Radar

FLOOD WARNING

FLOOD WARNING ISSUED APRIL 18 AT 8:40PM CDT

Effective: 2026-04-18 20:40:00 Local Time [EXPIRED] Expires: 2026-04-19 14:45:00 Local Time Issued by: NWS Chicago IL

Alert Text

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS INILLINOIS...

FOX RIVER AT DAYTON AFFECTING LA SALLE COUNTY.

FOX RIVER AT MONTGOMERY AFFECTING KANE AND KENDALL COUNTIES.

FOX RIVER AT ALGONQUIN LOCK & DAM TAILWATER AFFECTING KANE, MCHENRY AND LAKE IL COUNTIES.

* WHAT...MODERATE FLOODING IS OCCURRING AND FORECASTED TO CONTINUE.

* WHERE...FOX RIVER FROM JOHNSBURG DOWNSTREAM TO RED GATE ROAD IN ST. CHARLES, INCLUDING THE ALGONQUIN LOCK & DAM TAILWATER GAUGE.

* WHEN...UNTIL FURTHER NOTICE.

* IMPACTS...AT 12.0 FEET, STRUCTURES THREATENED ALONG RIVER STREET, JOHNSON STREET, AND MAIDEN LANE IN EAST DUNDEE. NORTH HARRISON STREET THREATENED NEAR RIVERSIDE PARK IN ALGONQUIN. WASHINGTON STREET THREATENED IN CARPENTERSVILLE. WATER STREET, EDWARDS AVENUE, AND ELGIN AVENUE THREATENED IN EAST DUNDEE. BAYVIEW ROAD THREATENED IN ELGIN. LOW-LYING AREAS OF FESTIVAL PARK ARE THREATENED IN ELGIN.

* ADDITIONAL DETAILS... - AT 7:30 PM CDT SATURDAY THE STAGE WAS 11.2 FEET. - FORECAST...THE RIVER IS EXPECTED TO CONTINUE GRADUALLY RISING INTO NEXT WEEK. AT THIS POINT, IT IS EXPECTED TO REMAIN JUST BELOW MAJOR FLOOD STAGE. - FLOOD STAGE IS 9.5 FEET. - HTTP: WWW.WEATHER.GOV SAFETY FLOOD

More Information

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Target Area

KANE, IL, LAKE, IL, MCHENRY, IL

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Storm Reports

Local Time ▼	Location ⇅	Event ⇅	Detail	Source ⇅
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Hazardous Weather Conditions

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

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
Time	Wind (mph)	Vis (mi)	Weather	Precip (in)	Air	Dwpt	Relative Humidity	Wind Chill (F)	Heat Index (F)	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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