Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 34, NWS Lincoln, IL

March 30, 2012Cumberland County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Mar 30, 2012, 3:42 PM CDT for Cumberland County, Illinois. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 30, 2012, 3:42 PM CDT (20:42 UTC)
Expired: Mar 30, 2012, 4:15 PM CDT
In force: 33 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cumberland County, IL

The radar

The Evansville,IN radar (KVWX), 125 km from the middle of the area, began a volume at 20:45 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.

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 30, 2:51 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.7 hours before the alert went out and 99 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: 164 J/kg
Mixed-layer CIN: -244 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 230 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.

310 
WUUS53 KILX 302042
SVRILX
ILC035-302115-
/O.NEW.KILX.SV.W.0034.120330T2042Z-120330T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
342 PM CDT FRI MAR 30 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CUMBERLAND COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 415 PM CDT.

* AT 340 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
  JANESVILLE...OR NEAR TOLEDO...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GREENUP AND UNION CENTER.

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 3925 8835 3937 8836 3938 8834 3938 8801
      3935 8801 3924 8801
TIME...MOT...LOC 2042Z 270DEG 27KT 3934 8823
WIND...HAIL 60MPH 1.00IN

$$

BAK

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 2:52 PM CDT	Special Weather Statement	ILX	Clark	53 min
Mar 30, 2:58 PM CDT	Special Weather Statement	ILX	Shelby	62 min
Mar 30, 3:14 PM CDT	Special Weather Statement	ILX	Clark	61 min
Mar 30, 3:17 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Jasper	58 min
Mar 30, 3:24 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	54 min
Mar 30, 4:15 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Cumberland	36 min
Mar 30, 5:00 PM CDT	Special Weather Statement	ILX	Crawford	60 min
Mar 30, 5:09 PM CDT	Special Weather Statement	ILX	Clay	66 min
Mar 30, 6:48 PM CDT	Special Weather Statement	ILX	Richland	27 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.