Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 45, NWS St. Louis, MO

June 13, 2011Adams County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 13, 2011, 10:31 PM CDT for Adams County, Illinois. It was in force for 8 hr. 1 report 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, 10:31 PM CDT (03:31 UTC)
Expired: Jun 14, 2011, 6:30 AM CDT
In force: 8 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Adams County, IL

The radar

The St Louis radar (KLSX), 153 km from the middle of the area, began a volume at 03:33 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
Jun 14, 2:29 AM CDT	FLASH FLOOD	Quincy, IL	SHERIFF DEPT REPORTS A LOT OF STANDING WATER ON MANY ROADS ACROSS THE COUNTY.

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, 3.5 hours before the alert went out and 194 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1568 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 266 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.

792 
WGUS53 KLSX 140331
FFWLSX
ILC001-141130-
/O.NEW.KLSX.FF.W.0045.110614T0331Z-110614T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1031 PM CDT MON JUN 13 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 630 AM CDT TUESDAY

* AT 1028 PM CDT...RADAR INDICATED THAT VERY HEAVY RAIN FELL 
  DURING THE LATE AFTERNOON ON TUESDAY...PRIMARILY IN THE MC KEE
  CREEK STREAM BASIN.  RADAR IS NOW SHOWING THAT MORE HEAVY
  THUNDERSTORMS ARE MOVING INTO ADAMS COUNTY...AND ADDITIONAL HEAVY
  RAIN IS LIKELY OVER THE NEXT FEW HOURS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...QUINCY...
  BEVERLY...CAMP POINT...CLAYTON...FALL CREEK...GOLDEN...MENDON AND
  PAYSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS IN EXCESS OF 2 INCHES ARE POSSIBLE IN 
THE WARNED AREA.

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.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A
SMALL ONE...ON FOOT OR IN A VEHICLE.

&&

LAT...LON 4019 9092 3976 9092 3976 9136 3980 9137
      3985 9144 3989 9145 3992 9142 3993 9142
      4004 9150 4007 9149 4019 9151 4020 9129

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 11:13 PM CDT	Flash Flood Warning	LSX	Brown, Pike	8 hr
Jun 13, 11:48 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	30 min
Jun 14, 1:50 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	16 min
Jun 14, 4:52 AM CDT	River Flood Warning	LSX	Adams	10 days
Jun 14, 6:30 AM CDT	Flash Flood Warning	LSX	Adams	6 hr
Jun 14, 6:56 AM CDT	Flash Flood Warning	LSX	Brown, Pike	6 hr
Jun 14, 8:51 AM CDT	River Flood Warning	LSX	Brown	10 days
Jun 14, 9:27 AM CDT	Areal Flood Advisory	LSX	Bond, Clinton, Madison, Saint Clair, Washington	3 hr
Jun 14, 10:11 AM CDT	River Flood Warning	LSX	Fayette	11 hr

Nearby

Flash Flood Warnings in Illinois, 2011 Every 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.