Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 24, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Jul 23, 2011, 3:00 AM CDT for Buchanan County, Delaware County, Iowa. It was in force for 6 hr. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 23, 2011, 3:00 AM CDT (08:00 UTC)
- Expired
- Jul 23, 2011, 9:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Buchanan County, IA, Delaware County, IA
The radar
The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 08:00 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 5:54 AM CDT | HEAVY RAIN 4.07 | 4 W Stanley, IA | 4.07 SINCE 11 PM. STILL RAINING. 24 HOUR TOTAL 4.34 |
| Jul 23, 6:15 AM CDT | FLASH FLOOD | Quasqueton, IA | HEAVY RAIN - 2.66 INCHES SINCE 1230 AM. TOTAL OF 4.25 INCHES SINCE 9PM. MULTIPLE THUNDERSTORMS ABOUT ONE PER HOUR SINCE ABOUT 9PM. FRONT PASTURE IS FLOODED. DELAYED REPORT DUE TO LOSS OF POWER. |
| Jul 23, 7:45 AM CDT | HEAVY RAIN 5 | 1 W Delhi, IA | AT LAKE DELHI. RELAYED BY MEDIA. |
| Jul 23, 8:45 AM CDT | HEAVY RAIN 3.4 | 4 Ssw Cutshaw Bridge St, IA | RAINFALL IN THE PAST 12 HOURS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 8.0 hours before the alert went out and 138 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3095 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1066 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
692
WGUS53 KDVN 230800
FFWDVN
IAC019-055-231400-
/O.NEW.KDVN.FF.W.0024.110723T0800Z-110723T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
300 AM CDT SAT JUL 23 2011
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BUCHANAN COUNTY IN NORTHEAST IOWA...
THIS INCLUDES THE CITY OF INDEPENDENCE...
DELAWARE COUNTY IN NORTHEAST IOWA...
THIS INCLUDES THE CITY OF MANCHESTER...
* UNTIL 900 AM CDT
* AT 252 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH HEAVY RAINFALL CONTINUING TO REGENERATE AND
MOVE ACROSS PORTIONS OF EASTERN IOWA. THIS WILL RESULT IN FLASH
FLOODING...ESPECIALLY ALONG AND NORTH OF A LINE FROM JESUP TO
MANCHESTER...WHERE DOPPLER RADAR AND SPOTTER REPORTS INDICATED
HEAVY RAINFALL OVER 3 INCHES HAS OCCURRED OVER THE PAST 6
HOURS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WINTHROP...
STANLEY...LAMONT...JESUP...HAZLETON...FAIRBANK...AURORA...
MASONVILLE...GREELEY...EARLVILLE...DUNDEE...DELAWARE...COLESBURG
AND EDGEWOOD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THUNDERSTORMS WITH HEAVY RAINFALL DEVELOPING JUST WEST OF WATERLOO
WILL LIKELY SPREAD ADDITIONAL RAINFALL OF 1 TO 2 INCHES BEFORE
SUNRISE...WHICH WILL RESULT IN FLASH FLOODING.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING...ESPECIALLY WHILE DRIVING.
FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOW LYING URBAN AND RURAL AREAS IS LIKELY.
&&
LAT...LON 4265 9114 4233 9113 4232 9207 4246 9207
4247 9209 4264 9209
$$
SHEETS3 follow-up statements
527
WGUS73 KDVN 230944
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
444 AM CDT SAT JUL 23 2011
IAC019-055-231400-
/O.CON.KDVN.FF.W.0024.000000T0000Z-110723T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DELAWARE IA-BUCHANAN IA-
444 AM CDT SAT JUL 23 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM CDT FOR
BUCHANAN AND DELAWARE COUNTIES...
AT 440 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA.
THUNDERSTORMS CONTINUED TO DEVELOP AND MOVE REPEATEDLY ALONG THE
HIGHWAY 20 CORRIDOR FROM IOWA FALLS...THROUGH WATERLOO...TO
DYERSVILLE. DOPPLER RADAR ESTIMATES INDICATED RAINFALL AMOUNTS OF 1
TO 2 INCHES OVER AN AXIS FROM JESUP TO DELHI IN THE PAST 3
HOURS...WITH OVERNIGHT TOTALS EXCEEDING 3 INCHES OVER MUCH OF THE
AREA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STANLEY...
LAMONT...HAZLETON...AURORA...GREELEY...DUNDEE...COLESBURG AND
EDGEWOOD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THUNDERSTORMS WITH HEAVY RAINFALL RATES WILL CONTINUE TO MOVE
THROUGH THE AREA THROUGH SUNRISE...WITH ADDITIONAL RAINFALL AMOUNTS
OF 1 TO 2 INCHES POSSIBLE.
FLASH FLOODING MEANS WATER WILL RISE RAPIDLY TO LEVELS CAUSING A
THREAT TO LIFE AND PROPERTY. TAKE IMMEDIATE PRECAUTIONS.
FLOODING OF SMALL STREAMS AND CREEKS...COUNTY ROADS...AND LOW LYING
FARMLAND IS LIKELY.
&&
LAT...LON 4265 9114 4233 9113 4232 9207 4246 9207
4247 9209 4264 9209
$$
SHEETS165
WGUS73 KDVN 231246
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
746 AM CDT SAT JUL 23 2011
IAC019-055-231400-
/O.CON.KDVN.FF.W.0024.000000T0000Z-110723T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DELAWARE IA-BUCHANAN IA-
746 AM CDT SAT JUL 23 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 AM CDT FOR
BUCHANAN AND DELAWARE COUNTIES...
AT 740 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS
WITH HEAVY RAINFALL MOVING EAST ALONG AND NORTH OF THE HIGHWAY 20
CORRIDOR. A TRAINED WEATHER SPOTTER REPORTED OVERNIGHT RAINFALL OVER
4 INCHES WEST OF STANLEY...AND DOPPLER RADAR INDICATED WIDESPREAD 3
TO 4 INCH AMOUNTS HAD FALLEN OVERNIGHT OVER MUCH OF DELAWARE AND
BUCHANAN COUNTIES.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STANLEY...
LAMONT...HAZLETON...AURORA...MASONVILLE...MANCHESTER...GREELEY...
EARLVILLE...DUNDEE...COLESBURG AND EDGEWOOD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL AMOUNTS UP TO A HALF INCH WILL BE POSSIBLE
THROUGH 9 AM AS WEAKENING STORMS CONTINUE TO MOVE THROUGH THE
REGION.
FLOODING OF SMALL STREAMS AND CREEKS...COUNTY ROADS...AND LOW LYING
FARMLAND IS LIKELY.
PLEASE REPORT ANY FLOODING OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT
AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4265 9114 4233 9113 4232 9207 4246 9207
4247 9209 4264 9209
$$
SHEETS572
WGUS73 KDVN 231404
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
904 AM CDT SAT JUL 23 2011
IAC019-055-231411-
/O.EXP.KDVN.FF.W.0024.000000T0000Z-110723T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DELAWARE IA-BUCHANAN IA-
904 AM CDT SAT JUL 23 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR BUCHANAN AND DELAWARE
COUNTIES...
THUNDERSTORMS HAVE WEAKENED AND THE THREAT OF FLASH FLOODING HAS
ENDED FOR NOW. THERE HAVE BEEN REPORTS OF SOME PASTURES AND FIELDS
FLOODED.
LAT...LON 4265 9114 4233 9113 4232 9207 4246 9207
4247 9209 4264 9209
$$
HAASEThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 7:45 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Linn | 60 min |
| Jul 22, 8:59 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Jones, Linn | 61 min |
| Jul 22, 9:43 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Jones, Linn | 62 min |
| Jul 22, 9:53 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson, Jones | 67 min |
| Jul 22, 10:11 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Jones, Scott | 64 min |
| Jul 22, 10:54 PM CDT | Special Weather Statement | DVN | Benton, Cedar, Iowa, Johnson, Jones, Linn | 51 min |
| Jul 23, 1:19 AM CDT | Special Weather Statement | DVN | Buchanan, Delaware, Dubuque | 116 min |
| Jul 23, 3:34 AM CDT | Special Weather Statement | DVN | Clinton, Jackson, Jones, Linn | 86 min |
| Jul 23, 2:32 PM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more | 14 hr |
| Jul 23, 6:10 PM CDT | Special Weather Statement | DVN | Des Moines, Henry, Van Buren | 50 min |
| Jul 23, 6:34 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 45 min |
Nearby
Flash Flood Warnings in Iowa, 2011Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.