Storm Station
Walnut, Iowa
64°
Light rain· Feels like 64°·Light breeze 7 mph SE
A slight chance of rain showers. Mostly cloudy. Low around 62, with temperatures rising to around 64 overnight. Southeast wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
-UV
-Air quality
100%Humidity
87%Cloud

What is measuring near here

The 5 instruments nearest Walnut, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.8 miles away.

measured now3 instruments

Avoca (I-80)RAVI4

Beside a road/3.8 mi away/1,237 ft/109 ft below here

temp, pavement temp, wind, visibility, precip

Rank571of 652

HarlanHNR

At an airfield/9.3 mi away/1,194 ft/152 ft below here

temp, wind, gust, visibility, precip, pressure

Rank242of 652

Irwin 3 ESEIRWI4

At a river or reservoir gauge/20.4 mi away/1,322 ft/24 ft below here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

Lewis 3.7 NWIA-CS-8

In a volunteer observer's own ground/10.3 mi away/1,135 ft/211 ft below here

precip, snowfall, snow depth

Rank-

Atlantic 1 NEATLI4

At a cooperative observer's station/12.1 mi away/1,168 ft/178 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Harlan, drawn

The nearest airport reporting now, 9.3 mi from Walnut. From its report of Sep 27, 2026, 3:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 700 ft; the ceiling is 700 ft; visibility 10 mi or more.

Section of the sky over Harlan, height above the station to scale: overcast cloud with its base at 700 feet, the ceiling at 700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HNRFIG. A THE SKY OVER HARLANSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 700 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEHarlan, the skySTATION REPORT · ASOS HNRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-HNR-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

64.4 F with a dew point of 64.4 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 700 ft.

Chart of the air at Harlan: temperature 64.4 degrees Fahrenheit and dew point 64.4, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HNRFIG. B THE AIR AT HARLANTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 F80 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 700 FTTEMPERATURE AND DEW POINT 64.4 F, 64.4 FRELATIVE HUMIDITY 100 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEHarlan, the airSTATION REPORT · ASOS HNRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-HNR-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (160 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Harlan, north up: blowing from 160 degrees, the south southeast, at 7 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HNRFIG. C THE WIND AT HARLANPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 160°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEHarlan, the windSTATION REPORT · ASOS HNRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-HNR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Harlan, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Iowa

15 places, each with its own forecast and its own instruments.

Near Walnut

The nearest places, each with its own forecast and the instruments nearest it.