Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 41, NWS Lincoln, IL

April 1, 2012Tazewell County, Woodford County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 1, 2012, 3:40 AM CDT for Tazewell County, Woodford County, Illinois. It was in force for 39 min. 1 report 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 1, 2012, 3:40 AM CDT (08:40 UTC)
Expired
Apr 1, 2012, 4:19 AM CDT
In force
39 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Tazewell County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 64 km from the middle of the area, began a volume at 08:41 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

TimeReportWhereRemark
Apr 1, 3:42 AM CDTHAIL 0.883 Se Spring Bay, 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.

IssuedProductOfficeLasted
Mar 31, 9:24 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 8.7 hours before the alert went out and 80 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 2012-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1987 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
248 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

136 
WUUS53 KILX 010840
SVRILX
ILC179-203-010945-
/O.NEW.KILX.SV.W.0041.120401T0840Z-120401T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
340 AM CDT SUN APR 1 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL TAZEWELL COUNTY IN CENTRAL ILLINOIS...
  WOODFORD COUNTY IN CENTRAL ILLINOIS...

* UNTIL 445 AM CDT.

* AT 337 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR SPRING BAY...OR 6 MILES NORTHEAST OF
  PEORIA...AND MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EUREKA...GERMANTOWN HILLS...METAMORA...ROANOKE...SECOR AND
  CAZENOVIA.

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 4079 8904 4068 8904 4063 8909 4061 8912
      4061 8914 4074 8954 4089 8948
TIME...MOT...LOC 0841Z 294DEG 25KT 4078 8948
WIND...HAIL <50MPH 1.00IN

$$

SMITH
2 follow-up statements
130 
WWUS53 KILX 010903
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
403 AM CDT SUN APR 1 2012

ILC179-203-010945-
/O.CON.KILX.SV.W.0041.000000T0000Z-120401T0945Z/
TAZEWELL IL-WOODFORD IL-
403 AM CDT SUN APR 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
WOODFORD AND NORTHEASTERN TAZEWELL COUNTIES UNTIL 445 AM CDT...

AT 400 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR EUREKA...MOVING SOUTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  EUREKA AND SECOR.

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 4076 8933 4076 8904 4068 8904 4063 8909
      4061 8912 4061 8914 4071 8946
TIME...MOT...LOC 0904Z 294DEG 25KT 4071 8929
WIND...HAIL <50MPH 1.00IN

$$
GEELHART
040 
WWUS53 KILX 010919
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
419 AM CDT SUN APR 1 2012

ILC179-203-010929-
/O.CAN.KILX.SV.W.0041.000000T0000Z-120401T0945Z/
TAZEWELL IL-WOODFORD IL-
419 AM CDT SUN APR 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WOODFORD AND
NORTHEASTERN TAZEWELL COUNTIES IS CANCELLED...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL LOCATED ACROSS THE 
AREA...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 
6 AM. REMAIN ALERT FOR THE POSSIBILITY OF MORE SEVERE WEATHER.

LAT...LON 4076 8933 4076 8904 4068 8904 4063 8909
      4061 8912 4061 8914 4071 8946
TIME...MOT...LOC 0919Z 294DEG 25KT 4067 8916

$$
GEELHART

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 1:06 AM CDTSevere Thunderstorm WarningILXKnox54 min
Apr 1, 1:59 AM CDTSevere Thunderstorm WarningILXKnox46 min
Apr 1, 2:20 AM CDTSevere Thunderstorm WarningILXPeoria, Stark55 min
Apr 1, 2:42 AM CDTSpecial Weather StatementILXTazewell63 min
Apr 1, 2:48 AM CDTSevere Thunderstorm WarningILXPeoria, Tazewell57 min
Apr 1, 3:15 AM CDTSevere Thunderstorm WarningILXPeoria, Woodford30 min
Apr 1, 3:43 AM CDTSevere Thunderstorm WarningILXMcLean, Tazewell47 min
Apr 1, 4:22 AM CDTSevere Thunderstorm WarningILXMcLean, Woodford38 min
Apr 1, 8:23 AM CDTSpecial Weather StatementILXVermilion37 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.