Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 22, NWS Lincoln, IL

April 10, 2011McLean County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 10, 2011, 10:50 PM CDT for McLean 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 10, 2011, 10:50 PM CDT (03:50 UTC)
Expired
Apr 10, 2011, 11:15 PM CDT
In force
25 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County McLean County, IL

The radar

The Lincoln radar (KILX), 73 km from the middle of the area, began a volume at 03:53 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.

IssuedProductOfficeLasted
Apr 10, 6:05 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.8 hours before the alert went out and 49 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, Lincoln, IL at 00:00Z on 2011-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1523 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, Lincoln, IL at 00:00Z on 2011-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 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
1523 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1493 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
237 m²/s²
Significant tornado parameter
1.0
Supercell composite
6.7

Open this sounding in Storm Lab

The text

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

120 
WUUS53 KILX 110350
SVRILX
ILC113-110415-
/O.NEW.KILX.SV.W.0022.110411T0350Z-110411T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1050 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCLEAN COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1115 PM CDT.

* AT 1049 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR BLOOMINGTON...AND MOVING
  NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TOWANDA...COOKSVILLE...LEXINGTON...COLFAX...CHENOA...BLOOMINGTON
  AIRPORT...HOLDER...PLEASANT HILL AND ANCHOR.

THIS INCLUDES INTERSTATE 39 BETWEEN MILE MARKERS 0 AND 4.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 154 AND 187.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 125 AND 140.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT MONDAY MORNING FOR
NORTHWESTERN ILLINOIS.

LAT...LON 4064 8856 4062 8857 4062 8854 4057 8848
      4035 8900 4050 8914 4077 8872
TIME...MOT...LOC 0351Z 235DEG 55KT 4048 8896
WIND...HAIL 60MPH <.75IN

$$

SMITH
1 follow-up statement
162 
WWUS53 KILX 110416
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1116 PM CDT SUN APR 10 2011

ILC113-110426-
/O.EXP.KILX.SV.W.0022.000000T0000Z-110411T0415Z/
MCLEAN IL-
1116 PM CDT SUN APR 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR MCLEAN COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 1 AM.

LAT...LON 4064 8856 4062 8857 4062 8854 4057 8848
      4035 8900 4050 8914 4077 8872
TIME...MOT...LOC 0350Z 235DEG 55KT 4047 8897

$$

SMITH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 10, 8:24 PM CDTRiver Flood WarningILXLawrence25 hr
Apr 10, 8:58 PM CDTSpecial Weather StatementILXFulton, Schuyler47 min
Apr 10, 9:50 PM CDTSpecial Weather StatementILXPeoria40 min
Apr 10, 9:55 PM CDTSpecial Weather StatementILXMason50 min
Apr 10, 10:13 PM CDTSpecial Weather StatementILXTazewell47 min
Apr 10, 10:28 PM CDTSpecial Weather StatementILXMcLean47 min
Apr 10, 10:31 PM CDTSevere Thunderstorm WarningILXMcLean, Mason, Tazewell, Woodford44 min
Apr 10, 10:35 PM CDTSpecial Weather StatementILXCass, Menard, Morgan, Scott40 min
Apr 10, 10:47 PM CDTSpecial Weather StatementILXMcLean28 min
Apr 10, 11:12 PM CDTSevere Thunderstorm WarningILXCass, Morgan, Scott34 min
Apr 11, 12:36 AM CDTSpecial Weather StatementILXMoultrie39 min
Apr 11, 12:58 AM CDTSpecial Weather StatementILXChampaign, Piatt, Vermilion62 min
Apr 11, 1:13 AM CDTSevere Thunderstorm WarningILXChampaign, Piatt, Vermilion47 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2011Every severe thunderstorm warning 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.