Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 5, NWS Quad Cities, IA

May 25, 2011Bureau County, Henry County, Putnam County, Illinois

NWS Quad Cities, IA issued this flash flood warning at May 25, 2011, 7:11 PM CDT for Bureau County, Henry County, Putnam 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 25, 2011, 7:11 PM CDT (00:11 UTC)
Expired
May 25, 2011, 10:53 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, Putnam County, IL

The radar

The Quad Cities radar (KDVN), 95 km from the middle of the area, began a volume at 00:14 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

TimeReportWhereRemark
May 25, 8:18 PM CDTHEAVY RAIN 1.8Cambridge, ILSTORM TOTAL.
May 25, 8:30 PM CDTHEAVY RAIN 2.75Princeton, ILRAINFALL TOTAL SINCE 6 PM
May 25, 9:08 PM CDTHEAVY RAIN 1.753 Se Annawan, ILRAINFALL TOTAL SINCE 630 PM...1.5 INCHES FELL BETWEEN 630 AND 730 PM

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, 0.2 hours before the alert went out and 89 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.

Skew-T log-pSkew-T log-p diagram, Davenport, at 00:00Z on 2011-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2011-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
6 J/kg
Mixed-layer CIN
-246 J/kg
Mixed-layer LCL
587 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

621 
WGUS53 KDVN 260011
FFWDVN
ILC011-073-155-260615-
/O.NEW.KDVN.FF.W.0005.110526T0011Z-110526T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
711 PM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN BUREAU COUNTY IN NORTH CENTRAL ILLINOIS...
  THIS INCLUDES THE CITY OF PRINCETON...
  PUTNAM COUNTY IN NORTH CENTRAL ILLINOIS...
  THIS INCLUDES THE CITY OF HENNEPIN...
  SOUTHERN HENRY COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITIES OF...KEWANEE...CAMBRIDGE...

* UNTIL 115 AM CDT THURSDAY

* AT 705 PM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN 
AND AROUND THE GALVA AND BISHOP HILL AREA FROM A LINE OF 
THUNDERSTORMS MOVING OVER HENRY...BUREAU AND PUTNAM COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GRANVILLE...WYANET...TISKILWA...SPRING VALLEY...SHEFFIELD...LADD...
  DEPUE...DALZELL...BUDA...WARNER...ORION...LYNN CENTER...ATKINSON...
  ANNAWAN AND ANDOVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL 
STREAMS AND CREEKS...HIGHWAYS AND STREETS...AND LOW LYING URBAN AND 
RURAL AREAS.

AVOID OR MOVE IMMEDIATELY FROM THESE AREAS TO HIGHER GROUND.

&&

LAT...LON 4110 8916 4110 8935 4111 8936 4112 8934
      4114 8934 4115 8963 4123 8964 4123 8986
      4116 8988 4116 9042 4142 9043 4143 8917

$$

WOLF
2 follow-up statements
791 
WGUS73 KDVN 260050
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
750 PM CDT WED MAY 25 2011

ILC011-073-155-260615-
/O.CON.KDVN.FF.W.0005.000000T0000Z-110526T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENRY IL-PUTNAM IL-BUREAU IL-
750 PM CDT WED MAY 25 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
SOUTHERN BUREAU...PUTNAM AND SOUTHERN HENRY COUNTIES...

AT 747 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE HEAVIEST RAIN HAS MOVED NORTH OF THE AREA.  HOWEVER...LIGHT 
TO MODERATE RAIN WILL PERSIST THROUGH 9 OR 10 PM...SO THE FLASH 
FLOOD WARNING WILL REMAIN IN EFFECT.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WYANET...
TISKILWA...SPRING VALLEY...SHEFFIELD...PRINCETON...LADD...DEPUE...
DALZELL...BUDA...WARNER...ORION...LYNN CENTER...KEWANEE...
CAMBRIDGE...ATKINSON...ANNAWAN...ANDOVER...HENNEPIN AND GRANVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES
SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT.

&&

LAT...LON 4110 8916 4110 8935 4111 8936 4112 8934
      4114 8934 4115 8963 4123 8964 4123 8986
      4116 8988 4116 9042 4142 9043 4143 8917

$$

WOLF
070 
WGUS73 KDVN 260353
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1053 PM CDT WED MAY 25 2011

ILC011-073-155-260402-
/O.CAN.KDVN.FF.W.0005.000000T0000Z-110526T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENRY IL-PUTNAM IL-BUREAU IL-
1053 PM CDT WED MAY 25 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN BUREAU...
PUTNAM AND SOUTHERN HENRY COUNTIES...

WATER HAS RECEDED FROM ROADS ACROSS THE AREA AND NO SIGNIFICANT 
ADDITIONAL RAINFALL IS EXPECTED...THUS THE FLASH FLOOD WARNING HAS 
BEEN CANCELLED.

LAT...LON 4110 8916 4110 8935 4111 8936 4112 8934
      4114 8934 4115 8963 4123 8964 4123 8986
      4116 8988 4116 9042 4142 9043 4143 8917

$$

NICHOLS

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 7:36 PM CDTFlash Flood WarningDVNBureau3 hr
May 26, 7:31 AM CDTRiver Flood WarningDVNHenry, Rock Island22 hr
May 26, 10:52 AM CDTRiver Flood WarningDVNHancock24 hr
May 26, 10:52 AM CDTRiver Flood WarningDVNHenry, Rock Island48 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.