Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 9, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 14, 1994, 10:08 PM CDT for Black Hawk County, Iowa. It was in force for 52 min.
The area
The counties it named.
The facts
- Issued
- Apr 14, 1994, 10:08 PM CDT (03:08 UTC)
- Expired
- Apr 14, 1994, 11:00 PM CDT
- In force
- 52 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Black Hawk County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 3.1 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KALO 150309 SVRALO IAC013-150400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 1008 PM CDT THU APR 14 1994 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...BLACK HAWK COUNTY AT 1005 PM...WEATHER SERVICE RADAR IN WATERLOO WAS INDICATING SEVERE THUNDERSTORMS LOCATED 15 MILES SOUTH OF WATERLOO OR FROM 5 MILES SOUTH TO 5 MILES SOUTHEAST OF HUDSON. MOVEMENT WAS TO THE NORTHEAST AT 25 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF HUDSON...LA PORTE CITY...EVANSDALE...AND THE WATERLOO/CEDAR FALLS AREA. THESE STORMS HAVE A HISTORY OF PRODUCING LARGE HAIL...AND STRONG GUSTY WINDS. WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. DON'T USE ELECTRICAL APPLIANCES OR TELEPHONES EXCEPT IN AN EMERGENCY UNTIL THE SrTORM HAS PASSED. LINDENBERG
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, 9:39 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall | 36 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 | 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.