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FLOOD WARNING
FLOOD WARNING ISSUED APRIL 18 AT 2:20PM CDT UNTIL APRIL 25 AT 1:00PM CDT
Effective: 2026-04-18 14:20:00 Local Time Expires: 2026-04-25 13:00:00 Local Time Issued by: NWS Chicago IL
Alert Text
* WHAT...FLOODING CAUSED BY EXCESSIVE RAINFALL IS EXPECTED. * WHERE...A PORTION OF NORTHEAST ILLINOIS, INCLUDING THE FOLLOWING COUNTIES, LAKE IL AND MCHENRY.

* WHEN...UNTIL 100 PM CDT SATURDAY APR 25.

* IMPACTS...NUMEROUS ROADS, YARDS, STRUCTURES, AND PARK LAND ARE EXPECTED TO FLOOD ALONG THE FOX RIVER CHAIN OF LAKES.

* ADDITIONAL DETAILS... - AT 145 PM CDT, RIVER GAUGES ALONG THE FOX RIVER CHAIN OF LAKES INDICATED SLOWLY RISES WATER LEVELS DUE TO RECENT RAINFALL ACROSS THE AREA. - WATER LEVELS MAY NEAR MAJOR FLOOD STAGE BY THE MIDDLE OF NEXT WEEK AND REMAIN ABOVE FLOOD STAGE POTENTIALLY FOR SEVERAL WEEKS. IMPACTS FROM THIS FLOOD MAY BE SIMILAR TO THOSE EXPERIENCED IN MAY OF 1973, OCTOBER OF 1986, OR JUNE OF 2008. - SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE AREAS ALONG THE FOX RIVER CHAIN OF LAKES, INCLUDING NIPPERSINK LAKE, FOX LAKE, PISTAKEE LAKE, PETITE LAKE, LAKE MARIE, CHANNEL LAKE, AND LAKE CATHERINE. - HTTP: WWW.WEATHER.GOV SAFETY FLOOD
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Target Area
LAKE, IL, MCHENRY, IL
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Hazardous Weather Conditions

Freeze Watch issued April 18 at 11:59PM EDT until April 21 at 10:00AM EDT
Freeze Watch issued April 19 at 8:38AM EDT until April 21 at 10:00AM EDT
Freeze Watch issued April 19 at 1:20PM EDT until April 21 at 10:00AM EDT
Freeze Watch issued April 19 at 9:13PM EDT until April 21 at 10:00AM EDT
Freeze Warning issued April 19 at 11:35PM EDT until April 21 at 10:00AM EDT
Freeze Warning issued April 20 at 8:45AM EDT until April 21 at 10:00AM EDT
Freeze Warning issued April 20 at 2:34PM EDT until April 21 at 10:00AM EDT
Freeze Warning issued April 20 at 5:36PM EDT until April 21 at 10:00AM EDT
Freeze Warning issued April 21 at 1:31AM EDT until April 21 at 10:00AM EDT

Current Conditions: CHEVY CHASE, MARYLAND

LEESBURG/GODFREY (KJYO)

Clear

32.0 F
Humidity:86%
Wind Speed: 0.0 mph
Barometer:30.38 in
Dewpoint:28.4 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 21 2026, 04:15 AM EDT
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5 Day Forecast for CHEVY CHASE, MARYLAND (20815)

Tuesday

High 62 °F
Mostly Sunny
Tuesday
Night
Low 50 °F
Slight Chance of Rain
Wednesday

High 73 °F
T-storms Likely
Wednesday
Night
Low 53 °F
Partly Cloudy
Thursday

High 77 °F
Partly Sunny
Thursday
Night
Low 55 °F
Partly Cloudy
Friday

High 80 °F
Slight Chance of Showers
Friday
Night
Low 55 °F
Chance of Rain
Saturday

High 75 °F
Chance of T-storms

Observation History for CHEVY CHASE, MARYLAND


Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
04:15 AM EDT 0.0 10.00 Clear -- 32.0 28.4 86% NA NA 30.38 1028.8
03:55 AM EDT W 3.4 10.00 Clear -- 32.0 30.2 93% 28.8 NA 30.38 1028.5
03:35 AM EDT W 3.4 10.00 NULL -- 32.0 28.4 86% 28.8 NA 30.38 1028.5
03:15 AM EDT 0.0 10.00 Clear -- 32.0 28.4 86% NA NA 30.36 1028.1
02:55 AM EDT 0.0 10.00 Clear -- 32.0 28.4 86% NA NA 30.36 1028.1
02:35 AM EDT 0.0 10.00 Clear -- 32.0 30.2 93% NA NA 30.36 1028.1
02:15 AM EDT 0.0 10.00 Clear -- 32.0 30.2 93% NA NA 30.36 1028.1
01:55 AM EDT 0.0 10.00 Clear -- 32.0 30.2 93% NA NA 30.38 1028.5
01:35 AM EDT NW 3.4 10.00 Clear -- 32.0 30.2 93% 28.8 NA 30.38 1028.5
01:15 AM EDT 0.0 10.00 Clear -- 33.8 28.4 80% NA NA 30.38 1028.5
12:55 AM EDT 3.4 10.00 Clear -- 33.8 28.4 80% 30.9 NA 30.38 1028.5
12:35 AM EDT 0.0 10.00 Clear -- 35.6 30.2 81% NA NA 30.36 1028.1
12:15 AM EDT 0.0 10.00 Clear -- 35.6 28.4 75% NA NA 30.36 1028.1
11:55 PM EDT 0.0 10.00 Clear -- 35.6 32.0 87% NA NA 30.36 1028.1
11:35 PM EDT 0.0 10.00 Clear -- 37.4 28.4 70% NA NA 30.36 1028.1
11:15 PM EDT 0.0 10.00 Clear -- 37.4 28.4 70% NA NA 30.36 1028.1
10:55 PM EDT 0.0 10.00 Clear -- 37.4 28.4 70% NA NA 30.36 1028.1
10:35 PM EDT 0.0 10.00 Clear -- 41.0 24.8 52% NA NA 30.36 1028.1
10:15 PM EDT 0.0 10.00 Clear -- 41.0 26.6 56% NA NA 30.36 1028.1
09:55 PM EDT 0.0 10.00 Clear -- 41.0 26.6 56% NA NA 30.36 1028.1
09:35 PM EDT 3.4 10.00 Clear -- 42.8 23.0 45% 41.2 NA 30.35 1027.8
09:15 PM EDT 4.7 10.00 Clear -- 44.6 23.0 42% 42.1 NA 30.35 1027.8
08:55 PM EDT 3.4 10.00 Clear -- 44.6 23.0 42% 43.2 NA 30.33 1027.1
08:35 PM EDT 8.1 10.00 Clear -- 44.6 23.0 42% 40.1 NA 30.32 1026.8

Regional Weather Observation

LEESBURG/GODFREY (KJYO)

Clear
32.0 F

FREDERICK (KFDK)

Clear
27.3 F

CARROLL CNTY (KDMW)

Clear
33.8 F

NSF THURMONT (KRSP)

Clear
32.0 F

WASH DC/DULLES (KIAD)

Clear
30.2 F

WASHINGTON/NATL (KDCA)

Clear
37.4 F
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