Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 21, NWS Des Moines, IA

April 24, 1994Carroll County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 24, 1994, 6:43 PM CDT for Carroll County, Iowa. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Apr 24, 1994, 6:43 PM CDT (23:43 UTC)
Expired
Apr 24, 1994, 7:15 PM CDT
In force
32 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Carroll County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.7 hours before the alert went out and 148 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, Omaha, NE at 12:00Z on 1994-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 102 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 12:00Z on 1994-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 330 square meters per square second.19395878Sfc1 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
102 J/kg
Mixed-layer CIN
-296 J/kg
Mixed-layer LCL
991 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
330 m²/s²
0-3 km storm-relative helicity
341 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 KDSM 250010 COR
SVRDSM
IAC027-250015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION IN FIRST PARAGRAPH
NATIONAL WEATHER SERVICE DES MOINES IA
710 PM CDT SUN APR 24 1994

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONSS...

IN WEST CENTRAL IOWA

   ...SOUTHERN CARROLL COUNTY

AT 636 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 8 MILES
NORTHWEST OF AUDUBON...ABOUT 60 MILES NORTHEAST OF COUNCIL BLUFFS. THE
STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR. THE STORM WILL DEDHAM
ABOUT 655 PM.  DEDHAM IS ABOUT 65 MILES NORTHWEST OF DES MOINES.

PLEASE REPORT INSTANCES OF SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT
AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.


WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.


CHB

Nearby

Severe Thunderstorm Warnings in Iowa, 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.