Alert archive / Illinois / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 14, NWS Lincoln, IL

April 7, 2010Effingham County, Jasper County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 7, 2010, 3:03 PM CDT for Effingham County, Jasper County, Illinois. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 7, 2010, 3:03 PM CDT (20:03 UTC)
Expired: Apr 7, 2010, 3:45 PM CDT
In force: 42 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Effingham County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 103 km from the middle of the area, began a volume at 20:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 7, 1:24 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.1 hours before the alert went out and 126 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: 814 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: -155 m²/s²
0-3 km storm-relative helicity: -192 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 severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 7, 3:00 PM CDT, 3 minutes earlier.

Area forecast discussion, Apr 7, 3:00 PM CDT, 3 minutes before

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Hazardous weather outlook, Apr 7, 11:01 AM CDT, 4 hours 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
1101 AM CDT WED APR 7 2010

ILZ027>031-036>038-040>043-047>051-081200-
CASS-DE WITT-FULTON-KNOX-LOGAN-MARSHALL-MASON-MCLEAN-MENARD-
MORGAN-PEORIA-SANGAMON-SCHUYLER-SCOTT-STARK-TAZEWELL-WOODFORD-
1101 AM CDT WED APR 7 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

EXPECT PERIODS OF SHOWERS AND SCATTERED THUNDERSTORMS INTO THE
EARLY EVENING. BRIEF HEAVY RAINFALL AND GUSTY WINDS WILL BE LIKELY
WITH THE STRONGER STORMS. HOWEVER THE BIGGER THREAT FOR SEVERE
STORMS WILL BE EAST OF I-55 WHERE DAMAGING WIND GUSTS WILL BE THE
MAIN SEVERE WEATHER THREAT...WITH LARGE HAIL AND AN ISOLATED
TORNADO ALSO POSSIBLE FROM 2 TO 8 PM ESPECIALLY EAST OF I-57.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED EAST OF I-55 FROM 2 TO 8 PM TODAY.

ILZ044>046-052>057-061>063-066>068-071>073-081200-
CHAMPAIGN-CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DOUGLAS-
EDGAR-EFFINGHAM-JASPER-LAWRENCE-MACON-MOULTRIE-PIATT-RICHLAND-
SHELBY-VERMILION-
1101 AM CDT WED APR 7 2010

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

.DAY ONE...TODAY AND TONIGHT

EXPECT PERIODS OF SHOWERS AND SCATTERED THUNDERSTORMS THROUGH
EARLY EVENING. SOME OF THE STORMS MAY BECOME STRONG TO SEVERE
FROM 2 TO 8 PM. THE PRIMARY SEVERE WEATHER THREAT WILL BE DAMAGING
WINDS...HOWEVER LARGE HAIL MAY ALSO OCCUR WITHIN THE STRONGEST
STORMS ALONG WITH AN ISOLATED TORNADO EAST OF I-55.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FROM 2 TO 8 PM TODAY.

KH

In the hours before

Local storm report, Apr 7, 2:32 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
232 PM CDT WED APR 07 2010

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

0229 PM     HAIL             DECATUR                 39.85N 88.93W
04/07/2010  E0.75 INCH       MACON              IL   STORM CHASER

            REPORTED DOWNTOWN DECATUR

&&

DPK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 1:58 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon	47 min
Apr 7, 2:28 PM CDT	Severe Thunderstorm Warning	ILX	McLean	32 min
Apr 7, 2:42 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Macon, Piatt	27 min
Apr 7, 4:23 PM CDT	Severe Thunderstorm Warning	ILX	Effingham, Jasper	52 min
Apr 7, 4:59 PM CDT	Areal Flood Advisory	ILX	Clay, Cumberland, Effingham, Jasper	6 hr
Apr 7, 5:11 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Jasper	49 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2010 Every severe thunderstorm warning in 2010

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.