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FLOOD WARNING
FLOOD WARNING ISSUED APRIL 21 AT 9:01AM CDT UNTIL APRIL 23 AT 1:00AM CDT
Effective: 2026-04-21 09:01:00 Local Time Expires: 2026-04-23 01:00:00 Local Time Issued by: NWS St Louis MO
Alert Text
...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS INMISSOURI...

MERAMEC RIVER NEAR ARNOLD.

RIVER FORECASTS ARE BASED ON OBSERVED PRECIPITATION AND FORECAST PRECIPITATION FOR THE NEXT 24 HOURS.

* WHAT...MINOR FLOODING IS FORECAST.

* WHERE...MERAMEC RIVER NEAR ARNOLD.

* WHEN...UNTIL LATE WEDNESDAY NIGHT.

* IMPACTS...AT 24.0 FEET, CORISANDE HILLS ROAD BEGINS FLOODING AT THIS HEIGHT. MERAMEC BOTTOM ROAD BETWEEN HAGEMANN ROAD AND HIGHWAY 21 BEGINS FLOODING.

* ADDITIONAL DETAILS... - AT 8:30 AM CDT TUESDAY THE STAGE WAS 23.8 FEET. - FORECAST...THE RIVER IS EXPECTED TO RISE TO A CREST OF 24.0 FEET THIS AFTERNOON. IT WILL THEN FALL BELOW FLOOD STAGE THIS EVENING. - FLOOD STAGE IS 24.0 FEET.
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Target Area
JEFFERSON, MO, ST. LOUIS, MO
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Hazardous Weather Conditions

No active alerts for CHEVY CHASE, MARYLAND

Current Conditions: CHEVY CHASE, MARYLAND

LEESBURG/GODFREY (KJYO)

Mostly Cloudy

51.8 F
Humidity:67%
Wind Speed: 0.0 mph
Barometer:30.06 in
Dewpoint:41.0 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 08:35 AM EDT
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5 Day Forecast for CHEVY CHASE, MARYLAND (20815)

Wednesday

High 75 °F
T-storms Likely
Wednesday
Night
Low 55 °F
Partly Cloudy
Thursday

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

High 78 °F
Chance of T-storms
Friday
Night
Low 53 °F
Chance of T-storms
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)
08:35 AM EDT 0.0 10.00 Mostly Cloudy -- 51.8 41.0 67% NA NA 30.06 1018.0
08:15 AM EDT 0.0 10.00 Mostly Cloudy -- 50.0 41.0 71% NA NA 30.06 1018.0
07:55 AM EDT 0.0 10.00 Partly Cloudy -- 50.0 39.2 66% NA NA 30.05 1017.6
07:35 AM EDT 0.0 10.00 Clear -- 50.0 37.4 62% NA NA 30.05 1017.6
07:15 AM EDT 0.0 10.00 Clear -- 50.0 39.2 66% NA NA 30.05 1017.6
06:55 AM EDT 0.0 10.00 Clear -- 50.0 37.4 62% NA NA 30.05 1017.6
06:35 AM EDT 4.7 10.00 Clear -- 50.0 37.4 62% NA NA 30.05 1017.6
06:15 AM EDT S 6.9 10.00 Clear -- 50.0 37.4 62% NA NA 30.05 1017.6
05:55 AM EDT S 5.8 10.00 Clear -- 50.0 37.4 62% NA NA 30.05 1017.6
05:35 AM EDT S 5.8 10.00 Clear -- 50.0 35.6 58% NA NA 30.05 1017.6
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

Regional Weather Observation

LEESBURG/GODFREY (KJYO)

Mostly Cloudy
51.8 F

FREDERICK (KFDK)

Cloudy
44.6 F

CARROLL CNTY (KDMW)

Cloudy
53.6 F

NSF THURMONT (KRSP)

Partly Cloudy
53.1 F

WASH DC/DULLES (KIAD)

Mostly Clear
53.6 F

WASHINGTON/NATL (KDCA)

Clear
55.4 F
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