Alert archive / Illinois / Areal Flood Warnings in 2011

Areal Flood Warning 9, NWS Quad Cities, IA

July 28, 2011Carroll County, Jo Daviess County, Stephenson County, Illinois

NWS Quad Cities, IA issued this areal flood warning at Jul 28, 2011, 3:39 PM CDT for Carroll County, Jo Daviess County, Stephenson County, Illinois. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 28, 2011, 3:39 PM CDT (20:39 UTC)
Expired: Jul 28, 2011, 9:30 PM CDT
In force: 6 hr
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

Counties Carroll County, IL, Jo Daviess County, IL, Stephenson County, IL

The radar

The Quad Cities radar (KDVN), 90 km from the middle of the area, began a volume at 20:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this areal flood warning went out at Jul 28, 11:55 AM CDT, 3 hours 44 minutes earlier.

Area forecast discussion, Jul 28, 11:55 AM CDT, 3 hours 44 minutes before

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Hazardous weather outlook, Jul 28, 5:07 AM CDT, 10 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
507 AM CDT THU JUL 28 2011

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-291015-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
507 AM CDT THU JUL 28 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WITH HEAVY RAIN ARE LIKELY OVER ESPECIALLY THE
NORTHERN HALF OF THE OUTLOOK AREA TODAY THROUGH THIS EVENING. THIS
MAY LEAD TO FLASH FLOODING...ESPECIALLY ALONG THE HIGHWAY 20
CORRIDOR WHERE CONDITIONS ARE SATURATED FROM OVERNIGHT HEAVY
RAINFALL. A FLASH FLOOD WATCH IS IN EFFECT UNTIL MIDNIGHT TONIGHT
FOR THE AREA ROUGHLY NORTH OF A LINE FROM STERLING ILLINOIS TO
BELLE PLAINE IOWA.

THERE WILL ALSO BE A POTENTIAL FOR SEVERE THUNDERSTORMS TODAY AND
TONIGHT. THE PRIMARY THREAT WILL BE DAMAGING WINDS UP TO 70 MPH.
SOME STORMS MAY ALSO BE CAPABLE OF PRODUCING LARGE HAIL...AND
CONDITIONS MAY BE FAVORABLE FOR BRIEF TORNADOES ALONG BOUNDARIES.

VERY WARM AND HUMID CONDITIONS WILL REMAIN IN PLACE TODAY...
POSSIBLY RESULTING IN AFTERNOON HEAT INDEX VALUES FROM 100 TO
NEAR 107 SOUTH OF INTERSTATE 80.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

FRIDAY...THUNDERSTORMS WILL BE POSSIBLE MAINLY SOUTH OF INTERSTATE
80. SEVERE WEATHER IS NOT EXPECTED.

THUNDERSTORMS ARE POSSIBLE AGAIN TUESDAY AND WEDNESDAY. IT IS TOO
SOON TO DETERMINE THE POTENTIAL FOR SEVERE WEATHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT.

DLS

In the hours before

Special weather statement, Jul 28, 9:40 AM CDT, 5 hours 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
940 AM CDT THU JUL 28 2011

IAZ067-068-ILZ009-015-281530-
SCOTT IA-MUSCATINE IA-ROCK ISLAND IL-WHITESIDE IL-
940 AM CDT THU JUL 28 2011

...THUNDERSTORMS WITH HEAVY RAIN...

AT 935 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS MOVING ACROSS MUSCATINE...SCOTT...ROCK ISLAND...AND
WHITESIDE COUNTIES. THESE STORMS WERE MOVING EAST NORTHEAST AT
AROUND 35 MPH.

RADAR ESTIMATES BETWEEN ONE HALF AND ONE INCH OF RAIN HAS FALLEN IN
THE PAST HOUR. RADAR TRENDS SUGGEST AN ADDITIONAL HALF INCH TO ONE
INCH IS POSSIBLE THROUGH 11 AM.

EXPECT PONDING OF WATER ON ROADS AND IN LOW-LYING AREAS...AND RISES
IN AREA STREAMS AND CREEKS. DUCK AND BLACK HAWK CREEKS IN SCOTT
COUNTY MAY SEE SIGNIFICANT RISES FROM THIS RAIN.

&&

LAT...LON 4159 9018 4154 9020 4152 9033 4146 9043
      4132 9044 4134 9137 4160 9136 4160 9090
      4168 9090 4176 9045 4173 9041 4173 9032
      4181 9018 4193 9015 4193 8963 4159 8963

08

Local storm report, Jul 28, 11:19 AM CDT, 4 hours 20 minutes before

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Local storm report, Jul 28, 11:57 AM CDT, 3 hours 42 minutes before

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Local storm report, Jul 28, 12:03 PM CDT, 3 hours 36 minutes before

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Local storm report, Jul 28, 12:07 PM CDT, 3 hours 32 minutes before

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The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 27, 7:10 PM CDT	Flash Flood Warning	DVN	Dubuque, Jackson	9 hr
Jul 27, 7:35 PM CDT	Tornado Warning	DVN	Dubuque, Jackson	40 min
Jul 27, 8:29 PM CDT	Tornado Warning	DVN	Dubuque, Jackson	46 min
Jul 27, 9:16 PM CDT	Tornado Warning	DVN	Jackson	31 min
Jul 27, 11:55 PM CDT	Flash Flood Warning	DVN	Jackson	4 hr
Jul 28, 12:50 AM CDT	Special Weather Statement	DVN	Delaware, Dubuque, Jackson	55 min
Jul 28, 1:13 AM CDT	Flash Flood Warning	DVN	Buchanan, Delaware	5 hr
Jul 28, 4:10 AM CDT	Areal Flood Warning	DVN	Delaware, Dubuque, Jackson, Jones	12 hr
Jul 28, 9:26 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware, Linn	64 min
Jul 28, 9:40 AM CDT	Special Weather Statement	DVN	Muscatine, Scott	50 min
Jul 28, 10:15 AM CDT	River Flood Warning	DVN	Dubuque, Jackson	6 hr
Jul 28, 10:15 AM CDT	River Flood Warning	DVN	Jackson	6 hr
Jul 28, 12:03 PM CDT	Heat Advisory	DVN	Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 2 more	10 hr
Jul 27, 7:51 PM CDT	Tornado Warning	DVN	Jo Daviess, Stephenson	39 min
Jul 27, 8:40 PM CDT	Flash Flood Warning	DVN	Stephenson	8 hr
Jul 28, 10:15 AM CDT	River Flood Warning	DVN	Stephenson	43 hr

Nearby

Areal Flood Warnings in Illinois, 2011 Every areal flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.