Alert archive / Iowa / Flash Flood Warnings in 2010

Flash Flood Warning 54, NWS Quad Cities, IA

August 3, 20104 counties in Iowa

NWS Quad Cities, IA issued this flash flood warning at Aug 3, 2010, 1:27 AM CDT for 4 counties in Iowa. 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
Aug 3, 2010, 1:27 AM CDT (06:27 UTC)
Expired
Aug 3, 2010, 7:30 AM CDT
In force
6 hr
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

Counties Iowa County, IA, Johnson County, IA, Keokuk County, IA, Washington County, IA

The radar

The Quad Cities radar (KDVN), 109 km from the middle of the area, began a volume at 06:29 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 flash 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 flash flood warning went out at Aug 2, 9:19 PM CDT, 4 hours 8 minutes earlier.

Area forecast discussion, Aug 2, 9:19 PM CDT, 4 hours 8 minutes before
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Hazardous weather outlook, Aug 2, 4:45 AM CDT, 20 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
445 AM CDT MON AUG 2 2010

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-030945-
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-
445 AM CDT MON AUG 2 2010

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

A COMPLEX OF THUNDERSTORMS OVER WESTERN IOWA THIS MORNING MAY MOVE
EAST TO AFFECT THE IOWA PORTIONS OF THE OUTLOOK AREA LATE THIS
MORNING OR EARLY AFTERNOON. THESE STORMS ARE NOT EXPECTED TO
APPROACH SEVERE LIMITS...BUT MAY BRING A BRIEF HEAVY RAINFALL.
SOME ISOLATED TO SCATTERED STORMS ARE POSSIBLE THIS AFTERNOON AND
EARLY EVENING AS WELL.

IT WILL BE VERY HOT AND HUMID OVER SOUTHEAST IOWA AND NORTHEAST
MISSOURI THIS AFTERNOON AND EARLY EVENING. HEAT INDEX VALUES MAY
HOVER AROUND 100 DEGREES FOR A FEW HOURS.

TONIGHT A NEW ROUND OF THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE
AREA FROM THE WEST BEGINNING IN THE MID TO LATE EVENING HOURS.
SOME OF THESE STORMS MAY BE SEVERE...WITH THE MAIN RISK BEING
DAMAGING WINDS AND LARGE HAIL...ESPECIALLY IN THE MID TO LATE
EVENING HOURS. OVERNIGHT THE THREAT SHIFTS TO VERY HEAVY RAINFALL
AND FLASH FLOODING AS STORMS REPEATEDLY MOVE OVER THE SAME AREAS.
THE GREATEST RISK OF THIS OCCURRING IS ALONG AND NORTH OF THE
INTERSTATE 80 CORRIDOR. LOCAL RAINFALL AMOUNTS MAY EXCEED 3 INCHES.
THIS RAINFALL MAY AGGRAVATE ONGOING RIVER FLOODING OR CAUSE NEW
RISES ON OTHER RIVERS.

AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST
FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SEVERAL ROUNDS OF THUNDERSTORMS ARE EXPECTED TUESDAY THROUGH
WEDNESDAY NIGHT. THE STORM PREDICTION CENTER HAS A SLIGHT RISK OF
SEVERE THUNDERSTORMS ACROSS THE ENTIRE OUTLOOK AREA ON TUESDAY.
WHILE ISOLATED DAMAGING WINDS ARE POSSIBLE THE GREATER CONCERN
WILL BE TORRENTIAL RAINS PRODUCING FLASH FLOODING. SUCCESSIVE
BOUTS OF THUNDERSTORMS MAY ALSO RENEW OR WORSEN RIVER FLOODING.

A DANGEROUSLY HOT DAY IS EXPECTED ON TUESDAY. MAXIMUM TEMPERATURES
IN THE LOWER TO MID 90S...COMBINED WITH OPPRESSIVE DEW POINTS WELL
INTO THE 70S TO AROUND 80...WILL CREATE HEAT INDICIES OF 100 TO 110.
WHILE NOT QUITE AS HOT ON WEDNESDAY...HEAT INDICIES MAY STILL BE
IN THE 100 TO 105 RANGE ESPECIALLY SOUTH OF INTERSTATE 80.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. HOWEVER
REPORTS OF RAINFALL OVER AN INCH OR FLOODING WOULD BE APPRECIATED.

HAASE/LE

In the hours before

Special weather statement, Aug 3, 1:26 AM CDT, 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
126 AM CDT TUE AUG 3 2010

IAZ051>054-063>068-076>078-087>089-098-099-ILZ007-009-015>018-
024>026-030830-
BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-CEDAR-CLINTON-MUSCATINE-
SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-HENRY IA-DES MOINES-
VAN BUREN-LEE-CARROLL-WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-
PUTNAM-MERCER-HENDERSON-WARREN-
INCLUDING THE CITIES OF...VINTON...CEDAR RAPIDS...ANAMOSA...
MAQUOKETA...MARENGO...IOWA CITY...TIPTON...CLINTON...MUSCATINE...
BETTENDORF...DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...
FAIRFIELD...MOUNT PLEASANT...BURLINGTON...KEOSAUQUA....
FORT MADISON...MOUNT CARROLL...STERLING...ROCK FALLS...MOLINE...
ROCK ISLAND...KEWANEE...PRINCETON...HENNEPIN...ALEDO...OQUAWKA...
MONMOUTH
126 AM CDT TUE AUG 3 2010

...NUMEROUS THUNDERSTORMS DEVELOPING...

AT 120 AM DOPPLER RADAR INDICATED NUMEROUS THUNDERSTORMS
DEVELOPING ACROSS EASTERN IOWA BETWEEN HIGHWAY 20 AND HIGHWAY 34.
THESE STORMS WERE PRODUCING TORRENTIAL RAINS OF OVER 2 INCHES PER
HOUR AND FREQUENT TO CONTINUOUS CLOUD TO GROUND LIGHTNING. SOME OF
THE STRONGER STORMS WILL ALSO PRODUCE WIND GUSTS TO 40 TO 50 MPH.

BE ALERT FOR FLASH FLOODING AND MOVE TO HIGHER GROUND IF FLOODING
IS OCCURRING OR A WARNING IS ISSUED.

HAASE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 6:16 AM CDTRiver Flood WarningDVNJefferson, Johnson, Louisa, Washington4 days
Aug 3, 7:22 AM CDTAreal Flood WarningDVNIowa, Johnson, Keokuk, Washington12 hr
Aug 3, 12:17 PM CDTHeat AdvisoryDVNDes Moines, Henry, Jefferson, Lee, Van Buren9 hr
Aug 3, 2:13 PM CDTRiver Flood WarningDVNKeokuk5 days

Nearby

Flash Flood Warnings in Iowa, 2010Every flash flood warning in 2010

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.