Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 166, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 17, 1994, 8:22 PM CDT for Howard County, Iowa. It was in force for 53 min.
The area
The counties it named.
The facts
- Issued
- Aug 17, 1994, 8:22 PM CDT (01:22 UTC)
- Expired
- Aug 17, 1994, 9:15 PM CDT
- In force
- 53 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Howard County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 1.4 hours before the alert went out and 195 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
- 1975 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 42 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 180123 RRA SVRALO IAC089-180215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 822 PM CDT WED AUG 17 1994 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 915 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...HOWARD COUNTY AT 820 PM...WEATHER SERVICE RADAR IN WATERLOO WAS INDICATING A SEVERE THUNDERSTORM LOCATED 20 MILES SOUTHWEST OF DECORAH IN THE MIDDLE OF HOWARD COUNTY. THIS STORM WAS MOVING TO THE EAST AT 15 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF ELMA...LOURDES...AND CRESCO. THIS STORM HAS HAD THE HISTORY OF PRODUCING LARGE HAIL AND STRONG WINDS...ALONG WITH FUNNEL CLOUDS. 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 STORM HAS PASSED. LINDENBERG &
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 17, 6:06 PM CDT, 2 hours 16 minutes before
IAZ006>011-016>019-180010- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 607 PM CDT WED AUG 17 1994 ...STRONG THUNDERSTORMS HAD DEVELOPED IN NORTHEAST IOWA... AT 6PM...WEATHER SERVICE RADAR IN WATERLOO WAS SHOWING STRONG THUNDERSTORMS THAT HAD RAPIDLY DEVELOPED IN NORTHEAST IOWA. THESE STORMS WERE LOCATED 20 MILES EAST OF MASON CITY OR JUST EAST OF NORA SPRINGS. THESE STORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF ORCHARD...AND OSAGE BY 645PM. PERSONS IN THESE AREAS CAN EXPECT BRIEF HEAVY DOWNPOURS OF RAIN ALONG WITH FREQUENT LIGHTNING...STRONG WINDS AND SMALL HAIL. STAY TUNED TO YOUR LOCAL TV...RADIO OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS. LINDENBERG
Special weather statement, Aug 17, 6:07 PM CDT, 2 hours 15 minutes before
IAZ006>011-016>019-180010- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 607 PM CDT WED AUG 17 1994 ...STRONG THUNDERSTORMS HAD DEVELOPED IN NORTHEAST IOWA... AT 6PM...WEATHER SERVICE RADAR IN WATERLOO WAS SHOWING STRONG THUNDERSTORMS THAT HAD RAPIDLY DEVELOPED IN NORTHEAST IOWA. THESE STORMS WERE LOCATED 20 MILES EAST OF MASON CITY OR JUST EAST OF NORA SPRINGS. THESE STORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF ORCHARD...AND OSAGE BY 645PM. PERSONS IN THESE AREAS CAN EXPECT BRIEF HEAVY DOWNPOURS OF RAIN ALONG WITH FREQUENT LIGHTNING...STRONG WINDS AND SMALL HAIL. STAY TUNED TO YOUR LOCAL TV...RADIO OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS. LINDENBERG
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 7:05 PM CDT | Tornado Warning | DMX | Howard | 55 min |
| Aug 17, 9:52 PM CDT | Severe Thunderstorm Warning | DMX | Howard, Winneshiek | 38 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.