Storm Station
Sully, Iowa
59°
Light rain· Feels like 59°·Light breeze 7 mph SE
Rain showers before 7am, then drizzle between 7am and 1pm. Mostly cloudy. High near 67, with temperatures falling to around 65 in the afternoon. East southeast wind around 5 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
-UV
-Air quality
84%Humidity
99%Cloud

What is measuring near here

The 6 instruments nearest Sully, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

GrinnellRGII4

Beside a road/8.7 mi away/868 ft/51 ft below here

temp, pavement temp, wind, visibility, precip

Rank18of 652

GrinnellGGI

At an airfield/10.7 mi away/1,007 ft/88 ft above here

temp, wind, gust, visibility, precip, pressure

Rank210of 652

Red Rock DamRRMI4

At a dam/16.1 mi away/722 ft/197 ft below here

temp, wind, gust, humidity, pressure

Rank198of 652

Des Moines 17 E54902

At a climate reference station/22.8 mi away/903 ft/16 ft below here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Sully 0.3 ESEIA-JS-10

In a volunteer observer's own ground/0.2 mi away/914 ft/5 ft below here

precip, snowfall, snow depth

Rank-

Pella 1 SPEAI4

At a cooperative observer's station/8.6 mi away/761 ft/158 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Grinnell, drawn

The nearest airport reporting now, 10.7 mi from Sully. From its report of Sep 27, 2026, 5:55 AM local time: 3 of its 6 sheets.

The sky

Broken at 600 ft, overcast at 3,500 ft; the ceiling is 600 ft; visibility 10 mi or more.

Section of the sky over Grinnell, height above the station to scale: broken cloud with its base at 600 feet, overcast cloud with its base at 3,500 feet, the ceiling at 600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GGIFIG. A THE SKY OVER GRINNELLSECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,500 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEGrinnell, the skySTATION REPORT · ASOS GGITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-GGI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

56.0 F with a dew point of 55.8 F, 99 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 100 ft up; the lowest cloud reported is at 600 ft.

Chart of the air at Grinnell: temperature 56.0 degrees Fahrenheit and dew point 55.8, 99 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 100 feet above the station, against the lowest cloud reported at 600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GGIFIG. B THE AIR AT GRINNELLTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 100 FT ABOVE THE STATION, AT 55.7 FLOWEST CLOUD REPORTED, BKN 600 FTTEMPERATURE AND DEW POINT 56.0 F, 55.8 FRELATIVE HUMIDITY 99 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 POINTTITLEGrinnell, the airSTATION REPORT · ASOS GGITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-GGI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east (100 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Grinnell, north up: blowing from 100 degrees, the east, at 5 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 GGIFIG. C THE WIND AT GRINNELLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 100°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGrinnell, the windSTATION REPORT · ASOS GGITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-GGI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Pella 1 S (PEAI4), 8.6 miles from here, read 26 Sep, 07:00. measured daily

Elsewhere in Iowa

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

Near Sully

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