Storm Station
Waterloo, Illinois
57° 75°/58°
Overcast· Feels like 57°·Light air 2 mph WNW
Cloudy, with a low around 57. Wind around 0 mph.
0UV Low
-Air quality
83%Humidity
100%Cloud
Now
4:00 AM
57feels57
now, overcast
Today
Sep 27
7558
15%
overcast
Mon
Sep 28
7759
overcast
Tue
Sep 29
8957
overcast
Wed
Sep 30
9165
17mph
overcast
Thu
Oct 1
7668
54%
thunderstorm
Fri
Oct 2
6654
50%
13mph
showers light
Sat
Oct 3
5953
35%
drizzle
57°
75°58°
77°59°
89°57°
91°65°
76°68°
66°54°
59°53°

As of 4:00 AM in Waterloo, Illinois.

What is measuring near here

The 4 instruments nearest Waterloo, 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 now2 instruments

Cahokia/St LouisCPS

At an airfield/16.2 mi away/413 ft/273 ft below here

temp, wind, gust, visibility, precip, pressure

Rank12of 417

measured daily2 instruments

WaterlooWTRI2

At a cooperative observer's station/0.2 mi away/702 ft/16 ft above here

snowfall, snow depth, precip, high, low

Rank-

Waterloo 2.9 ENEIL-MO-10

In a volunteer observer's own ground/2.6 mi away/593 ft/93 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Cahokia/St Louis, drawn

The nearest airport reporting now, 16.2 mi from Waterloo. From its report of Sep 27, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

Scattered at 11,000 ft; visibility 10 mi or more.

Section of the sky over Cahokia/St Louis, height above the station to scale: scattered cloud with its base at 11,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. A THE SKY OVER CAHOKIA/ST LOUISSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,500ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTSCT 11,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLECahokia/St Louis, the skySTATION REPORT · ASOS CPSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-CPS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

59.0 F with a dew point of 58.0 F, 96 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 11,000 ft.

Chart of the air at Cahokia/St Louis: temperature 59.0 degrees Fahrenheit and dew point 58.0, 96 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 11,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. B THE AIR AT CAHOKIA/ST LOUISTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00050 F60 F70 FSATURATES 200 FT ABOVE THE STATION, AT 57.7 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, SCT 11,000 FTTEMPERATURE AND DEW POINT 59.0 F, 58.0 FRELATIVE HUMIDITY 96 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 POINTTITLECahokia/St Louis, the airSTATION REPORT · ASOS CPSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-CPS-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Cahokia/St Louis, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. C THE WIND AT CAHOKIA/ST LOUISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECahokia/St Louis, the windSTATION REPORT · ASOS CPSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-CPS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Cahokia/St Louis, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Illinois

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

Near Waterloo

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