Alert archive / Illinois / Flash Flood Watches in 2008

Flash Flood Watch 1, NWS Lincoln, IL

March 31, 200814 counties in Illinois

NWS Lincoln, IL issued this flash flood watch at Mar 31, 2008, 11:59 AM CDT for 14 counties in Illinois. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Mar 31, 2008, 11:59 AM CDT (16:59 UTC)
Expired
Apr 1, 2008, 3:27 AM CDT
In force
15 hr
Issued by
NWS Lincoln, IL
Flood severity
None

Counties Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL

The radar

The Evansville,IN radar (KVWX), 119 km from the middle of the area, began a volume at 17:03 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 12:00Z, 5.0 hours before the alert went out and 105 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 12:00Z on 2008-03-31Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2008-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 197 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
-165 J/kg
Mixed-layer LCL
485 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
197 m²/s²
0-3 km storm-relative helicity
259 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Lincoln, IL wrote its last area forecast discussion before this flash flood watch went out at Mar 31, 10:55 AM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Mar 31, 10:55 AM CDT, 1 hour 4 minutes before
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Hazardous weather outlook, Mar 31, 6:00 AM CDT, 5 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
600 AM CDT MON MAR 31 2008

ILZ027>031-037-038-042>046-048-051>057-061-062-066-067-011100-
CHAMPAIGN-CHRISTIAN-COLES-CUMBERLAND-DE WITT-DOUGLAS-EDGAR-
EFFINGHAM-JASPER-KNOX-LOGAN-MACON-MARSHALL-MCLEAN-MENARD-MOULTRIE-
PEORIA-PIATT-SANGAMON-SHELBY-STARK-TAZEWELL-VERMILION-WOODFORD-
600 AM CDT MON MAR 31 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS...EAST CENTRAL ILLINOIS AND SOUTHEAST ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE FOR SOME SCATTERED THUNDERSTORMS THIS AFTERNOON
ACROSS CENTRAL ILLINOIS. A HIGHER RISK FOR THUNDERSTORMS WILL BE
FROM EARLY THIS EVENING INTO THE NIGHTTIME HOURS WITH A COLD FRONT
THAT WILL BE MOVING THROUGH THE AREA. SQUALL LINE DEVELOPMENT WILL
BE POSSIBLE ALONG THE FRONT...WITH THE STRONGER STORMS CAPABLE OF
PRODUCING DAMAGING WINDS AND LARGE HAIL. THE THREAT FOR SEVERE
WEATHER WILL END AS THE COLD FRONT EXITS ILLINOIS IN THE 11 PM TO 3
AM TIME FRAME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

MORE THUNDERSTORMS WILL BE POSSIBLE FROM LATE WEDNESDAY NIGHT INTO
THURSDAY NIGHT AS ANOTHER WEATHER SYSTEM CROSSES THE MIDWEST. SEVERE
WEATHER WILL BE POSSIBLE WITH THIS SYSTEM TOO...SO KEEP ABREAST OF
LATER FORECASTS AS THE SITUATION BECOMES BETTER DEFINED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY FROM LATE AFTERNOON INTO
TONIGHT.

ILZ036-040-041-047-049-050-011100-
CASS-FULTON-MASON-MORGAN-SCHUYLER-SCOTT-
600 AM CDT MON MAR 31 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE FOR SOME SCATTERED THUNDERSTORMS THIS AFTERNOON
ACROSS CENTRAL ILLINOIS. A HIGHER RISK FOR THUNDERSTORMS WILL BE
FROM EARLY THIS EVENING INTO THE NIGHTTIME HOURS WITH A COLD FRONT
THAT WILL BE MOVING THROUGH THE AREA. SQUALL LINE DEVELOPMENT WILL
BE POSSIBLE ALONG THE FRONT...WITH THE STRONGER STORMS CAPABLE OF
PRODUCING DAMAGING WINDS AND LARGE HAIL. THE THREAT FOR SEVERE
WEATHER WILL END AS THE COLD FRONT EXITS THE ILLINOIS RIVER VALLEY
BEFORE MIDNIGHT.

THE ILLINOIS RIVER WILL REMAIN IN FLOOD AT HAVANA AND POINTS
DOWNSTREAM THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

MORE THUNDERSTORMS WILL BE POSSIBLE FROM LATE WEDNESDAY NIGHT INTO
THURSDAY NIGHT AS ANOTHER WEATHER SYSTEM CROSSES THE MIDWEST. SEVERE
WEATHER WILL BE POSSIBLE WITH THIS SYSTEM TOO...SO KEEP ABREAST OF
LATER FORECASTS AS THE SITUATION BECOMES BETTER DEFINED.

THE ILLINOIS RIVER WILL REMAIN ABOVE FLOOD STAGE FOR THE NEXT
SEVERAL DAYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND THIS
EVENING.

ILZ063-068-071>073-011100-
CLARK-CLAY-CRAWFORD-LAWRENCE-RICHLAND-
600 AM CDT MON MAR 31 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
ILLINOIS AND SOUTHEAST ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE FOR SOME SCATTERED THUNDERSTORMS THIS AFTERNOON
ACROSS SOUTHEAST ILLINOIS. A HIGHER RISK FOR THUNDERSTORMS WILL
BE TONIGHT WITH A COLD FRONT THAT WILL BE MOVING THROUGH THE AREA.
SQUALL LINE DEVELOPMENT WILL BE POSSIBLE ALONG THE FRONT...WITH
THE STRONGER STORMS CAPABLE OF PRODUCING DAMAGING WINDS AND LARGE
HAIL. THE THREAT FOR SEVERE WEATHER WILL END AS THE COLD FRONT
EXITS ILLINOIS IN THE MIDNIGHT TO 3 AM TIME FRAME.

RIVER STAGES ALONG PORTIONS OF THE WABASH...EMBARRAS...AND LITTLE
WABASH RIVERS WILL REMAIN ABOVE FLOOD STAGE THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

MORE THUNDERSTORMS WILL BE POSSIBLE FROM LATE WEDNESDAY NIGHT INTO
THURSDAY NIGHT AS ANOTHER WEATHER SYSTEM CROSSES THE MIDWEST. SEVERE
WEATHER WILL BE POSSIBLE WITH THIS SYSTEM TOO...SO KEEP ABREAST OF
LATER FORECASTS AS THE SITUATION BECOMES BETTER DEFINED.

RIVER STAGES ALONG PORTIONS OF THE WABASH...EMBARRAS...AND LITTLE
WABASH RIVERS WILL REMAIN ABOVE FLOOD STAGE FOR THE NEXT SEVERAL
DAYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY TONIGHT.

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 31, 8:20 AM CDTSevere Thunderstorm WarningILXSchuyler40 min
Mar 31, 8:55 AM CDTSevere Thunderstorm WarningILXCass, Fulton, Mason, Morgan, Schuyler50 min
Mar 31, 5:36 PM CDTHigh Wind WarningILXChampaign, DeWitt, McLean, Piatt, Vermilion89 min

Nearby

Flash Flood Watches in Illinois, 2008Every flash flood watch in 2008

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.