Alert archive / Illinois / Flash Flood Warnings in 2011
Flash Flood Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at May 29, 2011, 10:12 AM CDT for Bureau County, Henry County, Mercer County, Illinois. It was in force for 4 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
- May 29, 2011, 10:12 AM CDT (15:12 UTC)
- Expired
- May 29, 2011, 2:33 PM CDT
- In force
- 4 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bureau County, IL, Henry County, IL, Mercer County, IL
The radar
The Quad Cities radar (KDVN), 55 km from the middle of the area, began a volume at 15:15 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 |
|---|---|---|---|
| May 29, 10:25 AM CDT | HEAVY RAIN 1.25 | 3 Se Annawan, IL | RAINFALL OF 1.25 INCHES IN THE PAST HOUR. |
| May 29, 10:59 AM CDT | HEAVY RAIN 1.9 | 3 Nnw Annawan, IL | RAINFALL IN PAST HOUR |
| May 29, 11:00 AM CDT | FLASH FLOOD | Alpha, IL | WATER FLOWING ACROSS OXFORD ROAD IN ALPHA. |
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 12:00Z, 3.2 hours before the alert went out and 52 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 995 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
812
WGUS53 KDVN 291512
FFWDVN
ILC011-073-131-292115-
/O.NEW.KDVN.FF.W.0007.110529T1512Z-110529T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1012 AM CDT SUN MAY 29 2011
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN BUREAU COUNTY IN NORTH CENTRAL ILLINOIS...
HENRY COUNTY IN NORTHWEST ILLINOIS...
THIS INCLUDES THE CITIES OF...KEWANEE...CAMBRIDGE...
SOUTHEASTERN MERCER COUNTY IN NORTHWEST ILLINOIS...
* UNTIL 415 PM CDT SUNDAY
* AT 1006 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.
MORE INTENSE THUNDERSTORMS WITH HEAVY RAIN CAN BE EXPECTED THROUGH
NOON.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WALNUT...
SHEFFIELD...ATKINSON...ANNAWAN AND ANDOVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ADDITIONAL RAINFALL OF 2 TO 4 INCHES IS EXPECTED.
&&
LAT...LON 4119 8993 4114 9013 4115 9043 4107 9043
4106 9046 4106 9051 4110 9058 4140 9016
4159 8974 4159 8936
$$
ERVIN2 follow-up statements
145
WGUS73 KDVN 291711
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1211 PM CDT SUN MAY 29 2011
ILC011-073-131-292115-
/O.CON.KDVN.FF.W.0007.000000T0000Z-110529T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENRY IL-MERCER IL-BUREAU IL-
1211 PM CDT SUN MAY 29 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR
NORTHWESTERN BUREAU...SOUTHEASTERN MERCER AND HENRY COUNTIES...
AT 1205 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A THUNDERSTORM
PRODUCING FLASH FLOODING OVER THE WARNED AREA. FLASH FLOODING WAS
REPORTED OVER ROADS NEAR ALPHA IN SOUTHWEST HENRY COUNTY.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WALNUT...
SHEFFIELD...KEWANEE...CAMBRIDGE...ATKINSON...ANNAWAN AND ANDOVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOW LYING URBAN AND RURAL AREAS IS LIKELY.
PLEASE REPORT ANY FLOODING OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT
AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY
AFTERNOON FOR SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND
NORTHEAST MISSOURI.
&&
LAT...LON 4119 8993 4114 9013 4115 9043 4107 9043
4106 9046 4106 9051 4110 9058 4140 9016
4159 8974 4159 8936
$$
ERVIN039
WGUS73 KDVN 291933
FFSDVN
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
233 PM CDT SUN MAY 29 2011
ILC011-073-131-291941-
/O.CAN.KDVN.FF.W.0007.000000T0000Z-110529T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENRY IL-MERCER IL-BUREAU IL-
233 PM CDT SUN MAY 29 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN
BUREAU...SOUTHEASTERN MERCER AND HENRY COUNTIES...
NO FURTHER REPORTS OF FLASH FLOODING HAVE BEEN RECEIVED...AND
THUNDERSTORMS HAVE LONG SINCE ENDED OVER THE WARNED AREA. IT IS
LIKELY THAT STREAM RUN OFF IS NOW MOVING TOWARDS AREA
RIVERS...CAUSING SIGNIFICANT RISES...AND POSSIBLY FLOODING NEAR
RIVERS. PLEASE SEE THE LATEST RIVER FLOOD STATEMENT FOR UPDATED
RIVER INFORMATION.
LAT...LON 4119 8993 4114 9013 4115 9043 4107 9043
4106 9046 4106 9051 4110 9058 4140 9016
4159 8974 4159 8936
$$
ERVINThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 5:05 AM CDT | Dense Fog Advisory | DVN | Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more | 4 hr |
| May 29, 9:55 AM CDT | Severe Thunderstorm Warning | DVN | Hancock | 65 min |
| May 29, 9:58 AM CDT | Severe Thunderstorm Warning | DVN | Henderson, Mercer, Rock Island, Warren | 62 min |
| May 29, 10:15 AM CDT | Severe Thunderstorm Warning | DVN | Henderson, Warren | 60 min |
| May 29, 10:33 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Mercer, Rock Island, Whiteside | 57 min |
| May 29, 10:54 AM CDT | Severe Thunderstorm Warning | DVN | Carroll, Rock Island, Whiteside | 66 min |
| May 29, 11:03 AM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough, Warren | 34 min |
| May 29, 11:17 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 43 min |
| May 29, 2:38 PM CDT | River Flood Warning | DVN | Henry, Rock Island | 4 days |
| May 29, 2:38 PM CDT | River Flood Warning | DVN | Henry, Rock Island | 51 hr |
Nearby
Flash Flood Warnings in Illinois, 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.