Alert archive / Illinois / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 126, NWS Lincoln, IL

June 27, 20095 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jun 27, 2009, 8:57 PM CDT for 5 counties in Illinois. It was in force for 48 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: Jun 27, 2009, 8:57 PM CDT (01:57 UTC)
Expired: Jun 27, 2009, 9:45 PM CDT
In force: 48 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon

Counties DeWitt County, IL, Logan County, IL, Macon County, IL, Menard County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 18 km from the middle of the area, began a volume at 02:01 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 27, 2:41 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.0 hours before the alert went out and 65 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: 673 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1854 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 Jun 27, 8:53 PM CDT, 4 minutes earlier.

Area forecast discussion, Jun 27, 8:53 PM CDT, 4 minutes before

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Hazardous weather outlook, Jun 27, 3:09 PM CDT, 5 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
309 PM CDT SAT JUN 27 2009

ILZ040-047-049-050-281100-
CASS-MORGAN-SCHUYLER-SCOTT-
309 PM CDT SAT JUN 27 2009

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

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TONIGHT

MUGGY CONDITIONS THIS AFTERNOON WILL COMBINE WITH TEMPERATURES IN
THE LOWER TO MIDDLE 90S TO PRODUCE HEAT INDEX VALUES NEAR 100
DEGREES. THESE HOT AND HUMID CONDITIONS SHOULD PERSIST INTO EARLY
EVENING. A COLD FRONT WILL APPROACH THE AREA THIS EVENING
BRINGING A CHANCE FOR THUNDERSTORMS AND POSSIBLY LARGE HAIL AND
DAMAGING WINDS. THE BEST CHANCES FOR SEVERE WEATHER WILL BE
BETWEEN 7 PM AND 11 PM.

THE ILLINOIS RIVER WILL REMAIN IN FLOOD THROUGH AT LEAST NEXT
WEEK.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING.

ILZ041>043-048-051>053-281100-
CHRISTIAN-DE WITT-LOGAN-MACON-MASON-MENARD-SANGAMON-
309 PM CDT SAT JUN 27 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TONIGHT

A COLD FRONT WILL APPROACH THE AREA THIS EVENING BRINGING A
CHANCE FOR THUNDERSTORMS AND POSSIBLY LARGE HAIL AND DAMAGING
WINDS. THE BEST CHANCES FOR SEVERE WEATHER WILL BE BETWEEN 8 PM
AND MIDNIGHT.

THE ILLINOIS RIVER FROM HAVANA DOWNSTREAM WILL REMAIN ABOVE FLOOD
STAGE THROUGH AT LEAST NEXT WEEK.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER 700 PM TONIGHT.

ILZ044>046-054>057-061>063-066>068-071>073-281100-
CHAMPAIGN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DOUGLAS-EDGAR-
EFFINGHAM-JASPER-LAWRENCE-MOULTRIE-PIATT-RICHLAND-SHELBY-
VERMILION-
309 PM CDT SAT JUN 27 2009

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

.DAY ONE...TONIGHT

THERE WILL BE SCATTERED THUNDERSTORMS TONIGHT ALONG A COLD FRONT
THAT WILL BE MOVING THROUGH ILLINOIS. MOST OF THE ACTIVITY SHOULD
BE LATE THIS EVENING INTO THE OVERNIGHT HOURS. NO WIDESPREAD
SEVERE STORMS ARE EXPECTED...HOWEVER SOME OF THE STRONGER STORMS
WILL PRODUCE GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

ILZ027>031-036>038-281100-
FULTON-KNOX-MARSHALL-MCLEAN-PEORIA-STARK-TAZEWELL-WOODFORD-
309 PM CDT SAT JUN 27 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS.

.DAY ONE...TONIGHT

A COLD FRONT WILL APPROACH THE AREA THIS EVENING BRINGING A
CHANCE FOR THUNDERSTORMS AND POSSIBLY LARGE HAIL AND DAMAGING
WINDS. THE BEST CHANCES FOR SEVERE WEATHER WILL BE BETWEEN 7 PM
AND MIDNIGHT.

THE ILLINOIS RIVER FROM HAVANA DOWNSTREAM WILL REMAIN ABOVE FLOOD
STAGE THROUGH AT LEAST NEXT WEEK.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER 600 PM TONIGHT.

BARKER

In the hours before

Local storm report, Jun 27, 8:11 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
811 PM CDT SAT JUN 27 2009

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

0807 PM     TSTM WND DMG     2 NE CUBA               40.51N 90.17W
06/27/2009                   FULTON             IL   EMERGENCY MNGR

            POWER LINES DOWN BETWEEN CUBA AND CANTON. ESTIMATED 60
            MPH WINDS.

&&

25

Local storm report, Jun 27, 8:23 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
823 PM CDT SAT JUN 27 2009

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

0821 PM     TSTM WND DMG     HAVANA                  40.30N 90.06W
06/27/2009                   MASON              IL   LAW ENFORCEMENT

            TREES UPROOTED IN HAVANA CITY

&&

25

Local storm report, Jun 27, 8:26 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
826 PM CDT SAT JUN 27 2009

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

0810 PM     TSTM WND DMG     LEWISTOWN               40.40N 90.16W
06/27/2009                   FULTON             IL   EMERGENCY MNGR

            ESTIMATED 60 MPH WIND GUST. 14 INCH DIAMETER TREE DOWN ON
            POWER LINES AND A PARKED VEHICLE.

&&

25

Local storm report, Jun 27, 8:48 PM CDT, 9 minutes before

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Local storm report, Jun 27, 8:55 PM CDT, 2 minutes before

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Local storm report, Jun 27, 8:56 PM CDT, 1 minute 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
Jun 27, 7:02 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Marshall, Peoria, Woodford	58 min
Jun 27, 7:30 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, McLean, Marshall, Mason, Peoria, Tazewell and 1 more	60 min
Jun 27, 7:51 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Mason, Menard, Schuyler	54 min
Jun 27, 8:23 PM CDT	Areal Flood Advisory	ILX	Fulton, Knox, Marshall, Peoria, Stark	3 hr
Jun 27, 8:29 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Logan, Mason, Menard, Schuyler, Tazewell	46 min
Jun 27, 8:52 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan	38 min
Jun 27, 9:19 PM CDT	Areal Flood Advisory	ILX	Cass, Logan, Mason, Menard, Schuyler	3 hr
Jun 27, 9:42 PM CDT	Special Weather Statement	ILX	Morgan, Sangamon	63 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2009 Every severe thunderstorm 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.