Alert archive / Illinois / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 164, NWS Lincoln, IL

August 4, 2010Champaign County, Vermilion County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 4, 2010, 6:22 PM CDT for Champaign County, Vermilion County, Illinois. It was in force for 53 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: Aug 4, 2010, 6:22 PM CDT (23:22 UTC)
Expired: Aug 4, 2010, 7:15 PM CDT
In force: 53 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Champaign County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 117 km from the middle of the area, began a volume at 23:25 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
Aug 4, 3:12 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.4 hours before the alert went out and 54 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: 3057 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1226 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: -33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

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 Aug 4, 6:15 PM CDT, 7 minutes earlier.

Area forecast discussion, Aug 4, 6:15 PM CDT, 7 minutes before

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Hazardous weather outlook, Aug 4, 3:15 PM CDT, 3 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
315 PM CDT WED AUG 4 2010

ILZ027>031-036>038-051100-
FULTON-KNOX-MARSHALL-MCLEAN-PEORIA-STARK-TAZEWELL-WOODFORD-
315 PM CDT WED AUG 4 2010

...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TONIGHT

HOT AND HUMID CONDITIONS WILL CONTINUE INTO THIS EVENING...WITH
HEAT INDICES HOVERING AROUND 100 DEGREES.

SCATTERED THUNDERSTORMS WILL DEVELOP ALONG AN OUTFLOW BOUNDARY
STRETCHING FROM NORTHERN MISSOURI INTO CENTRAL ILLINOIS THIS
EVENING. BASED ON THE LATEST SATELLITE IMAGERY...IT APPEARS THE
BEST CHANCE FOR STORM DEVELOPMENT WILL BE SOUTH OF A CANTON TO
BLOOMINGTON-NORMAL LINE. ANY STORMS THAT FIRE WILL BE CAPABLE OF
FREQUENT LIGHTNING AND TORRENTIAL RAINFALL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

ILZ040>057-061>063-051100-
CASS-CHAMPAIGN-CHRISTIAN-CLARK-COLES-CUMBERLAND-DE WITT-DOUGLAS-
EDGAR-LOGAN-MACON-MASON-MENARD-MORGAN-MOULTRIE-PIATT-SANGAMON-
SCHUYLER-SCOTT-SHELBY-VERMILION-
315 PM CDT WED AUG 4 2010

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

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

.DAY ONE...TONIGHT

DANGEROUS LEVELS OF HEAT WILL CONTINUE INTO THIS EVENING...WITH
HEAT INDICES HOVERING IN THE 105 TO 110 DEGREE RANGE.

SCATTERED THUNDERSTORMS WILL DEVELOP ALONG AN OUTFLOW BOUNDARY
STRETCHING FROM NORTHERN MISSOURI INTO CENTRAL ILLINOIS THIS
EVENING. BASED ON THE LATEST SATELLITE IMAGERY...IT APPEARS THE
BEST CHANCE FOR STORM DEVELOPMENT WILL BE ALONG AND SOUTH OF A
CANTON TO BLOOMINGTON-NORMAL LINE. ANY STORMS THAT FIRE WILL BE
CAPABLE OF FREQUENT LIGHTNING AND TORRENTIAL RAINFALL. SOME OF THE
STRONGEST CELLS COULD POTENTIALLY PRODUCE DAMAGING WIND GUSTS AS
WELL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING THROUGH 10 PM.

ILZ066>068-071>073-051100-
CLAY-CRAWFORD-EFFINGHAM-JASPER-LAWRENCE-RICHLAND-
315 PM CDT WED AUG 4 2010

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
ILLINOIS.

.DAY ONE...TONIGHT

DANGEROUS LEVELS OF HEAT WILL CONTINUE INTO THIS EVENING...WITH HEAT
INDICES EXCEEDING 110 DEGREES.

THERE WILL BE A CHANCE FOR THUNDERSTORMS TONIGHT AS A FRONTAL
BOUNDARY SINKS SLOWLY SOUTHWARD INTO THE REGION. FREQUENT
LIGHTNING AND LOCALLY HEAVY RAINFALL WILL BE LIKELY WITH THE
STORMS. SOME OF THE STRONGEST CELLS COULD POTENTIALLY PRODUCE
DAMAGING WIND GUSTS AS WELL...ESPECIALLY DURING THE EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORM CHANCES WILL LINGER INTO THURSDAY AS THE FRONT REMAINS
IN THE VICINITY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING BETWEEN 6 PM AND MIDNIGHT.

BARNES

In the hours before

Local storm report, Aug 4, 5:28 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
528 PM CDT WED AUG 04 2010

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

0435 PM     TSTM WND DMG     VIRGINIA                39.95N 90.21W
08/04/2010                   CASS               IL   LAW ENFORCEMENT

            METAL CARPORTS BLOWN OVER.

&&

JRP

Local storm report, Aug 4, 5:34 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
534 PM CDT WED AUG 04 2010

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

0518 PM     HAIL             2 W ROSSVILLE           40.38N 87.71W
08/04/2010  M0.75 INCH       VERMILION          IL   EMERGENCY MNGR

&&

JRP

Local storm report, Aug 4, 5:36 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
536 PM CDT WED AUG 04 2010

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

0435 PM     TSTM WND DMG     VIRGINIA                39.95N 90.21W
08/04/2010                   CASS               IL   LAW ENFORCEMENT

            TREES DOWN IN VIRGINA.

0435 PM     TSTM WND DMG     VIRGINIA                39.95N 90.21W
08/04/2010                   CASS               IL   LAW ENFORCEMENT

            METAL CARPORTS BLOWN OVER.

0518 PM     HAIL             2 W ROSSVILLE           40.38N 87.71W
08/04/2010  M0.75 INCH       VERMILION          IL   EMERGENCY MNGR

&&

JRP

Special weather statement, Aug 4, 6:01 PM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
601 PM CDT WED AUG 4 2010

ILZ046-050000-
VERMILION-
601 PM CDT WED AUG 4 2010

...SIGNIFICANT WEATHER ALERT FOR CENTRAL VERMILION COUNTY UNTIL 700
PM CDT...

AT 557 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR DANVILLE...MOVING EAST AT 30 MPH.

PENNY SIZE HAIL...AND WINDS AROUND 55 MPH ARE EXPECTED WITH THIS
STORM. FREQUENT CLOUD TO GROUND LIGHTNING WILL ALSO OCCUR WITH THIS
STORM.

THIS STORM WILL AFFECT MAINLY RURAL AREAS OF CENTRAL VERMILION
COUNTY...INCLUDING THE TOWNS OF TILTON...DANVILLE AND VERMILION
COUNTY AIRPORT.

LAT...LON 4001 8754 4006 8794 4019 8794 4029 8754
TIME...MOT...LOC 2302Z 273DEG 27KT 4015 8765

HUETTL

Special weather statement, Aug 4, 6:13 PM CDT, 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
613 PM CDT WED AUG 4 2010

ILZ045-046-050015-
CHAMPAIGN-VERMILION-
613 PM CDT WED AUG 4 2010

...SIGNIFICANT WEATHER ALERT FOR CENTRAL VERMILION AND EASTERN
CHAMPAIGN COUNTIES UNTIL 715 PM CDT...

AT 611 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM THOMASBORO TO URBANA
TO SIDNEY...MOVING EAST AT 30 MPH.

UP TO PENNY SIZE HAIL...AND WINDS AROUND 55 MPH ARE EXPECTED WITH
THESE STORMS. FREQUENT CLOUD TO GROUND LIGHTNING WILL ALSO OCCUR
WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  THOMASBORO...
  ST. JOSEPH...
  HOMER...
  OGDEN...
  FITHIAN...
  FAIRMOUNT...

OTHER LOCATIONS AFFECTED INCLUDE...FLATVILLE...ROYAL...JAMAICA...
KICKAPOO STATE PARK...ARMSTRONG AND COLLISON.

PEOPLE NEAR THESE LOCATIONS SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS...AND BE PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

LAT...LON 3995 8753 3998 8812 4026 8831 4037 8753
TIME...MOT...LOC 2313Z 266DEG 27KT 4025 8826 4013 8812
          4001 8806

HUETTL

Local storm report, Aug 4, 6:17 PM CDT, 5 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
Aug 3, 7:22 PM CDT	Excessive Heat Warning	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 21 more	24 hr
Aug 4, 3:44 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Mason, Schuyler	61 min
Aug 4, 4:51 PM CDT	Special Weather Statement	ILX	Piatt	39 min
Aug 4, 5:06 PM CDT	Special Weather Statement	ILX	Vermilion	39 min
Aug 4, 6:01 PM CDT	Special Weather Statement	ILX	Vermilion	59 min
Aug 4, 6:13 PM CDT	Special Weather Statement	ILX	Champaign, Vermilion	62 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.