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FLOOD WARNING
FLOOD WARNING ISSUED APRIL 17 AT 1:46PM CDT
Effective: 2026-04-17 13:46:00 Local Time [EXPIRED] Expires: 2026-04-18 08:00:00 Local Time Issued by: NWS Chicago IL
Alert Text
...THE NATIONAL WEATHER SERVICE IN CHICAGO IL HAS ISSUED A FLOODWARNING FOR THE FOLLOWING RIVERS IN ILLINOIS...

ILLINOIS RIVER AT LA SALLE AFFECTING LA SALLE, BUREAU AND PUTNAM COUNTIES.

FOR THE ILLINOIS RIVER (UPPER)...INCLUDING OTTAWA, LA SALLE...MINOR FLOODING IS FORECAST.

* WHAT...MINOR FLOODING IS FORECAST.

* WHERE...ILLINOIS RIVER FROM STARVED ROCK LOCK AND DAM DOWNSTREAM TO CONFLUENCE WITH BIG BUREAU CREEK, INCLUDING THE LA SALLE GAUGE.

* WHEN...FROM SATURDAY MORNING UNTIL FURTHER NOTICE.

* IMPACTS...AT 22.0 FEET, LOWER PARKING LOT AT STARVED ROCK STATE PARK IS INUNDATED EAST OF LA SALLE. HIGH WATER LEVELS BEGIN TO IMPACT SHIPPING INTERESTS ALONG THE RIVER.

* ADDITIONAL DETAILS... - AT 12:45 PM CDT FRIDAY THE STAGE WAS 19.5 FEET. - FORECAST...THE RIVER IS EXPECTED TO RISE ABOVE FLOOD STAGE LATE TOMORROW MORNING AND CONTINUE RISING TO A CREST OF 23.2 FEET MONDAY MORNING. - FLOOD STAGE IS 20.0 FEET. - HTTP: WWW.WEATHER.GOV SAFETY FLOOD
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Target Area
BUREAU, IL, LA SALLE, IL, PUTNAM, IL

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Hazardous Weather Conditions

No active alerts for CHEVY CHASE, MARYLAND

Current Conditions: CHEVY CHASE, MARYLAND

LEESBURG/GODFREY (KJYO)

Clear

50.0 F
Humidity:58%
Wind Speed:S 5.8 mph
Barometer:30.05 in
Dewpoint:35.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 05:15 AM EDT
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5 Day Forecast for CHEVY CHASE, MARYLAND (20815)

Wednesday

High 73 °F
Chance of T-storms
Wednesday
Night
Low 55 °F
Partly Cloudy
Thursday

High 80 °F
Mostly Sunny
Thursday
Night
Low 57 °F
Partly Cloudy
Friday

High 77 °F
Chance of T-storms
Friday
Night
Low 53 °F
Chance of Rain
Saturday

High 62 °F
T-storms Likely
Saturday
Night
Low 48 °F
Rain
Sunday

High 62 °F
Rain Showers Likely

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)
05:15 AM EDT S 5.8 10.00 Clear -- 50.0 35.6 58% NA NA 30.05 1017.6
04:55 AM EDT S 9.2 10.00 Clear -- 50.0 35.6 58% NA NA 30.05 1017.6
04:35 AM EDT S 8.1 10.00 Clear -- 50.0 35.6 58% NA NA 30.06 1018.0
04:15 AM EDT S 8.1 10.00 Clear -- 50.0 35.6 58% NA NA 30.07 1018.3
03:55 AM EDT S 8.1 10.00 Clear -- 50.0 35.6 58% NA NA 30.08 1018.6
03:35 AM EDT S 8.1 10.00 Clear -- 50.0 35.6 58% NA NA 30.08 1018.6
03:15 AM EDT S 8.1 10.00 Clear -- 50.0 35.6 58% NA NA 30.08 1018.6
02:55 AM EDT S 8.1 10.00 Clear -- 50.0 35.6 58% NA NA 30.09 1019.0
02:35 AM EDT S 6.9 10.00 Clear -- 50.0 35.6 58% NA NA 30.10 1019.3
02:15 AM EDT S 6.9 10.00 Clear -- 50.0 37.4 62% NA NA 30.10 1019.3
01:35 AM EDT 4.7 10.00 Clear -- 51.8 37.4 58% NA NA 30.13 1020.3
01:15 AM EDT 3.4 10.00 Clear -- 51.8 37.4 58% NA NA 30.14 1020.7
12:55 AM EDT 3.4 10.00 Clear -- 51.8 37.4 58% NA NA 30.15 1021.0
12:35 AM EDT S 3.4 10.00 Clear -- 51.8 37.4 58% NA NA 30.15 1021.0
12:15 AM EDT 3.4 10.00 Clear -- 51.8 37.4 58% NA NA 30.15 1021.0
11:55 PM EDT SE 3.4 10.00 Clear -- 53.6 37.4 54% NA NA 30.16 1021.3
11:35 PM EDT SE 4.7 10.00 Clear -- 53.6 37.4 54% NA NA 30.16 1021.3
11:15 PM EDT SE 4.7 10.00 Clear -- 53.6 37.4 54% NA NA 30.17 1021.7
10:55 PM EDT SE 5.8 10.00 Clear -- 53.6 37.4 54% NA NA 30.17 1021.7
10:35 PM EDT 8.1 10.00 Clear -- 53.6 37.4 54% NA NA 30.18 1022.0
10:15 PM EDT 6.9 10.00 Clear -- 55.4 35.6 47% NA NA 30.18 1022.0
09:55 PM EDT 9.2 10.00 Clear -- 55.4 35.6 47% NA NA 30.18 1022.0
09:35 PM EDT SE 11.4 10.00 Clear -- 57.2 32.0 38% NA NA 30.18 1022.0
09:15 PM EDT 6.9 10.00 Clear -- 59.0 32.0 36% NA NA 30.18 1022.0

Regional Weather Observation

LEESBURG/GODFREY (KJYO)

Clear
50.0 F

FREDERICK (KFDK)

Mostly Cloudy
45.1 F

CARROLL CNTY (KDMW)

Partly Cloudy
51.8 F

NSF THURMONT (KRSP)

Clear
48.0 F

WASH DC/DULLES (KIAD)

Clear
51.8 F

WASHINGTON/NATL (KDCA)

Clear
51.8 F
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