Alert archive / Illinois / Flash Flood Warnings in 2009

Flash Flood Warning 62, NWS Paducah, KY

September 20, 2009Edwards County, Wabash County, Illinois

NWS Paducah, KY issued this flash flood warning at Sep 20, 2009, 10:02 PM CDT for Edwards County, Wabash County, Illinois. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 20, 2009, 10:02 PM CDT (03:02 UTC)
Expired
Sep 21, 2009, 2:00 AM CDT
In force
4 hr
Issued by
NWS Paducah, KY
Area
Storm-based polygon
Flood severity
None

Counties Edwards County, IL, Wabash County, IL

The radar

The Evansville,IN radar (KVWX), 27 km from the middle of the area, began a volume at 03:01 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.0 hours before the alert went out and 199 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 2009-09-21Temperature 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 2009-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.193958Sfc1 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
488 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Paducah, KY wrote its last area forecast discussion before this flash flood warning went out at Sep 20, 2:31 PM CDT, 7 hours 31 minutes earlier.

Area forecast discussion, Sep 20, 2:31 PM CDT, 7 hours 31 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PADUCAH KY
231 PM CDT SUN SEP 20 2009

.DISCUSSION...
NICE FETCH OF TROPICAL MOISTURE AMPLY TAPPED AS SEEN ON
88D/MOSAIC...HIGHEST POPS/BEST COVERAGE EAST OF MS RIVER. BNA 12Z
SOUNDING SHOWS PWS NEAR 2 INCHES. NAM MODELS ONGOING CONVECTION
WELL...AND KEEPS ERN 1/3 FA WET THIS EVENING...BEFORE TAPERING OFF
POPS WEST TO EAST OVERNIGHT. COINCIDING W/THIS TAPERING OFF WILL
BE FORMATION OF AREAS OF FOG FROM WEST TO EAST...SO HAVE INCLUDED
THIS TRENDING AS WELL. GIVEN DEPTH OF MOISTURE WILL HIT HWO AND
SHORT FUSE PRODUCTS HARD ON HEAVY RAIN/POTENTIAL WATER ISSUES BUT
GIVEN TIME SPREAD OF WHAT WILL BECOME GENERALLY LIGHT-MODERATE RAIN
DO NOT ANTICIPATE WATCH NEEDED ATTM...NOT TO SAY MINOR FLOODING
WONT OCCUR.

RELATIVE LULL LATE TONIGHT-EARLY MONDAY LOOKS TO PULSE AGAIN MON
NIGHT-TUESDAY AS SURFACE LOW EJECTS ACROSS AR/MO WITHIN DEEP/WET
SSWLYS. THIS PULSEY TREND MORE OR LESS CONTINUES THRU MID WEEK
WITH ON/OFF AGAIN POPS KEEPING A WET FORECAST...BUT NOT
NECESSARILY A CONTINUALLY WET PERIOD.

THE BIGGEST FORECAST CHALLENGE IS MID WEEK ON...WHERE THE GFS/DGEX
SUGGEST A BUILDING SERN U.S. RIDGE WILL SHUNT THE UPPER LOW WELL
TO THE WEST AND EFFECTIVELY END OUR POPS. MEANWHILE THE HPC AND
COLLABORATIVELY PREFERRED GEFS/ECMWF SLOWLY TRANSLATE THE
LOW/UPPER TROF AND EVENTUALLY AN ATTENDANT COLD FRONT ACROSS THE
AREA BY NEXT WEEKEND...FINALLY ENDING POPS BY DAY 7-8. HOWEVER IT
TOO BUILDS AN UPPER RIDGE INTO/ACROSS THE AREA...ONLY IT POWER
DRIVES THE LOW ACROSS IT DURING THE WEEK. AT THIS POINT IN THE
GAME WILL HAVE TO STICK W/CONSENSUS AND FORECAST
CONTINUITY...MAINTAINING A POP MENTION BUT MUTING IT FROM ECMWF
BULLSEYE POPS.

NEW MOS IS CLOSE TO GOING TEMPS/FORECAST TEMPS AND SO ONLY MINOR
TWEEKS NEEDED THIS PACKAGE.

.AVIATION...
AS A SFC AREA OF LOW PRESSURE MOVES NWD THROUGH THE REGION...SHWRS
AND TSTMS AND MVFR CIGS WILL REMAIN MOST LIKELY EAST OF THE MS RIVER
INTO THE EARLY EVE. AFTER THAT...PCPN COVERAGE SHOULD DECREASE.
OVNGT...WITH PLENTY OF LOW LEVEL MOISTURE IN PLACE...VSBYS ARE
EXPECTED TO DECREASE TO IFR IN SPOTS. IN ADDITION...IFR CIGS ARE
MOST LIKELY IN THE EAST OVNGT. CONDITIONS SHOULD IMPROVE TEMPORARILY
BY MIDDAY MON.

&&

.PAH WATCHES/WARNINGS/ADVISORIES...
KY...NONE.
MO...NONE.
IL...NONE.
IN...NONE.
&&
Hazardous weather outlook, Sep 20, 5:19 AM CDT, 16 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PADUCAH KY
519 AM CDT SUN SEP 20 2009

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-
100-107>112-114-211030-
JEFFERSON-WAYNE IL-EDWARDS-WABASH-PERRY IL-FRANKLIN-HAMILTON-
WHITE-JACKSON-WILLIAMSON-SALINE-GALLATIN-UNION IL-JOHNSON-POPE-
HARDIN-ALEXANDER-PULASKI-MASSAC-GIBSON-PIKE-POSEY-VANDERBURGH-
WARRICK-SPENCER-FULTON-HICKMAN-CARLISLE-BALLARD-MCCRACKEN-GRAVES-
LIVINGSTON-MARSHALL-CALLOWAY-CRITTENDEN-LYON-TRIGG-CALDWELL-
UNION KY-WEBSTER-HOPKINS-CHRISTIAN-HENDERSON-DAVIESS-MCLEAN-
MUHLENBERG-TODD-PERRY MO-BOLLINGER-CAPE GIRARDEAU-WAYNE MO-CARTER-
RIPLEY-BUTLER-STODDARD-SCOTT-MISSISSIPPI-NEW MADRID-
519 AM CDT SUN SEP 20 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN
ILLINOIS...SOUTHWEST INDIANA...WESTERN KENTUCKY AND SOUTHEAST
MISSOURI.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS CROSS THE REGION TODAY AND TONIGHT AS LOW
PRESSURE MOVES UP THE MISSISSIPPI RIVER VALLEY. LOCALLY HEAVY
RAINFALL WILL BE POSSIBLE WITH SOME OF THESE STORMS. IN
ADDITION...A FEW STORMS MAY APPROACH SEVERE LEVELS AS A WARM
FRONT LIFTS NORTH ACROSS THE REGION. AN ISOLATED TORNADO CANNOT
BE RULED OUT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A RISK OF THUNDERSTORMS WILL ALSO CARRY INTO NEXT WEEK. AT THIS
TIME...SEVERE STORMS ARE NOT ANTICIPATED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED...THOUGH SPOTTERS SHOULD
RELAY ANY HEAVY RAINFALL OR FLOODING REPORTS TO THE NATIONAL
WEATHER SERVICE.

In the hours before

Local storm report, Sep 20, 4:56 PM CDT, 5 hours 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
456 PM CDT SUN SEP 20 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     FLASH FLOOD      SANTA CLAUS             38.12N 86.93W
09/20/2009                   SPENCER            IN   LAW ENFORCEMENT

            STATE ROAD 245 WAS UNDER WATER AND CLOSED.

&&

KELLYH
Local storm report, Sep 20, 5:01 PM CDT, 5 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
501 PM CDT SUN SEP 20 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     FLASH FLOOD      ROCKPORT                37.88N 87.05W
09/20/2009                   SPENCER            IN   PUBLIC

            3.8 INCES OF RAIN FALL. RAIN STILL IN PROGRESS

&&

KELLYH
Local storm report, Sep 20, 5:03 PM CDT, 4 hours 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
503 PM CDT SUN SEP 20 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     FLASH FLOOD      CHRISNEY                38.01N 87.03W
09/20/2009                   SPENCER            IN   LAW ENFORCEMENT

            STATE ROAD 231 HAD ONE LANE FLOODED.

&&

KELLYH
Local storm report, Sep 20, 6:11 PM CDT, 3 hours 51 minutes before
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Nearby

Flash Flood Warnings in Illinois, 2009Every flash flood warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.