Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 59, NWS Lincoln, IL

May 4, 2012McLean County, Woodford County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 4, 2012, 12:52 AM CDT for McLean County, Woodford County, Illinois. It was in force for 35 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
May 4, 2012, 12:52 AM CDT (05:52 UTC)
Expired
May 4, 2012, 1:27 AM CDT
In force
35 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

Counties McLean County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 82 km from the middle of the area, began a volume at 05:54 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
May 3, 11:34 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.9 hours before the alert went out and 73 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 2012-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1905 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 2012-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.193958Sfc1 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
1905 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1071 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

636 
WUUS53 KILX 040552
SVRILX
ILC113-203-040645-
/O.NEW.KILX.SV.W.0059.120504T0552Z-120504T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1252 AM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MCLEAN COUNTY IN CENTRAL ILLINOIS...
  EASTERN WOODFORD COUNTY IN CENTRAL ILLINOIS...

* UNTIL 145 AM CDT.

* AT 1249 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR MINONK...OR 18 MILES
  NORTHEAST OF EUREKA...AND MOVING EAST AT 40 MPH. NICKEL SIZE HAIL
  MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  EL PASO...GRIDLEY...LEXINGTON...CHENOA...PANOLA...EVERGREEN LAKE...
  KAPPA...LAKE BLOOMINGTON...PLEASANT HILL AND WESTON.

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 4092 8892 4076 8892 4076 8859 4062 8857
      4062 8846 4061 8910 4093 8910 4093 8896
TIME...MOT...LOC 0552Z 285DEG 35KT 4091 8904
WIND...HAIL 60MPH 0.88IN

$$

CHS
1 follow-up statement
384 
WWUS53 KILX 040627
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
127 AM CDT FRI MAY 4 2012

ILC113-203-040637-
/O.CAN.KILX.SV.W.0059.000000T0000Z-120504T0645Z/
MCLEAN IL-WOODFORD IL-
127 AM CDT FRI MAY 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WOODFORD AND NORTHERN
MCLEAN COUNTIES IS CANCELLED...

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

LAT...LON 4092 8892 4076 8892 4076 8859 4062 8857
      4062 8846 4061 8910 4093 8910 4093 8896
TIME...MOT...LOC 0627Z 285DEG 35KT 4082 8861

$$

CHS

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 7:26 PM CDTSpecial Weather StatementILXMarshall64 min
May 3, 7:36 PM CDTSevere Thunderstorm WarningILXMarshall54 min
May 3, 8:24 PM CDTSevere Thunderstorm WarningILXMarshall51 min
May 3, 8:39 PM CDTFlash Flood WarningILXMarshall6 hr
May 3, 11:16 PM CDTSevere Thunderstorm WarningILXKnox44 min
May 3, 11:29 PM CDTSevere Thunderstorm WarningILXMarshall, Peoria, Stark61 min
May 4, 12:07 AM CDTSevere Thunderstorm WarningILXPeoria, Tazewell, Woodford53 min
May 4, 12:29 AM CDTSevere Thunderstorm WarningILXMarshall, Peoria46 min
May 4, 2:29 AM CDTFlash Flood WarningILXMarshall6 hr
May 4, 8:47 AM CDTSevere Thunderstorm WarningILXClay, Jasper, Richland43 min
May 4, 1:22 PM CDTSevere Thunderstorm WarningILXLawrence38 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012

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.