Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 44, NWS Lincoln, IL

April 25, 2012DeWitt County, Logan County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 25, 2012, 4:13 PM CDT for DeWitt County, Logan County, Illinois. It was in force for 30 min. 4 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 25, 2012, 4:13 PM CDT (21:13 UTC)
Expired: Apr 25, 2012, 4:43 PM CDT
In force: 30 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties DeWitt County, IL, Logan County, IL

The radar

The Lincoln radar (KILX), 13 km from the middle of the area, began a volume at 21:15 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 25, 4:20 PM CDT	TSTM WND DMG	1 N Lincoln, IL	TREE DOWN AT HAMILTON AND TREMONT ST.
Apr 25, 4:20 PM CDT	TSTM WND DMG	3 Nnw Lincoln, IL	TREE BLOWN DOWN ACROSS ROUTE 121 AND 2000TH AVENUE.
Apr 25, 4:20 PM CDT	HAIL 0.88	Lincoln, IL
Apr 25, 4:44 PM CDT	TSTM WND GST 60	2 N Kenney, 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 12:00Z, 9.2 hours before the alert went out and 51 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: 5 J/kg
Mixed-layer CIN: -495 J/kg
Mixed-layer LCL: 1292 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 174 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.

176 
WUUS53 KILX 252113
SVRILX
ILC039-107-252200-
/O.NEW.KILX.SV.W.0044.120425T2113Z-120425T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
413 PM CDT WED APR 25 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN DE WITT COUNTY IN CENTRAL ILLINOIS...
  LOGAN COUNTY IN CENTRAL ILLINOIS...

* UNTIL 500 PM CDT.

* AT 410 PM 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
  LINCOLN...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LINCOLN...ATLANTA...MOUNT PULASKI...BEASON...CHESTNUT...
  WAYNESVILLE...LATHAM...LAWNDALE...MIDLAND CITY AND HALLSVILLE.

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 4027 8899 4005 8912 4005 8914 4000 8914
      3992 8919 4011 8955 4029 8944
TIME...MOT...LOC 2113Z 284DEG 36KT 4017 8940
WIND...HAIL 60MPH 1.00IN

$$

BARNES

2 follow-up statements

460 
WWUS53 KILX 252126
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
426 PM CDT WED APR 25 2012

ILC039-107-252200-
/O.CON.KILX.SV.W.0044.000000T0000Z-120425T2200Z/
LOGAN IL-DE WITT IL-
426 PM CDT WED APR 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN DE
WITT AND LOGAN COUNTIES UNTIL 500 PM CDT...

AT 419 PM 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
LINCOLN...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  MOUNT PULASKI...BEASON...CHESTNUT...WAYNESVILLE...LATHAM...MIDLAND
  CITY AND HALLSVILLE.

NICKEL SIZED HAIL WAS REPORTED WITH THIS STORM IN LINCOLN AT 420 PM 
CDT. 40 MPH WINDS OCCURRED AT THE NATIONAL WEATHER SERVICE OFFICE 
JUST EAST OF LINCOLN.

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 4027 8899 4005 8912 4005 8914 4000 8914
      3992 8919 4011 8955 4029 8944
TIME...MOT...LOC 2124Z 284DEG 36KT 4014 8926
WIND...HAIL 60MPH 1.00IN

$$

085 
WWUS53 KILX 252143
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
443 PM CDT WED APR 25 2012

ILC039-107-252154-
/O.CAN.KILX.SV.W.0044.000000T0000Z-120425T2200Z/
LOGAN IL-DE WITT IL-
443 PM CDT WED APR 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN DE WITT AND LOGAN
COUNTIES IS CANCELLED...

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

LAT...LON 4027 8899 4005 8912 4005 8914 4000 8914
      3992 8919 4011 8955 4029 8944
TIME...MOT...LOC 2144Z 284DEG 36KT 4009 8901

$$

BARNES

Nearby

Severe Thunderstorm Warnings in Illinois, 2012 Every 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.