Alert archive / Illinois / Flash Flood Watches in 2008

Flash Flood Watch 12, NWS Lincoln, IL

December 27, 2008Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood watch at Dec 27, 2008, 11:44 PM CST for Sangamon County, Illinois. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Dec 27, 2008, 11:44 PM CST (05:44 UTC)
Expired: Dec 28, 2008, 3:43 AM CST
In force: 4 hr
Issued by: NWS Lincoln, IL
Flood severity: None

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 52 km from the middle of the area, began a volume at 05:49 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, 5.7 hours before the alert went out and 100 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: 501 m above ground
0-6 km bulk shear: 87 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -448 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 Dec 27, 11:38 PM CST, 6 minutes earlier.

Area forecast discussion, Dec 27, 11:38 PM CST, 6 minutes before

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Hazardous weather outlook, Dec 27, 3:45 PM CST, 7 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
345 PM CST SAT DEC 27 2008

ILZ027>031-036>038-040>055-061-281200-
CASS-CHAMPAIGN-CHRISTIAN-DE WITT-DOUGLAS-FULTON-KNOX-LOGAN-MACON-
MARSHALL-MASON-MCLEAN-MENARD-MORGAN-MOULTRIE-PEORIA-PIATT-
SANGAMON-SCHUYLER-SCOTT-SHELBY-STARK-TAZEWELL-VERMILION-WOODFORD-
345 PM CST SAT DEC 27 2008

...FLASH FLOOD WATCH IN EFFECT UNTIL 6 PM CST THIS AFTERNOON...

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

.DAY ONE...TONIGHT

SHOWERS AND THUNDERSTORMS WILL GRADUALLY TAPER OFF THIS EVENING.
HOWEVER...DUE TO THE RAINS THAT FELL EARLIER TODAY...SNOW
MELT...AND FROZEN GROUND...SOME FLOODING OR FLASH FLOODING REMAINS
POSSIBLE.

IN ADDITION...COLDER TEMPERATURES ARE EXPECTED TO RETURN
TONIGHT...AND ANY WET SURFACES MAY RE-FREEZE AND PRODUCE SLIPPERY
TRAVEL CONDITIONS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT.

ILZ056-057-062-063-066>068-071>073-281200-
CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-EDGAR-EFFINGHAM-JASPER-
LAWRENCE-RICHLAND-
345 PM CST SAT DEC 27 2008

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

.DAY ONE...TONIGHT

STRONG TO SEVERE THUNDERSTORMS REMAIN POSSIBLE THROUGH ABOUT 7 PM
THIS EVENING. DAMAGING WIND GUSTS ARE THE PRIMARY SEVERE WEATHER
THREAT.

IN ADDITION...COLDER TEMPERATURES ARE EXPECTED TO RETURN
TONIGHT...AND ANY WET SURFACES MAY RE-FREEZE AND PRODUCE SLIPPERY
TRAVEL CONDITIONS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT.

BAK

In the hours before

Local storm report, Dec 27, 6:29 PM CST, 5 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
629 PM CST SAT DEC 27 2008

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

0625 PM     TSTM WND GST     4 S FLORA               38.61N 88.48W
12/27/2008  E60 MPH          CLAY               IL   EMERGENCY MNGR

            ESTIMATED WIND GUSTS OF 60 TO 65 MPH

&&

DPK

Local storm report, Dec 27, 10:21 PM CST, 1 hour 23 minutes before

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Local storm report, Dec 27, 10:47 PM CST, 57 minutes before

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Local storm report, Dec 27, 10:48 PM CST, 56 minutes before

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Local storm report, Dec 27, 11:00 PM CST, 44 minutes before

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Special weather statement, Dec 27, 11:00 PM CST, 44 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 27, 6:00 PM CST	Severe Thunderstorm Warning	ILX	Jasper, Richland	45 min
Dec 27, 6:08 PM CST	Areal Flood Warning	ILX	Schuyler	10 hr
Dec 27, 6:31 PM CST	Severe Thunderstorm Warning	ILX	Clay, Lawrence, Richland	59 min
Dec 27, 6:46 PM CST	Severe Thunderstorm Warning	ILX	Crawford	45 min
Dec 27, 9:11 PM CST	River Flood Warning	ILX	Marshall, Putnam	8 days
Dec 27, 9:11 PM CST	River Flood Warning	ILX	Peoria, Tazewell, Woodford	8 days
Dec 27, 9:11 PM CST	River Flood Warning	ILX	Fulton, Mason	31 hr
Dec 27, 9:11 PM CST	River Flood Warning	ILX	Brown, Cass, Morgan, Schuyler	34 hr
Dec 27, 10:12 PM CST	Winter Weather Advisory	ILX	Cass, DeWitt, Fulton, Knox, Logan, McLean and 8 more	4 hr
Dec 27, 10:41 PM CST	Areal Flood Warning	ILX	Logan	17 hr
Dec 27, 10:43 PM CST	Areal Flood Warning	ILX	Stark	6 hr
Dec 28, 11:59 AM CST	River Flood Warning	ILX	Cass, Mason	7 days

Nearby

Flash Flood Watches in Illinois, 2008 Every 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.