Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 47, NWS Lincoln, IL

April 28, 20124 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 28, 2012, 3:28 PM CDT for 4 counties in Illinois. It was in force for 32 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 28, 2012, 3:28 PM CDT (20:28 UTC)
Expired: Apr 28, 2012, 4:00 PM CDT
In force: 32 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clark County, IL, Crawford County, IL, Cumberland County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 95 km from the middle of the area, began a volume at 20:32 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 28, 3:35 PM CDT	HAIL 1	4 S Rose Hill, IL
Apr 28, 3:41 PM CDT	HAIL 1.5	4 S Rose Hill, 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
Apr 28, 1:48 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.5 hours before the alert went out and 137 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: 1019 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 681 m²/s²
0-3 km storm-relative helicity: 811 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

024 
WUUS53 KILX 282028
SVRILX
ILC023-033-035-079-282100-
/O.NEW.KILX.SV.W.0047.120428T2028Z-120428T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
328 PM CDT SAT APR 28 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CLARK COUNTY IN EAST CENTRAL ILLINOIS...
  NORTHERN CRAWFORD COUNTY IN EAST CENTRAL ILLINOIS...
  SOUTHEASTERN CUMBERLAND COUNTY IN EAST CENTRAL ILLINOIS...
  NORTHERN JASPER COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 400 PM CDT.

* AT 327 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
  HIDALGO...OR 8 MILES NORTH OF NEWTON...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HIDALGO...HAZEL DELL...ANNAPOLIS...EATON...HUTSONVILLE...WEST
  UNION...ROSE HILL...HUNT CITY...YALE...BELLAIR...ORANGE...WEST
  YORK...TRIMBLE AND YORK.

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 3904 8759 3902 8832 3921 8831 3929 8762
      3918 8761 3914 8765 3912 8763 3911 8763
      3910 8761 3909 8762 3908 8759
TIME...MOT...LOC 2028Z 261DEG 35KT 3910 8818
WIND...HAIL 60MPH 1.00IN

$$

GEELHART

1 follow-up statement

312 
WWUS53 KILX 282048
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
348 PM CDT SAT APR 28 2012

ILC023-035-282057-
/O.CAN.KILX.SV.W.0047.000000T0000Z-120428T2100Z/
CLARK IL-CUMBERLAND IL-
348 PM CDT SAT APR 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUMBERLAND AND
SOUTHERN CLARK COUNTIES IS CANCELLED...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 7 PM.

LAT...LON 3904 8759 3902 8816 3913 8817 3917 8766
      3915 8764 3914 8765 3912 8763 3911 8763
      3910 8761 3908 8761 3908 8759
TIME...MOT...LOC 2047Z 271DEG 31KT 3907 8801

$$

ILC033-079-282100-
/O.CON.KILX.SV.W.0047.000000T0000Z-120428T2100Z/
JASPER IL-CRAWFORD IL-
348 PM CDT SAT APR 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
CRAWFORD AND EAST CENTRAL JASPER COUNTIES UNTIL 400 PM CDT...

AT 346 PM CDT...TRAINED SPOTTERS REPORTED A SEVERE THUNDERSTORM 
PRODUCING PING PONG BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 
60 MPH.  THIS STORM WAS LOCATED NEAR WILLOW HILL...OR 9 MILES 
NORTHEAST OF NEWTON...MOVING EAST AT 35 MPH. PING PONG BALL SIZE 
HAIL WAS REPORTED 4 MILES SOUTH OF ROSE HILL AT 341 PM.

LOCATIONS IMPACTED INCLUDE...
  EATON...ANNAPOLIS...HUTSONVILLE...BELLAIR...TRIMBLE AND WEST YORK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3904 8759 3902 8816 3913 8817 3917 8766
      3915 8764 3914 8765 3912 8763 3911 8763
      3910 8761 3908 8761 3908 8759
TIME...MOT...LOC 2047Z 271DEG 31KT 3907 8801
WIND...HAIL 60MPH 1.50IN

$$

GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 3:21 PM CDT	Special Weather Statement	ILX	Jasper	39 min
Apr 28, 3:49 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Jasper	41 min
Apr 28, 3:57 PM CDT	Tornado Warning	ILX	Crawford	37 min
Apr 28, 4:38 PM CDT	Special Weather Statement	ILX	Sangamon	67 min
Apr 28, 6:45 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	60 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.