Alert archive / Illinois / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 3, NWS Lincoln, IL

April 14, 1994Carroll County, Stephenson County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 14, 1994, 11:34 PM CDT for Carroll County, Stephenson County, Illinois. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Apr 14, 1994, 11:34 PM CDT (04:34 UTC)
Expired
Apr 15, 1994, 12:15 AM CDT
In force
41 min
Issued by
NWS Lincoln, IL
Area
Whole counties

Counties Carroll County, IL, Stephenson County, IL

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 4.6 hours before the alert went out and 424 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1994-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1994-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
2199 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
178 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.

000 
TTAA00 KRFD 150434
SVRRFD
ILC177-015-150515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ROCKFORD IL
1134 PM CDT THU APR 14 1994

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTH CENTRAL PART OF ILLINOIS
      STEPHENSON...

   IN THE NORTHWEST PART OF ILLINOIS
      CARROLL...

AT 1120 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM LOCATED
10 MILES SOUTHEAST OF MT CARROLL IN CENTRAL CARROLL COUNTY.
THIS STORM IS MOVING TO THE NORTHEAST AT 40 MPH AND ALREADY
HAS A HISTORY OF PRODUCING PEA TO GOLF BALL SIZE HAIL.

SOME COMMUNITIES THAT WILL BE AFFECTED BY THIS SEVERE THUNDERSTORM...
LANARK...SHANNON...PEARL CITY..AND FREEPORT

IF YOU ARE IN THE PATH OF THIS STORM...MOVE OUT OF AREAS THAT ARE
PRONE TO FLOODING AND TAKE SHELTER.  DAMAGING WINDS...LARGE HAIL
AND VERY HEAVY RAIN IS IMMINENT! REMEMBER.
..SEVERE THUNDERSTORMS
CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO WARNING!

BRONIARCZYK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 12:05 AM CDTSevere Thunderstorm WarningILXWinnebago27 min
Apr 15, 3:13 AM CDTSevere Thunderstorm WarningILXCarroll32 min
Apr 15, 3:37 AM CDTSevere Thunderstorm WarningILXLee, Ogle53 min
Apr 15, 4:01 AM CDTSevere Thunderstorm WarningILXWinnebago34 min
Apr 15, 4:06 AM CDTSevere Thunderstorm WarningILXMenard39 min
Apr 15, 4:39 AM CDTSevere Thunderstorm WarningILXPiatt45 min
Apr 15, 4:39 AM CDTSevere Thunderstorm WarningILXChampaign46 min
Apr 15, 4:59 AM CDTSevere Thunderstorm WarningILXMcLean61 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1994Every severe thunderstorm warning in 1994

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.