Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 24, NWS Lincoln, IL

April 11, 2011Champaign County, Piatt County, Vermilion County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 11, 2011, 1:13 AM CDT for Champaign County, Piatt County, Vermilion County, Illinois. It was in force for 47 min. 2 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: Apr 11, 2011, 1:13 AM CDT (06:13 UTC)
Expired: Apr 11, 2011, 2:00 AM CDT
In force: 47 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Champaign County, IL, Piatt County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 106 km from the middle of the area, began a volume at 06:12 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	Remark
Apr 11, 1:30 AM CDT	TSTM WND DMG	Fisher, IL	A 3.5 TO 4 FOOT DIAMETER COTTONWOOD TREE 60 FEET TALL SNAPPED OFF AT THE BASE ALONG A CREEK DUE TO HIGH WINDS.
Apr 11, 1:45 AM CDT	TSTM WND GST 60	3 W Bismarck, IL

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.2 hours before the alert went out and 44 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: 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.

525 
WUUS53 KILX 110613
SVRILX
ILC019-147-183-110700-
/O.NEW.KILX.SV.W.0024.110411T0613Z-110411T0700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
113 AM CDT MON APR 11 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHAMPAIGN COUNTY IN EAST CENTRAL ILLINOIS...
  NORTHEASTERN PIATT COUNTY IN CENTRAL ILLINOIS...
  VERMILION COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 200 AM CDT.

* AT 112 AM CDT...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 NEAR
  SEYMOUR...OR NEAR CHAMPAIGN...AND MOVING EAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHAMPAIGN...RANTOUL...DANVILLE...SAVOY...FISHER...PHILO...URBANA...
  THOMASBORO...SIDNEY...ST. JOSEPH...HOMER...OGDEN...GIFFORD...
  FITHIAN...FAIRMOUNT...OAKWOOD...CATLIN...RANKIN...POTOMAC AND
  WESTVILLE.

THIS INCLUDES INTERSTATE 57 BETWEEN MILE MARKERS 224 AND 257.

THIS INCLUDES INTERSTATE 72 BETWEEN MILE MARKERS 170 AND 182.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 165 AND 219.

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.

&&

LAT...LON 3993 8845 4019 8856 4040 8835 4040 8794
      4048 8794 4048 8753 4003 8753
TIME...MOT...LOC 0613Z 249DEG 58KT 4013 8833
WIND...HAIL 60MPH 1.00IN

$$

SMITH

3 follow-up statements

183 
WWUS53 KILX 110626
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
126 AM CDT MON APR 11 2011

ILC147-110636-
/O.CAN.KILX.SV.W.0024.000000T0000Z-110411T0700Z/
PIATT IL-
126 AM CDT MON APR 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PIATT COUNTY IS
CANCELLED...

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

LAT...LON 3995 8830 4016 8828 4039 8828 4040 8794
      4048 8794 4048 8753 4003 8753
TIME...MOT...LOC 0626Z 249DEG 58KT 4020 8807

$$

ILC019-183-110700-
/O.CON.KILX.SV.W.0024.000000T0000Z-110411T0700Z/
VERMILION IL-CHAMPAIGN IL-
126 AM CDT MON APR 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
CHAMPAIGN AND VERMILION COUNTIES UNTIL 200 AM CDT...

AT 122 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 5 MILES SOUTHEAST OF THOMASBORO...OR
7 MILES NORTHEAST OF CHAMPAIGN...MOVING EAST AT 65 MPH.

LOCATIONS IMPACTED INCLUDE...
  DANVILLE...HOMER...OGDEN...GIFFORD...FITHIAN...FAIRMOUNT...
  OAKWOOD...CATLIN...RANKIN...POTOMAC...WESTVILLE...TILTON...
  ROSSVILLE...HOOPESTON...FLATVILLE...LUDLOW...ROYAL...ARMSTRONG...
  COLLISON AND KICKAPOO STATE PARK.

THIS INCLUDES INTERSTATE 57 BETWEEN MILE MARKERS 224 AND 256.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 179 AND 219.

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.

&&

LAT...LON 3995 8830 4016 8828 4039 8828 4040 8794
      4048 8794 4048 8753 4003 8753
TIME...MOT...LOC 0626Z 249DEG 58KT 4020 8807
WIND...HAIL 60MPH <.75IN

$$

SMITH

273 
WWUS53 KILX 110635
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
135 AM CDT MON APR 11 2011

ILC019-183-110700-
/O.CON.KILX.SV.W.0024.000000T0000Z-110411T0700Z/
VERMILION IL-CHAMPAIGN IL-
135 AM CDT MON APR 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
CHAMPAIGN AND VERMILION COUNTIES UNTIL 200 AM CDT...

AT 131 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTHEAST OF GIFFORD...OR 12
MILES EAST OF RANTOUL...MOVING EAST AT 65 MPH.

LOCATIONS IMPACTED INCLUDE...
  DANVILLE...RANKIN...CATLIN...POTOMAC...WESTVILLE...TILTON...
  ROSSVILLE...HOOPESTON...COLLISON...KICKAPOO STATE PARK...MIDDLE
  FORK WILDLIFE AREA...HENNING...VERMILION COUNTY AIRPORT...BISMARCK
  AND ALVIN.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 194 AND 219.

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.

&&

LAT...LON 3998 8799 4039 8807 4040 8794 4048 8794
      4048 8753 4003 8753
TIME...MOT...LOC 0635Z 250DEG 57KT 4026 8787
WIND...HAIL 60MPH <.75IN

$$

SMITH

759 
WWUS53 KILX 110656
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
156 AM CDT MON APR 11 2011

ILC019-183-110706-
/O.EXP.KILX.SV.W.0024.000000T0000Z-110411T0700Z/
VERMILION IL-CHAMPAIGN IL-
156 AM CDT MON APR 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHAMPAIGN AND
VERMILION COUNTIES WILL EXPIRE AT 200 AM CDT...

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

LAT...LON 3998 8799 4039 8807 4040 8794 4048 8794
      4048 8753 4003 8753
TIME...MOT...LOC 0656Z 250DEG 57KT 4037 8746

$$

SMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:24 PM CDT	River Flood Warning	ILX	Lawrence	25 hr
Apr 10, 8:58 PM CDT	Special Weather Statement	ILX	Fulton, Schuyler	47 min
Apr 10, 9:50 PM CDT	Special Weather Statement	ILX	Peoria	40 min
Apr 10, 9:55 PM CDT	Special Weather Statement	ILX	Mason	50 min
Apr 10, 10:13 PM CDT	Special Weather Statement	ILX	Tazewell	47 min
Apr 10, 10:28 PM CDT	Special Weather Statement	ILX	McLean	47 min
Apr 10, 10:31 PM CDT	Severe Thunderstorm Warning	ILX	McLean, Mason, Tazewell, Woodford	44 min
Apr 10, 10:35 PM CDT	Special Weather Statement	ILX	Cass, Menard, Morgan, Scott	40 min
Apr 10, 10:47 PM CDT	Special Weather Statement	ILX	McLean	28 min
Apr 10, 10:50 PM CDT	Severe Thunderstorm Warning	ILX	McLean	25 min
Apr 10, 11:12 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Scott	34 min
Apr 11, 12:36 AM CDT	Special Weather Statement	ILX	Moultrie	39 min
Apr 11, 12:58 AM CDT	Special Weather Statement	ILX	Champaign, Piatt, Vermilion	62 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.