Alert archive / Illinois / Special Weather Statements in 2011

Special Weather Statement, NWS Lincoln, IL

April 3, 2011Marshall County, Illinois

NWS Lincoln, IL issued this special weather statement at Apr 3, 2011, 11:20 PM CDT for Marshall County, Illinois. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 3, 2011, 11:20 PM CDT (04:20 UTC)
Expired
Apr 3, 2011, 11:45 PM CDT
In force
25 min
Issued by
NWS Lincoln, IL

County Marshall County, IL

The radar

The Lincoln radar (KILX), 105 km from the middle of the area, began a volume at 04:23 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

Davenport, (KDVN), launched 00:00Z, 4.3 hours before the alert went out and 110 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, Davenport, at 00:00Z on 2011-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1790 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, Davenport, at 00:00Z on 2011-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.1939587897Sfc1 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
1790 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
1684 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
0.3
Supercell composite
5.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 3, 9:18 PM CDT, 2 hours 2 minutes earlier.

Area forecast discussion, Apr 3, 9:18 PM CDT, 2 hours 2 minutes before
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Hazardous weather outlook, Apr 3, 3:10 PM CDT, 8 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
310 PM CDT SUN APR 3 2011

ILZ027>031-036-037-040-041-047-049-050-041100-
CASS-FULTON-KNOX-MARSHALL-MASON-MORGAN-PEORIA-SCHUYLER-SCOTT-
STARK-TAZEWELL-WOODFORD-
310 PM CDT SUN APR 3 2011

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

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS...MAINLY ALONG AND WEST OF THE ILLINOIS RIVER.

.DAY ONE...TONIGHT

STRONG SOUTHERLY WINDS WILL GUST UP TO 40 MPH AT TIMES INTO EARLY
EVENING...BEFORE DIMINISHING.

SEVERE STORMS ARE POSSIBLE TONIGHT AS A STRONG COLD FRONT PUSHES
THROUGH THE AREA. DAMAGING WINDS AND ISOLATED TORNADOES WILL BE
THE PRIMARY SEVERE WEATHER THREATS. LARGE HAIL ALSO POSSIBLE...
ESPECIALLY WEST OF THE ILLINOIS RIVER.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NORTHWEST WINDS BEHIND THE FRONT WILL GUST FROM 30 TO 35 MPH ON
MONDAY.

PERIODIC THUNDERSTORM CHANCES WILL OCCUR TOWARD THE END OF THE
WEEK...FROM THURSDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT...WITH THE MOST LIKELY
TIME FRAME BETWEEN 6 PM AND MIDNIGHT.

ILZ038-042-043-048-051>053-041100-
CHRISTIAN-DE WITT-LOGAN-MACON-MCLEAN-MENARD-SANGAMON-
310 PM CDT SUN APR 3 2011

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

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
ILLINOIS...MAINLY BETWEEN I-55 AND THE ILLINOIS RIVER.

.DAY ONE...TONIGHT

STRONG SOUTHERLY WINDS WILL GUST IN EXCESS OF 40 MPH AT TIMES INTO
EARLY EVENING...THEN SLOWLY DIMINISH.

SEVERE STORMS ARE POSSIBLE TONIGHT AS A STRONG COLD FRONT PUSHES
THROUGH THE AREA. DAMAGING WINDS WILL BE THE PRIMARY SEVERE
WEATHER THREAT...WITH LARGE HAIL ALSO POSSIBLE. HOWEVER...AN
ISOLATED TORNADO CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NORTHWEST WINDS BEHIND THE FRONT WILL GUST FROM 30 TO 35 MPH ON
MONDAY.

PERIODIC THUNDERSTORM CHANCES WILL OCCUR TOWARD THE END OF THE
WEEK...FROM THURSDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT...WITH THE MOST LIKELY
TIME FRAME BETWEEN 9 PM AND 2 AM.

ILZ044>046-054>057-061>063-066>068-071>073-041100-
CHAMPAIGN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DOUGLAS-EDGAR-
EFFINGHAM-JASPER-LAWRENCE-MOULTRIE-PIATT-RICHLAND-SHELBY-
VERMILION-
310 PM CDT SUN APR 3 2011

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

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

.DAY ONE...TONIGHT

STRONG SOUTHERLY WINDS WILL GUST FROM 45 TO 50 MPH INTO EARLY
EVENING...THEN SLOWLY DIMINISH THE REMAINDER OF THE EVENING.

SEVERE STORMS ARE POSSIBLE TONIGHT...PRIMARILY AFTER MIDNIGHT...
AS A STRONG COLD FRONT PUSHES THROUGH THE AREA. DAMAGING WINDS
WILL BE THE PRIMARY SEVERE WEATHER THREAT. LARGE HAIL IS ALSO
POSSIBLE...PRIMARILY IN AREAS NORTH OF I-70.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SCATTERED THUNDERSTORMS WILL CONTINUE INTO MONDAY MORNING...BUT
WILL DIMINISH BY MIDDAY AS THE FRONT PUSHES FURTHER AWAY FROM THE
REGION.

PERIODIC THUNDERSTORM CHANCES WILL OCCUR TOWARD THE END OF THE
WEEK...FROM THURSDAY THROUGH SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT...PRIMARILY AFTER MIDNIGHT.

GEELHART

In the hours before

Special weather statement, Apr 3, 11:20 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1120 PM CDT SUN APR 3 2011

ILZ030-040445-
MARSHALL-
1120 PM CDT SUN APR 3 2011

...SIGNIFICANT WEATHER ALERT FOR WESTERN MARSHALL COUNTY UNTIL 1145
PM CDT...

AT 1118 PM CDT...SATELLITE IMAGERY AND NATIONAL WEATHER SERVICE
DOPPLER RADAR INDICATED THAT THUNDERSTORMS WERE RAPIDLY DEVELOPING
NEAR HENRY...OR NEAR LACON...MOVING NORTHEAST AT 70 MPH.

PENNY SIZE HAIL...AND WINDS AROUND 55 MPH ARE EXPECTED WITH THIS
STORM.

PEOPLE IN MARSHALL COUNTY...INCLUDING THE CITY OF HENRY...SHOULD
MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE
WARNINGS...AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE
WEATHER THREATEN.

LAT...LON 4114 8932 4111 8933 4111 8925 4110 8920
      4097 8945 4097 8948 4112 8958 4115 8945
      4115 8938
TIME...MOT...LOC 0420Z 241DEG 61KT 4110 8937

AEJ

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 12:11 AM CDTSpecial Weather StatementILXFulton, Knox, Peoria, Stark49 min
Apr 4, 12:25 AM CDTSpecial Weather StatementILXCass, Mason, Menard, Schuyler50 min
Apr 4, 12:41 AM CDTSevere Thunderstorm WarningILXCass, Fulton, Logan, Mason, Menard, Peoria and 2 more49 min
Apr 4, 5:11 AM CDTSevere Thunderstorm WarningILXClark, Crawford, Cumberland, Jasper35 min
Apr 4, 8:08 AM CDTSpecial Weather StatementILXClark, Crawford52 min

Nearby

Special Weather Statements in Illinois, 2011Every special weather statement in 2011

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.