Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 47, NWS St. Louis, MO

June 13, 2011Brown County, Pike County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 13, 2011, 11:13 PM CDT for Brown County, Pike County, Illinois. It was in force for 8 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
Jun 13, 2011, 11:13 PM CDT (04:13 UTC)
Expired
Jun 14, 2011, 7:00 AM CDT
In force
8 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Brown County, IL, Pike County, IL

The radar

The St Louis radar (KLSX), 122 km from the middle of the area, began a volume at 04:16 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
Jun 14, 12:10 AM CDTFLASH FLOOD2 Se Mount Sterling, IL6 INCHES OF WATER FLOWING OVER ROAD 750 NORTH APPROX 0.5 MILE EAST OF RTE 99 AT HERSMAN
Jun 14, 6:03 AM CDTHEAVY RAIN 2.6Griggsville, IL24 HOUR TOTAL.
Jun 14, 7:00 AM CDTHEAVY RAIN 2.75Mount Sterling, ILRAINFALL LAST 24 HOURS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.2 hours before the alert went out and 195 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, Lincoln, IL at 00:00Z on 2011-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2011-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1855 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
444 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

510 
WGUS53 KLSX 140413
FFWLSX
ILC009-149-141200-
/O.NEW.KLSX.FF.W.0047.110614T0413Z-110614T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1113 PM CDT MON JUN 13 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BROWN COUNTY IN WEST CENTRAL ILLINOIS...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 700 AM CDT TUESDAY

* AT 1112 PM CDT...VERY HEAVY RAIN FELL DURING THE LATE AFTERNOON ON 
  TUESDAY...AND RADAR IS NOW SHOWING THAT MORE THUNDERSTORMS ARE 
  MOVING INTO BROWN AND PIKE COUNTIES...WITH ADDITIONAL HEAVY RAIN 
  IS LIKELY OVER THE NEXT FEW HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PITTSFIELD...ATLAS...BARRY...BUCKHORN...GRIGGSVILLE...MOUNT
  STERLING...PIKE AND PLEASANT HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.

&&

LAT...LON 4011 9091 3976 9092 3976 9136 3973 9137
      3960 9117 3955 9115 3954 9110 3943 9100
      3940 9094 3940 9061 3954 9057 3972 9064
      3983 9057 3988 9058 3997 9051 3998 9061
      4003 9060 4005 9067 4008 9067 4010 9070

$$

TES

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 10:31 PM CDTFlash Flood WarningLSXAdams8 hr
Jun 13, 11:48 PM CDTSevere Thunderstorm WarningLSXAdams, Pike30 min
Jun 14, 1:50 AM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey16 min
Jun 14, 4:52 AM CDTRiver Flood WarningLSXAdams10 days
Jun 14, 6:30 AM CDTFlash Flood WarningLSXAdams6 hr
Jun 14, 6:56 AM CDTFlash Flood WarningLSXBrown, Pike6 hr
Jun 14, 8:51 AM CDTRiver Flood WarningLSXBrown10 days
Jun 14, 9:27 AM CDTAreal Flood AdvisoryLSXBond, Clinton, Madison, Saint Clair, Washington3 hr
Jun 14, 10:11 AM CDTRiver Flood WarningLSXFayette11 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.