Alert archive / Iowa / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 2, NWS Des Moines, IA

March 29, 1993Madison County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Mar 29, 1993, 6:14 PM CST for Madison County, Iowa. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Mar 29, 1993, 6:14 PM CST (00:14 UTC)
Expired
Mar 29, 1993, 6:45 PM CST
In force
31 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Madison County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.2 hours before the alert went out and 197 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 00:00Z on 1993-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 945 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1993-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
945 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1075 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 300015
SVRDSM
IAC121-300045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
614 PM CST MON MAR 29 1993
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION(S)...
 
IN SOUTH CENTRAL IOWA
 
   ...MADISON COUNTY
   ...DALLAS COUNTY
 
AT 610 PM...A SEVERE THUNDERSTORM WAS OVER WESTERN MADISON COUNTY 25
MILES SOUTHWEST OF DES MOINES OR 10 MILES WEST OF WINTERSET. THE SEVERE
THUNDERSTORM WAS MOVING NORTHEAST AT 25 MPH AND IT WILL THROUGH MADISON
COUNTY NORTH OF WINTERSET BY 630 PM.
 
ANOTHER SEVERE THUNDERSTORM WAS OVER SOUTHEAST GUTHRIE COUNTY 30 MILES
WEST OF DES MOINES OR 10 MILES SOUTHEAST REDFIELD.  THIS STORM WAS
MOVING NORTHEAST AT 25 MPH AND IT SHOULD MOVE THROUGH REDFIELD BY 630
MPH.  THIS STORM PRODUCED MARBLE SIZE HAIL AT STUART IN SOUTHEAST
GUTHRIE COUNTY.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
JOHNSON
 
&

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 29, 6:55 PM CSTSevere Thunderstorm WarningDMXMadison35 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm warning in 1993

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.