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FLOOD WATCH
FLOOD WATCH ISSUED APRIL 15 AT 9:07PM CDT UNTIL APRIL 20 AT 4:00PM CDT
Effective: 2026-04-15 21:07:00 Local Time Expires: 2026-04-20 16:00:00 Local Time Issued by: NWS Chicago IL
Alert Text
...THE FLOOD WATCH CONTINUES FOR THE FOLLOWING RIVERS IN ILLINOIS... ROCK RIVER AT LATHAM PARK AFFECTING WINNEBAGO COUNTY.

ROCK RIVER AT ROCKTON AFFECTING WINNEBAGO COUNTY.

ROCK RIVER AT BYRON AFFECTING OGLE AND WINNEBAGO COUNTIES.

FOR THE ROCK RIVER...INCLUDING ROCKTON, LATHAM PARK, BYRON... FLOODING IS POSSIBLE.

* WHAT...FLOODING IS POSSIBLE.

* WHERE...ROCK RIVER FROM CONFLUENCE WITH KISHWAUKEE RIVER TO CASTLE ROCK STATE PARK NEAR OREGON, INCLUDING THE BYRON GAUGE.

* WHEN...FROM LATE THURSDAY NIGHT TO MONDAY AFTERNOON.

* IMPACTS...AT 13.5 FEET, NUMEROUS LOW-LYING STRUCTURES DOWNSTREAM OF BYRON ARE FLOODED.

* ADDITIONAL DETAILS... - AT 8:15 PM CDT WEDNESDAY THE STAGE WAS 10.3 FEET. - FORECAST...FLOOD STAGE MAY BE REACHED LATE FRIDAY MORNING. - FLOOD STAGE IS 13.0 FEET. - HTTP: WWW.WEATHER.GOV SAFETY FLOOD
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Target Area
WINNEBAGO, OGLE
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Hazardous Weather Conditions

Freeze Watch issued April 18 at 11:59PM EDT until April 21 at 10:00AM EDT

Current Conditions: CHEVY CHASE, MARYLAND

LEESBURG/GODFREY (KJYO)

Cloudy

62.6 F
Humidity:94%
Wind Speed:NE 3.4 mph
Barometer:29.79 in
Dewpoint:60.8 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 19 2026, 03:35 AM EDT
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5 Day Forecast for CHEVY CHASE, MARYLAND (20815)

Sunday

High 59 °F
Rain Showers Likely
Sunday
Night
Low 42 °F
Partly Cloudy
Monday

High 55 °F
Partly Sunny
Monday
Night
Low 33 °F
Mostly Clear
Tuesday

High 59 °F
Mostly Sunny
Tuesday
Night
Low 48 °F
Slight Chance of Rain
Wednesday

High 73 °F
Chance of Rain Showers
Wednesday
Night
Low 50 °F
Partly Cloudy
Thursday

High 77 °F
Mostly Sunny

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)
03:35 AM EDT NE 3.4 10.00 Cloudy -- 62.6 60.8 94% NA NA 29.79 1008.8
03:15 AM EDT 0.0 7.00 Light Rain -- 62.6 60.8 94% NA NA 29.79 1008.8
02:55 AM EDT 3.4 10.00 Cloudy -- 62.6 60.8 94% NA NA 29.81 1009.2
02:35 AM EDT 0.0 10.00 Cloudy -- 62.6 60.8 94% NA NA 29.81 1009.5
02:15 AM EDT 3.4 10.00 Light Rain -- 64.4 60.8 88% NA NA 29.81 1009.5
01:55 AM EDT NE 5.8 10.00 Cloudy -- 66.2 60.8 83% NA NA 29.82 1009.8
01:35 AM EDT 10.3 10.00 Cloudy -- 68.0 60.8 78% NA NA 29.83 1010.2
01:15 AM EDT 3.4 10.00 NULL -- 68.0 60.8 78% NA NA 29.84 1010.5
12:55 AM EDT 0.0 10.00 Cloudy -- 66.2 60.8 83% NA NA 29.85 1010.8
12:35 AM EDT 0.0 10.00 Cloudy -- 68.0 60.8 78% NA NA 29.85 1010.8
12:15 AM EDT 0.0 10.00 NULL -- 68.0 60.8 78% NA NA 29.86 1011.2
11:55 PM EDT E 4.7 10.00 Cloudy -- 68.0 60.8 78% NA NA 29.84 1010.5
11:35 PM EDT E 3.4 10.00 Light Rain -- 69.8 60.8 73% NA NA 29.85 1010.8
11:15 PM EDT E 4.7 10.00 NULL -- 69.8 60.8 73% NA NA 29.85 1010.8
10:55 PM EDT 4.7 10.00 Cloudy -- 69.8 60.8 73% NA NA M
10:35 PM EDT 5.8 10.00 Mostly Cloudy -- 69.8 60.8 73% NA NA 29.83 1010.2
10:15 PM EDT SE 5.8 10.00 Mostly Cloudy -- 69.8 60.8 73% NA NA 29.82 1009.8
09:55 PM EDT SE 10.3 10.00 Clear -- 69.8 60.8 73% NA NA 29.82 1009.8
09:35 PM EDT SE 9.2 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.83 1010.2
09:15 PM EDT SE 11.4 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.82 1009.8
08:55 PM EDT SE 11.4 G 23.0 10.00 Clear -- 71.6 60.8 69% NA 71.8 29.82 1009.8
08:35 PM EDT SE 13.9 G 20.8 10.00 Clear -- 73.4 60.8 65% NA 73.4 29.81 1009.5
08:15 PM EDT SE 9.2 G 18.3 10.00 Clear -- 73.4 60.8 65% NA 73.4 29.81 1009.2
07:55 PM EDT SE 15.0 G 20.8 10.00 Clear -- 75.2 60.8 61% NA 75.2 29.81 1009.2

Regional Weather Observation

LEESBURG/GODFREY (KJYO)

Cloudy
62.6 F

FREDERICK (KFDK)

Light Rain and Fog/Mist
60.3 F

CARROLL CNTY (KDMW)

Rain
60.8 F

NSF THURMONT (KRSP)

Light Rain
57.0 F

WASH DC/DULLES (KIAD)

Mostly Clear
62.6 F

WASHINGTON/NATL (KDCA)

Clear
60.8 F
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