Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 10, NWS Lincoln, IL

March 2, 2012Clay County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Mar 2, 2012, 12:05 PM CST for Clay County, Illinois. It was in force for 40 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: Mar 2, 2012, 12:05 PM CST (18:05 UTC)
Expired: Mar 2, 2012, 12:45 PM CST
In force: 40 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Clay County, IL

The radar

The Evansville,IN radar (KVWX), 76 km from the middle of the area, began a volume at 18:05 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
Mar 2, 12:19 PM CST	HAIL 0.75	Xenia, IL
Mar 2, 12:33 PM CST	HAIL 0.25	Flora, 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
Mar 2, 9:54 AM CST	Tornado Watch PDS	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.1 hours before the alert went out and 164 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1770 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

815 
WUUS53 KILX 021805
SVRILX
ILC025-021845-
/O.NEW.KILX.SV.W.0010.120302T1805Z-120302T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1205 PM CST FRI MAR 2 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CLAY COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 1245 PM CST.

* AT NOON CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
  SOUTHEAST OF SALEM...AND MOVING NORTHEAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FLORA...XENIA...LOUISVILLE...CLAY CITY...SAILOR SPRINGS...INGAHAM
  AND WENDELIN.

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 3860 8870 3861 8871 3873 8870 3885 8830
      3885 8826 3873 8826 3872 8829 3866 8828
      3864 8829 3862 8829 3861 8827 3860 8827
TIME...MOT...LOC 1805Z 247DEG 48KT 3859 8883
WIND...HAIL 60MPH 1.75IN

$$

BARNES

2 follow-up statements

843 
WWUS53 KILX 021828
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1228 PM CST FRI MAR 2 2012

ILC025-021845-
/O.CON.KILX.SV.W.0010.000000T0000Z-120302T1845Z/
CLAY IL-
1228 PM CST FRI MAR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN CLAY
COUNTY UNTIL 1245 PM CST...

AT 1226 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
FLORA...MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  CLAY CITY...SAILOR SPRINGS...INGAHAM AND WENDELIN.

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 3860 8870 3861 8871 3873 8870 3885 8830
      3885 8826 3873 8826 3872 8829 3866 8828
      3864 8829 3862 8829 3861 8827 3860 8827
TIME...MOT...LOC 1828Z 247DEG 48KT 3867 8847
WIND...HAIL 60MPH 1.75IN

$$

BARNES

588 
WWUS53 KILX 021841
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1241 PM CST FRI MAR 2 2012

ILC025-021851-
/O.EXP.KILX.SV.W.0010.000000T0000Z-120302T1845Z/
CLAY IL-
1241 PM CST FRI MAR 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CLAY COUNTY WILL
EXPIRE AT 1245 PM CST...

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

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 6 PM CST.

LAT...LON 3860 8870 3861 8871 3873 8870 3885 8830
      3885 8826 3873 8826 3872 8829 3866 8828
      3864 8829 3862 8829 3861 8827 3860 8827
TIME...MOT...LOC 1841Z 247DEG 48KT 3873 8826

$$

BARNES

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 3:41 AM CST	Wind Advisory	ILX	Champaign, Christian, Clark, Clay, Coles, Crawford and 16 more	16 hr
Mar 2, 7:20 AM CST	Severe Thunderstorm Warning	ILX	Christian, Coles, Cumberland, Effingham, Moultrie, Shelby	40 min
Mar 2, 8:00 AM CST	Severe Thunderstorm Warning	ILX	Clark, Coles, Cumberland, Douglas, Edgar, Moultrie and 1 more	45 min
Mar 2, 8:09 AM CST	Special Weather Statement	ILX	Sangamon	51 min
Mar 2, 8:22 AM CST	Severe Thunderstorm Warning	ILX	Clark, Edgar	38 min
Mar 2, 8:42 AM CST	Severe Thunderstorm Warning	ILX	Edgar	33 min
Mar 2, 9:06 AM CST	Special Weather Statement	ILX	Macon	54 min
Mar 2, 11:22 AM CST	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	26 min
Mar 2, 11:30 AM CST	Severe Thunderstorm Warning	ILX	Clark, Coles, Edgar	30 min
Mar 2, 1:15 PM CST	Tornado Warning	ILX	Lawrence	13 min

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.