Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Lincoln, IL

February 27, 2011McLean County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Feb 27, 2011, 8:44 PM CST for McLean County, Illinois. It was in force for 46 min. 8 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 27, 2011, 8:44 PM CST (02:44 UTC)
Expired: Feb 27, 2011, 9:30 PM CST
In force: 46 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County McLean County, IL

The radar

The Lincoln radar (KILX), 70 km from the middle of the area, began a volume at 02:47 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.

What was reported inside it

Time	Report	Where
Feb 27, 8:48 PM CST	HAIL 1.75	3 Nw Shirley, IL
Feb 27, 8:50 PM CST	HAIL 0.5	3 Sw Bloomington, IL
Feb 27, 8:52 PM CST	HAIL 0.75	Bloomington, IL
Feb 27, 8:55 PM CST	HAIL 0.5	2 Ese Bloomington, IL
Feb 27, 8:56 PM CST	HAIL 1	1 N Normal, IL
Feb 27, 8:57 PM CST	HAIL 0.5	3 Ne Bloomington, IL
Feb 27, 9:00 PM CST	HAIL 0.88	3 Ne Normal, IL
Feb 27, 9:03 PM CST	HAIL 0.75	Bloomington, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 27, 5:33 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.7 hours before the alert went out and 56 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: 124 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

534 
WUUS53 KILX 280244
SVRILX
ILC113-280330-
/O.NEW.KILX.SV.W.0009.110228T0244Z-110228T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
844 PM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 930 PM CST.

* AT 842 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
  EAST OF STANFORD...OR 9 MILES SOUTHWEST OF BLOOMINGTON...AND MOVING
  NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLOOMINGTON...CARLOCK...NORMAL...HUDSON...TOWANDA...COOKSVILLE...
  LEXINGTON...COLFAX...CHENOA...SHIRLEY...BLOOMINGTON AIRPORT...
  HOLDER...LAKE BLOOMINGTON...PLEASANT HILL...ANCHOR...WESTON AND
  CROPSEY.

THIS INCLUDES INTERSTATE 39 BETWEEN MILE MARKERS 0 AND 9.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 148 AND 187.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 120 AND 140.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4075 8858 4062 8857 4062 8846 4054 8846
      4034 8912 4053 8927 4063 8907 4063 8905
      4065 8904 4076 8881 4076 8859
TIME...MOT...LOC 0244Z 239DEG 46KT 4043 8910
WIND...HAIL 60MPH 1.00IN

$$

GEELHART

3 follow-up statements

823 
WWUS53 KILX 280252
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
852 PM CST SUN FEB 27 2011

ILC113-280330-
/O.CON.KILX.SV.W.0009.000000T0000Z-110228T0330Z/
MCLEAN IL-
852 PM CST SUN FEB 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MCLEAN COUNTY UNTIL 930 PM CST...

AT 850 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
BLOOMINGTON...MOVING NORTHEAST AT 55 MPH.

AT 850 PM...AN OFF DUTY WEATHER SERVICE EMPLOYEE REPORTED DIME
SIZE HAIL ON THE SOUTHWEST SIDE OF BLOOMINGTON.

LOCATIONS IMPACTED INCLUDE...
  HUDSON...TOWANDA...COOKSVILLE...LEXINGTON...COLFAX...CHENOA...
  BLOOMINGTON AIRPORT...LAKE BLOOMINGTON...PLEASANT HILL...ANCHOR...
  WESTON AND CROPSEY.

THIS INCLUDES INTERSTATE 39 BETWEEN MILE MARKERS 0 AND 8.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 153 AND 187.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 121 AND 138.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN LINCOLN.

&&

LAT...LON 4075 8858 4067 8858 4067 8857 4062 8857
      4062 8846 4054 8846 4040 8906 4052 8921
      4063 8905 4076 8881 4076 8859
TIME...MOT...LOC 0252Z 239DEG 46KT 4048 8898
WIND...HAIL 60MPH 1.00IN

$$

GEELHART

873 
WWUS53 KILX 280304
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
904 PM CST SUN FEB 27 2011

ILC113-280330-
/O.CON.KILX.SV.W.0009.000000T0000Z-110228T0330Z/
MCLEAN IL-
904 PM CST SUN FEB 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MCLEAN COUNTY UNTIL 930 PM CST...

AT 900 PM CST...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER NORMAL...MOVING
NORTHEAST AT 55 MPH.

THIS STORM PRODUCED GOLFBALL SIZE HAIL ABOUT 7 MILES WEST OF
BLOOMINGTON. IN ADDITION...SEVERAL SPOTTERS HAVE REPORTED HAIL 
FROM DIME TO QUARTER SIZE ACROSS THE BLOOMINGTON NORMAL AREA.

LOCATIONS IMPACTED INCLUDE...
  COOKSVILLE...LEXINGTON...COLFAX...CHENOA...PLEASANT HILL...
  ANCHOR...WESTON AND CROPSEY.

THIS INCLUDES INTERSTATE 39 BETWEEN MILE MARKERS 0 AND 5...AND 
INTERSTATE 55 BETWEEN MILE MARKERS 164 AND 186.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN LINCOLN.

&&

LAT...LON 4045 8892 4056 8906 4062 8899 4074 8878
      4076 8859 4075 8858 4067 8858 4067 8857
      4062 8857 4062 8846 4054 8846
TIME...MOT...LOC 0301Z 239DEG 46KT 4054 8885
WIND...HAIL 60MPH 1.00IN

$$
GEELHART

875 
WWUS53 KILX 280326
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
926 PM CST SUN FEB 27 2011

ILC113-280336-
/O.EXP.KILX.SV.W.0009.000000T0000Z-110228T0330Z/
MCLEAN IL-
926 PM CST SUN FEB 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MCLEAN COUNTY WILL
EXPIRE AT 930 PM CST...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM. 

LAT...LON 4045 8892 4056 8906 4062 8899 4074 8878
      4076 8859 4075 8858 4067 8858 4067 8857
      4062 8857 4062 8846 4054 8846
TIME...MOT...LOC 0326Z 239DEG 46KT 4070 8849

$$

GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 6:52 PM CST	Severe Thunderstorm Warning	ILX	Fulton, Schuyler	38 min
Feb 27, 7:19 PM CST	Severe Thunderstorm Warning	ILX	Fulton, Mason, Tazewell	41 min
Feb 27, 7:40 PM CST	Special Weather Statement	ILX	Mason, Menard, Tazewell	50 min
Feb 27, 7:56 PM CST	Special Weather Statement	ILX	Peoria, Tazewell	49 min
Feb 27, 8:14 PM CST	Severe Thunderstorm Warning	ILX	Logan, McLean, Tazewell	31 min
Feb 27, 8:25 PM CST	Severe Thunderstorm Warning	ILX	Cass, Fulton, Mason, Schuyler	35 min
Feb 27, 8:30 PM CST	Special Weather Statement	ILX	Christian, Moultrie, Shelby	30 min
Feb 27, 8:33 PM CST	Severe Thunderstorm Warning	ILX	Fulton, Peoria, Tazewell	32 min
Feb 27, 8:42 PM CST	Special Weather Statement	ILX	Morgan, Scott	33 min
Feb 27, 8:45 PM CST	Freezing Rain Advisory	ILX	Knox, Stark	5 hr
Feb 27, 9:17 PM CST	Severe Thunderstorm Warning	ILX	Christian, Logan, Menard, Sangamon	28 min
Feb 27, 9:19 PM CST	Special Weather Statement	ILX	Coles, Douglas, Edgar	41 min
Feb 27, 9:35 PM CST	Severe Thunderstorm Warning	ILX	Clark, Coles, Douglas, Edgar	40 min
Feb 27, 9:47 PM CST	Special Weather Statement	ILX	DeWitt, Logan, McLean, Macon, Moultrie, Piatt	43 min
Feb 27, 10:11 PM CST	Special Weather Statement	ILX	Lawrence	34 min
Feb 27, 10:43 PM CST	Special Weather Statement	ILX	Crawford, Lawrence	47 min
Feb 27, 11:02 PM CST	River Flood Warning	ILX	Peoria, Tazewell, Woodford	16 days
Feb 27, 11:04 PM CST	Special Weather Statement	ILX	Cass, Logan, Menard, Morgan, Sangamon	56 min
Feb 28, 12:25 AM CST	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Effingham, Jasper, Moultrie, Shelby	44 min
Feb 28, 12:29 AM CST	Severe Thunderstorm Warning	ILX	Clay, Cumberland, Effingham, Jasper, Richland	61 min
Feb 28, 12:59 AM CST	Severe Thunderstorm Warning	ILX	Clark, Edgar	32 min
Feb 28, 1:06 AM CST	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	39 min
Feb 28, 1:18 AM CST	Tornado Warning	ILX	Richland	14 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.