Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 4, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 14, 1994, 9:39 PM CDT for Jasper County, Marshall County, Iowa. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Apr 14, 1994, 9:39 PM CDT (02:39 UTC)
- Expired
- Apr 14, 1994, 10:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Jasper County, IA, Marshall County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.7 hours before the alert went out and 284 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.
- Mixed-layer CAPE
- 715 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1765 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 150240 SVRDSM IAC099-127-150315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 939 PM CDT THU APR 14 1994 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONSS... IN CENTRAL IOWA ...JASPER COUNTY...EASTERN MARSHALL COUNTY AT 935 PM...SEVERE THUNDERSTORMS WERE LOCATED IN MARSHALL AND JASPER COUNTIES. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A HIGH LIKELIHOOD OF LARGE HAIL WITH THESE STORMS. BETWEEN 935 AND 10 PM...THESE STORMS WILL MOVE CLOSE TO THE COMMUNITIES OF NEWTON AND MARSHALLTOWN. MOVEMENT WAS NORTHEAST AT 35 MPH. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITONS. FELDT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 8:29 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 31 min |
| Apr 14, 8:34 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 41 min |
| Apr 14, 9:04 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass | 41 min |
| Apr 14, 9:40 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 35 min |
| Apr 14, 9:44 PM CDT | Severe Thunderstorm Warning | DMX | Madison, Union | 31 min |
| Apr 14, 9:47 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 43 min |
| Apr 14, 9:55 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 35 min |
| Apr 14, 10:08 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 52 min |
| Apr 14, 10:08 PM CDT | Tornado Warning | DMX | Adair | 37 min |
| Apr 14, 10:24 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 51 min |
| Apr 14, 10:26 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 34 min |
| Apr 14, 10:27 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 48 min |
| Apr 14, 10:55 PM CDT | Severe Thunderstorm Warning | DMX | Story | 35 min |
| Apr 14, 11:03 PM CDT | Tornado Warning | DMX | Story | 27 min |
| Apr 14, 11:04 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 26 min |
| Apr 14, 11:23 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 19 min |
| Apr 14, 11:39 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 25 min |
| Apr 14, 11:47 PM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 28 min |
| Apr 15, 12:09 AM CDT | Severe Thunderstorm Warning | DMX | Linn | 36 min |
| Apr 15, 12:10 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 21 min |
| Apr 15, 12:15 AM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 29 min |
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.