Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 22, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Aug 11, 2016, 11:05 PM CDT for Cedar County, Iowa. It was in force for 6 hr. 3 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
- Aug 11, 2016, 11:05 PM CDT (04:05 UTC)
- Expired
- Aug 12, 2016, 5:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Cedar County, IA
The radar
The Quad Cities radar (KDVN), 47 km from the middle of the area, began a volume at 04:05 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 |
|---|---|---|---|
| Aug 11, 11:12 PM CDT | HEAVY RAIN 2.83 | Lowden, IA | UPDATED RAINFALL AMOUNT SINCE 830 PM. |
| Aug 12, 12:37 AM CDT | HEAVY RAIN 3.53 | Lowden, IA | IN THE LAST 4 HOURS. 4.04 IS THE DAILY TOTAL WHICH INCLUDES RAIN FROM THURSDAY MORNING. |
| Aug 12, 1:30 AM CDT | FLASH FLOOD | Sunbury, IA | CEDAR COUNTY ROAD DEPARTMENT REPORTED THAT A FEW ROADS REMAIN CLOSED FRIDAY LATE MORNING DUE TO WATER OVER THE ROADS. NUMEROUS ROADS WERE COVERED WITH WATER FROM FLASH FLOODING |
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, 4.1 hours before the alert went out and 53 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
- 1433 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1263 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 5.6
The text
As transmitted.
927 WGUS53 KDVN 120405 FFWDVN IAC031-121000- /O.NEW.KDVN.FF.W.0022.160812T0405Z-160812T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA/IL 1105 PM CDT THU AUG 11 2016 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... CEDAR COUNTY IN EAST CENTRAL IOWA... * UNTIL 500 AM CDT * AT 1103 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. 2 TO 3 INCHES OF RAIN HAVE FALLEN SO FAR...AND AN ADDITIONAL 2 TO 3 INCHES IS POSSIBLE THROUGH THE OVERNIGHT HOURS. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... TIPTON...WEST BRANCH...DURANT...MECHANICSVILLE...STANWOOD...LOWDEN... BENNETT...ROCHESTER...BUCHANAN...CLARENCE...CEDAR COUNTY FAIRGROUNDS... BENNETT PARK...TIPTON MATTHEWS AIRPORT...CEDAR VALLEY PARK...HERBERT HOOVER NATIONAL HISTORIC SITE...CEDAR BLUFF...SUNBURY...SPRINGDALE... MASSILLON PARK AND CEDAR VALLEY. FLOODING OF STREETS AND ROADS IN URBAN AREAS IS THE MAIN CONCERN. DO NOT DRIVE THROUGH WATER OF ANY DEPTH. THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 254 AND 278. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 4195 9090 4160 9090 4160 9137 4195 9136 $$ RP KINNEY
3 follow-up statements
346 WGUS73 KDVN 120445 FFSDVN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA/IL 1145 PM CDT THU AUG 11 2016 IAC031-121000- /O.CON.KDVN.FF.W.0022.000000T0000Z-160812T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CEDAR IA- 1145 PM CDT THU AUG 11 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR CEDAR COUNTY... AT 1144 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. 2 TO 4 INCHES OF RAIN HAVE FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... TIPTON...WEST BRANCH...DURANT...MECHANICSVILLE...STANWOOD...LOWDEN... BENNETT...ROCHESTER...BUCHANAN...CLARENCE...CEDAR COUNTY FAIRGROUNDS... BENNETT PARK...TIPTON MATTHEWS AIRPORT...CEDAR VALLEY PARK...HERBERT HOOVER NATIONAL HISTORIC SITE...CEDAR BLUFF...SUNBURY...SPRINGDALE... MASSILLON PARK AND CEDAR VALLEY. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 4195 9090 4160 9090 4160 9137 4195 9136 $$ RP KINNEY
768 WGUS73 KDVN 120654 FFSDVN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA/IL 154 AM CDT FRI AUG 12 2016 IAC031-121000- /O.CON.KDVN.FF.W.0022.000000T0000Z-160812T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CEDAR IA- 154 AM CDT FRI AUG 12 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR CEDAR COUNTY... AT 150 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCED HEAVY RAIN ACROSS THE WARNED AREA WITH AMOUNTS BETWEEN 3 AND 4 INCHES ESTIMATED THUS FAR. RAIN RATES HAVE DIMINISHED THOUGH LIGHT TO MODERATE RAIN WAS STILL OCCURRING. SOME LOCATIONS UNDER THREAT OF FLASH FLOODING INCLUDE... TIPTON...WEST BRANCH...DURANT...MECHANICSVILLE...STANWOOD... LOWDEN... BENNETT...ROCHESTER...BUCHANAN...CLARENCE... CEDAR COUNTY FAIRGROUNDS...BENNETT PARK...TIPTON MATTHEWS AIRPORT... CEDAR VALLEY PARK...HERBERT HOOVER NATIONAL HISTORIC SITE... CEDAR BLUFF...SUNBURY...SPRINGDALE...MASSILLON PARK AND CEDAR VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLASH FLOODING. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING SPOTS. IN HILLY TERRAIN THERE ARE LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED ROADS. FIND AN ALTERNATE ROUTE. && LAT...LON 4195 9090 4160 9090 4160 9137 4195 9136 $$ WOLF
797 WGUS73 KDVN 121007 FFSDVN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA/IL 507 AM CDT FRI AUG 12 2016 IAC031-121016- /O.EXP.KDVN.FF.W.0022.000000T0000Z-160812T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CEDAR IA- 507 AM CDT FRI AUG 12 2016 ...THE FLASH FLOOD WARNING FOR CEDAR COUNTY HAS EXPIRED... THE HEAVY RAIN HAS ENDED ALTHOUGH LIGHT RAIN WILL CONTINUE FOR A FEWHOURS. FLASH FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 4195 9090 4160 9090 4160 9137 4195 9136 $$ WOLF
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:00 PM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Dubuque, Jackson, Jones and 1 more | 60 min |
| Aug 11, 7:48 PM CDT | Flash Flood Warning | DVN | Linn | 3 hr |
| Aug 11, 8:16 PM CDT | Special Weather Statement | DVN | Iowa, Jackson, Jones | 59 min |
| Aug 11, 8:57 PM CDT | Special Weather Statement | DVN | Benton, Cedar, Clinton, Iowa, Jackson, Johnson and 3 more | 93 min |
| Aug 11, 9:15 PM CDT | River Flood Watch | DVN | Clinton, Scott | 4 days |
| Aug 11, 9:31 PM CDT | Flash Flood Warning | DVN | Benton, Iowa, Johnson, Linn | 6 hr |
| Aug 11, 9:53 PM CDT | River Flood Watch | DVN | Iowa, Johnson | 4 days |
| Aug 11, 9:53 PM CDT | River Flood Watch | DVN | Johnson, Washington | 4 days |
| Aug 11, 10:33 PM CDT | Special Weather Statement | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more | 87 min |
| Aug 11, 11:53 PM CDT | Special Weather Statement | DVN | Clinton, Des Moines, Henry, Jefferson, Keokuk, Louisa and 4 more | 67 min |
| Aug 12, 2:29 AM CDT | Special Weather Statement | DVN | Des Moines, Henry, Jefferson, Louisa, Van Buren | 2 hr |
| Aug 12, 7:26 AM CDT | River Flood Warning | DVN | Clinton, Scott | 4 days |
| Aug 12, 8:50 AM CDT | River Flood Warning | DVN | Cedar, Louisa, Muscatine | 4 days |
| Aug 12, 8:50 AM CDT | River Flood Warning | DVN | Iowa | 4 days |
| Aug 12, 8:50 AM CDT | River Flood Warning | DVN | Johnson, Washington | 4 days |
| Aug 12, 10:05 AM CDT | Areal Flood Warning | DVN | Benton, Buchanan, Cedar, Clinton, Iowa, Johnson and 4 more | 9 hr |
| Aug 12, 10:44 AM CDT | River Flood Watch | DVN | Louisa | 6 days |
| Aug 12, 10:44 AM CDT | River Flood Watch | DVN | Louisa | 5 days |
| Aug 12, 10:44 AM CDT | River Flood Watch | DVN | Louisa | 5 days |
Nearby
Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016
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.