33 h
909	Elgin 0.9 WSWIL-KN-143	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	33 h
911	Worth 0.3 SIL-CK-430	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
911	Chicago 3.3 SIL-CK-458	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
911	Homewood 0.1 ESEIL-CK-64	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
911	Park Forest 0.8 NNEIL-CK-69	87.5	Volunteer	Cook	66.6%	2 of 3	86 min	36 h
911	Dewey 2.70 NWIL-CP-153	87.5	Volunteer	Champaign	66.6%	2 of 3	86 min	36 h
911	Champaign 0.3 ESEIL-CP-89	87.5	Volunteer	Champaign	66.6%	2 of 3	86 min	36 h
911	Downers Grove 1.8 SSEIL-DP-189	87.5	Volunteer	DuPage	66.6%	2 of 3	86 min	36 h
911	Roselle 1.0 SEIL-DP-190	87.5	Volunteer	DuPage	66.6%	2 of 3	86 min	36 h
911	Morris 1.5 SWIL-GY-28	87.5	Volunteer	Grundy	66.6%	2 of 3	86 min	36 h
911	New Windsor 2.0 NIL-HY-6	87.5	Volunteer	Henry	66.6%	2 of 3	86 min	36 h
911	Montgomery 3.5 WSWIL-KD-99	87.5	Volunteer	Kendall	66.6%	2 of 3	86 min	36 h
911	Batavia 0.8 WIL-KN-135	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	36 h
911	Normal 1.7 SEIL-MCL-63	87.5	Volunteer	McLean	66.6%	2 of 3	86 min	36 h
911	Viola 0.4 EIL-MR-10	87.5	Volunteer	Mercer	66.6%	2 of 3	86 min	36 h
911	Moline 0.7 NNEIL-RI-13	87.5	Volunteer	Rock Island	66.6%	2 of 3	86 min	36 h
911	Swansea 0.7 ESEIL-SC-40	87.5	Volunteer	St. Clair	66.6%	2 of 3	86 min	36 h
911	Ridott 3.2 WNWIL-SP-35	87.5	Volunteer	Stephenson	66.6%	2 of 3	86 min	36 h
911	Rock Falls 3.1 SIL-WD-22	87.5	Volunteer	Whiteside	66.6%	2 of 3	86 min	36 h
911	Wilmington 0.9 ENEIL-WL-164	87.5	Volunteer	Will	66.6%	2 of 3	86 min	36 h
930	Maple Park 3.9 SIL-KN-134	87.5	Volunteer	Kane	66.6%	2 of 3	86 min	37 h
930	Grayslake 0.7 WSWIL-LK-18	87.5	Volunteer	Lake	66.6%	2 of 3	86 min	37 h
932	Yorkville 3.1 NIL-KD-143	87.5	Volunteer	Kendall	66.6%	2 of 3	86 min	2 days
933	Joliet 1.8 NNEIL-WL-103	87.5	Volunteer	Will	66.6%	2 of 3	86 min	32 h
934	Atwood 5.4 NWIL-PT-3	87.5	Volunteer	Piatt	66.6%	2 of 3	2.4 h	2 days
935	Stronghurst 0.4 SSWIL-HD-1	87.5	Volunteer	Henderson	66.6%	2 of 3	2.4 h	2 days
936	Lincoln 6.4 NEIL-LG-19	87.5	Volunteer	Logan	66.6%	2 of 3	2.4 h	36 h
936	Winthrop Harbor 1.7 WIL-LK-143	87.5	Volunteer	Lake	66.6%	2 of 3	2.4 h	36 h
938	Donovan 5.8 SEIL-IR-29	87.5	Volunteer	Iroquois	66.6%	2 of 3	2.4 h	36 h
938	Elmwood 0.4 WIL-PR-20	87.5	Volunteer	Peoria	66.6%	2 of 3	2.4 h	36 h
938	Joliet 0.7 WNWIL-WL-175	87.5	Volunteer	Will	66.6%	2 of 3	2.4 h	36 h
938	Manhattan 1.9 SEIL-WL-99	87.5	Volunteer	Will	66.6%	2 of 3	2.4 h	36 h
942	Urbana 0.9 WSWIL-CP-133	87.5	Volunteer	Champaign	66.6%	2 of 3	2.4 h	33 h
943	Winfield 0.8 ENEIL-DP-177	87.5	Volunteer	DuPage	66.6%	2 of 3	2.4 h	35 h
943	Chatham 1.4 ESEIL-SG-11	87.5	Volunteer	Sangamon	66.6%	2 of 3	2.4 h	35 h
945	Homer 0.5 NNEIL-CP-181	87.5	Volunteer	Champaign	66.6%	2 of 3	2.4 h	36 h
945	Yorkville 1.71 SSEIL-KD-142	87.5	Volunteer	Kendall	66.6%	2 of 3	2.4 h	36 h
945	Huntley 1.1 ESEIL-MCH-120	87.5	Volunteer	McHenry	66.6%	2 of 3	2.4 h	36 h
945	Mokena 1.3 WIL-WL-42	87.5	Volunteer	Will	66.6%	2 of 3	2.4 h	36 h
945	Okawville 2.3 SWIL-WS-3	87.5	Volunteer	Washington	66.6%	2 of 3	2.4 h	36 h
950	Cortland 0.3 SSWIL-DK-5	87.5	Volunteer	De Kalb	66.6%	2 of 3	2.4 h	37 h
950	Mokena 4.4 WNWIL-WL-180	87.5	Volunteer	Will	66.6%	2 of 3	2.4 h	37 h
952	Harwood Heights 0.6 NEIL-CK-474	87.5	Volunteer	Cook	66.6%	2 of 3	2.4 h	2 days
953	Cairo 0.8 NIL-AL-2	87.5	Volunteer	Alexander	66.6%	2 of 3	2.4 h	3 days
954	Algonquin 1.3 SEIL-KN-140	87.5	Volunteer	Kane	66.6%	2 of 3	2.4 h	34 h
955	Kankakee 1.4 WSWIL-KK-45	87.5	Volunteer	Kankakee	66.6%	2 of 3	2.4 h	37 h
955	Plainfield 3.9 SSWIL-WL-182	87.5	Volunteer	Will	66.6%	2 of 3	2.4 h	37 h
957	Highwood 0.9 SIL-LK-69	87.5	Volunteer	Lake	66.6%	2 of 3	2.4 h	36 h
958	Casey Fork Subimpoundment AT BonnieBONI2	87.2	Gauge	Jefferson	99.1%	333 of 336	25 min	1.5 h
959	Chicago - Chicago River at LockLCRI2	87.2	Gauge	Cook	87.1%	488 of 560	28 min	3.1 h
960	JacksonvilleJAXI2	87.2	Cooperative	Morgan	71.4%	5 of 7	6.5 h	37.5 h
961	Carol Stream 0.3 SSEIL-DP-42	87.0	Volunteer	DuPage	66.6%	2 of 3	3.4 h	36 h
961	St. Charles 0.8 SSEIL-KN-150	87.0	Volunteer	Kane	66.6%	2 of 3	3.4 h	36 h
961	Lawrenceville 1.4 WIL-LW-3	87.0	Volunteer	Lawrence	66.6%	2 of 3	3.4 h	36 h
964	Mahomet 1.6 EIL-CP-139	87.0	Volunteer	Champaign	66.6%	2 of 3	3.4 h	37 h
965	Lake Forest 2.1 NNEIL-LK-22	87.0	Volunteer	Lake	66.6%	2 of 3	3.4 h	35 h
966	Quincy 2.7 NIL-AD-21	87.0	Volunteer	Adams	66.6%	2 of 3	3.4 h	36 h
966	Bloomington 1.5 ESEIL-MCL-48	87.0	Volunteer	McLean	66.6%	2 of 3	3.4 h	36 h
966	El Paso 5.2 NNWIL-WF-14	87.0	Volunteer	Woodford	66.6%	2 of 3	3.4 h	36 h
966	East Peoria 6.9 NNEIL-WF-28	87.0	Volunteer	Woodford	66.6%	2 of 3	3.4 h	36 h
970	Genoa 1.5 SWIL-DK-44	87.0	Volunteer	De Kalb	66.6%	2 of 3	3.4 h	35 h
971	Kankakee 3.9 WNWIL-KK-55	86.5	Volunteer	Kankakee	66.6%	2 of 3	4.4 h	27 h
972	Aurora 3.8 SEIL-DP-101	86.5	Volunteer	DuPage	66.6%	2 of 3	4.4 h	36 h
972	Wadsworth 0.6 SSEIL-LK-140	86.5	Volunteer	Lake	66.6%	2 of 3	4.4 h	36 h
972	Davis 1.5 NNEIL-SP-32	86.5	Volunteer	Stephenson	66.6%	2 of 3	4.4 h	36 h
975	Princeton 1.0 SSWIL-BU-15	86.5	Volunteer	Bureau	66.6%	2 of 3	4.4 h	36 h
975	Teutopolis 3.4 SEIL-EF-9	86.5	Volunteer	Effingham	66.6%	2 of 3	4.4 h	36 h
975	Rockford 1.3 NNWIL-WN-61	86.5	Volunteer	Winnebago	66.6%	2 of 3	4.4 h	36 h
978	ChicagoCHUI2	86.4	Gauge	Cook	95.8%	322 of 336	44 min	3 h
979	WinnetkaWNKI2	86.3	Gauge	Cook	96.1%	323 of 336	44 min	3 h
980	WestchesterWBRI2	86.3	Gauge	Cook	95.2%	320 of 336	44 min	3 h
981	Romeoville - Chicago SanitaryROMI2	86.2	Gauge	Will	91.6%	308 of 336	45 min	4 h
982	Evanston 0.9 SIL-CK-321	86.1	Volunteer	Cook	66.6%	2 of 3	5.4 h	3 days
983	Jerseyville 3.4 SWIL-JR-3	86.1	Volunteer	Jersey	66.6%	2 of 3	5.4 h	2 days
984	Chicago 5.9 SWIL-CK-438	86.1	Volunteer	Cook	66.6%	2 of 3	5.4 h	35 h
984	Earlville 2.5 SSWIL-LS-74	86.1	Volunteer	La Salle	66.6%	2 of 3	5.4 h	35 h
984	Monticello 3.5 NNEIL-PT-1	86.1	Volunteer	Piatt	66.6%	2 of 3	5.4 h	35 h
987	Jacksonville 4.6 NIL-MG-17	86.1	Volunteer	Morgan	66.6%	2 of 3	5.4 h	36 h
988	Midlothian 1.2 SEIL-CK-260	86.1	Volunteer	Cook	66.6%	2 of 3	5.4 h	35 h
989	Fairview 2.0 SEIL-FL-16	86.1	Volunteer	Fulton	66.6%	2 of 3	5.4 h	36 h
990	Chicago - Chicago River at Columbus DrNBCI2	86.0	Gauge	Cook	80.8%	453 of 560	29 min	2.1 h
991	ChicagoCBBI2	85.9	Gauge	Cook	96.1%	323 of 336	44 min	3 h
992	Franklin ParkCFKI2	85.7	Gauge	Cook	95.5%	321 of 336	44 min	3.5 h
993	Effingham 2.3 WNWIL-EF-6	85.6	Volunteer	Effingham	66.6%	2 of 3	6.4 h	2 days
994	Atkinson 2.6 NNEIL-HY-4	85.6	Volunteer	Henry	66.6%	2 of 3	6.4 h	35 h
995	Mahomet 3.0 NEIL-CP-136	85.6	Volunteer	Champaign	66.6%	2 of 3	6.4 h	36 h
996	Evanston 0.8 ESEIL-CK-336	85.6	Volunteer	Cook	66.6%	2 of 3	6.4 h	35 h
996	Champaign 0.3 NNEIL-CP-143	85.6	Volunteer	Champaign	66.6%	2 of 3	6.4 h	35 h
998	SkokieSKOI2	85.2	Gauge	Cook	95.2%	320 of 336	44 min	3.5 h
999	Alsip - ISWS Lake MichiganALSI2	85.1	Gauge	Cook	95.8%	322 of 336	44 min	3 h
1,000	HarveyHRVI2	85.1	Gauge	Cook	95.2%	320 of 336	44 min	3 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.