Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS Lincoln, IL

April 28, 2012Crawford County, Jasper County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 28, 2012, 3:49 PM CDT for Crawford County, Jasper County, Illinois. It was in force for 41 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 28, 2012, 3:49 PM CDT (20:49 UTC)
Expired: Apr 28, 2012, 4:30 PM CDT
In force: 41 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Crawford County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 88 km from the middle of the area, began a volume at 20:50 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, 4:00 PM CDT	HAIL 1.5	Oblong, IL
Apr 28, 4:15 PM CDT	HAIL 1.5	Robinson, IL
Apr 28, 4:15 PM CDT	HAIL 1.75	Robinson, IL	HAIL SHREDDED LEAVES
Apr 28, 4:25 PM CDT	HAIL 0.75	Palestine, 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, 8.8 hours before the alert went out and 146 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.

306 
WUUS53 KILX 282049
SVRILX
ILC033-079-282130-
/O.NEW.KILX.SV.W.0048.120428T2049Z-120428T2130Z/

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CRAWFORD COUNTY IN EAST CENTRAL ILLINOIS...
  EAST CENTRAL JASPER COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 430 PM CDT.

* AT 346 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM PRODUCING PING PONG BALL SIZE HAIL.  THIS STORM WAS
  LOCATED NEAR WILLOW HILL...OR 8 MILES NORTHEAST OF NEWTON...AND
  MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROBINSON...OBLONG...EATON...NEW HEBRON...HUTSONVILLE...PALESTINE...
  BELLAIR...STOY...TRIMBLE AND CRAWFORD COUNTY AIRPORT.

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 3892 8752 3900 8812 3915 8803 3914 8765
      3912 8763 3911 8763 3910 8761 3909 8762
      3908 8759 3899 8756 3896 8751
TIME...MOT...LOC 2049Z 275DEG 37KT 3905 8800
WIND...HAIL <50MPH 1.50IN

$$

BAK

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, 3:28 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Jasper	32 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.