Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 182, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 21, 1994, 3:49 PM CDT for Butler County, Iowa. It was in force for 22 min.
The area
The counties it named.
The facts
- Issued
- Sep 21, 1994, 3:49 PM CDT (20:49 UTC)
- Expired
- Sep 21, 1994, 4:11 PM CDT
- In force
- 22 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Butler County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 8.8 hours before the alert went out and 244 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
- 49 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 834 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 93 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 212050 RRA SVRALO IAC023-212130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 349 PM CDT WED SEP 21 1994 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL IOWA ...SOUTHERN BUTLER COUNTY AT 345 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WATERLOO INDICATED A SEVERE THUNDERSTORM 15 MILES WEST OF WATERLOO NEAR THE TOWN OF PARKERSBURG. MOVEMENT WAS TO THE EAST AT 20 MPH AND WILL AFFECT THE TOWNS OF PARKERSBURG AND NEW HARTFORD. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A REINFORCED BUILDING. STAY INSIDE AWAY FROM WINhDOWS UNTIL THE STORM HAS PASSED. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. COGIL
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, Sep 21, 2:52 PM CDT, 57 minutes before
IAZ036-037-212100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 252 PM CDT WED SEP 21 1994 ...STRONG STORMS WERE DEVELOPING IN CENTRAL IOWA... AT 250 PM CDT NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM JUST EAST OF WEBSTER CITY OR ABOUT 60 MILES NORTH OF DES MOINES. THIS STORM HAS THE POTENTIAL TO PRODUCE HALF-INCH DIAMETER HAIL AS IT MOVES EAST AT 25 MILES AN HOUR. THESE STORMS WERE LOCATED IN EASTERN HAMILTON COUNTY. BRIEF HEAVY RAIN WILL ACCOMPANY THIS STORM. PERSONS IN THE PATH OF THIS STORM SHOULD SEEK SHELTER.
Special weather statement, Sep 21, 2:53 PM CDT, 56 minutes before
IAZ036-037-212100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 252 PM CDT WED SEP 21 1994 ...STRONG STORMS WERE DEVELOPING IN CENTRAL IOWA... AT 250 PM CDT NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM JUST EAST OF WEBSTER CITY OR ABOUT 60 MILES NORTH OF DES MOINES. THIS STORM HAS THE POTENTIAL TO PRODUCE HALF-INCH DIAMETER HAIL AS IT MOVES EAST AT 25 MILES AN HOUR. THESE STORMS WERE LOCATED IN EASTERN HAMILTON COUNTY. BRIEF HEAVY RAIN WILL ACCOMPANY THIS STORM. PERSONS IN THE PATH OF THIS STORM SHOULD SEEK SHELTER.
Special weather statement, Sep 21, 3:21 PM CDT, 28 minutes before
IAZ006>011-016>019-026>029-038>040-212125- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 321 PM CDT WED SEP 21 1994 ...STRONG THUNDERSTORMS CONTINUE TO DEVELOP ACROSS NORTHEAST IOWA... AT 315 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WATERLOO SHOWED AN AREA OF SHOWERS AND STRONG THUNDERSTORMS WITH THE LEADING EDGE FROM NEW HAMPTON SOUTHWESTWARD TO PARKERSBURG THEN WESTWARD TO JEWELL. THE STRONGEST STORMS WERE LOCATED 10 MILES WEST OF PARKERSBURG. THESE STORMS WERE MOVING TO THE EAST AT 25 MPH AND WILL AFFECT THE COMMUNITIES OF NEW HAMPTON...PARKERSBURG AND ACKLEY IN THE NEXT HOUR. PERSONS IN THESE AREAS AND SURROUNDING COMMUNITIES CAN EXPECT VERY HEAVY RAIN...DEADLY LIGHTNING...GUSTY THUNDERSTORM WINDS...AND POSSIBLE SMALL HAIL REMEMBER...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THESE AFFECTED AREAS AND PERSONS SHOULD BE PREPARED TO TAKE COVER SHOULD THESE STORMS BECOME SEVERE. COGIL
Special weather statement, Sep 21, 3:22 PM CDT, 27 minutes before
IAZ006>011-016>019-026>029-038>040-212125- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 321 PM CDT WED SEP 21 1994 ...STRONG THUNDERSTORMS CONTINUE TO DEVELOP ACROSS NORTHEAST IOWA... AT 315 PM CDT...NATIONAL WEATHER SERVICE RADAR IN WATERLOO SHOWED AN AREA OF SHOWERS AND STRONG THUNDERSTORMS WITH THE LEADING EDGE FROM NEW HAMPTON SOUTHWESTWARD TO PARKERSBURG THEN WESTWARD TO JEWELL. THE STRONGEST STORMS WERE LOCATED 10 MILES WEST OF PARKERSBURG. THESE STORMS WERE MOVING TO THE EAST AT 25 MPH AND WILL AFFECT THE COMMUNITIES OF NEW HAMPTON...PARKERSBURG AND ACKLEY IN THE NEXT HOUR. PERSONS IN THESE AREAS AND SURROUNDING COMMUNITIES CAN EXPECT VERY HEAVY RAIN...DEADLY6 LIGHTNING...GUSTY THUNDERSTORM WINDS...AND POSSIBLE SMALL HAIL REMEMBER...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THESE AFFECTED AREAS AND PERSONS SHOULD BE PREPARED TO TAKE COVER SHOULD THESE STORMS BECOME SEVERE. COGIL
Special weather statement, Sep 21, 3:40 PM CDT, 9 minutes before
IAZALL-212140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 340 PM CDT WED SEP 21 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF IOWA UNTIL 900 PM CDT... AT 330 CDT...NUMEROUS SHOWERS AND STRONG THUNDERSTORMS WERE OVER THE NORTHWEST HALF OF IOWA...NORTHWEST OF A LINE FROM SHENANDOAH THROUGH DES MOINES TO DECORAH. THE STRONGEST STORMS IN THIS AREA WERE BETWEEN AMES AND MARSHALLTOWN...NEAR ESTHERVILLE AND BETWEEN COUCIL BLUFFS AND ATLANTIC. THESE STORMS ARE CAPABLE OF PRODUCING HAIL UP TO 3/4 INCH IN DIAMETER...GUSTY WINDS TO 40 MPH AND BRIEF HEAVY RAINFALL. MOVEMENT OF THE SHOWERS AND THUNDERSTORMS WAS EAST AT 25 MPH. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL TV AND RADIO STATIONS FOR UPDATES ON THIS DEVELOPING WEATHER SITUATION. / PETERSEN
Special weather statement, Sep 21, 3:41 PM CDT, 8 minutes before
IAZALL-212140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 340 PM CDT WED SEP 21 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF IOWA UNTIL 900 PM CDT... AT 330 CDT...NUMEROUS SHOWERS AND STRONG THUNDERSTORMS WERE OVER THE NORTHWEST HALF OF IOWA...NORTHWEST OF A LINE FROM SHENANDOAH THROUGH DES MOINES TO DECORAH. THE STRONGEST STORMS IN THIS AREA WERE BETWEEN AMES AND MARSHALLTOWN...NEAR ESTHERVILLE AND BETWEEN COUCIL BLUFFS AND ATLANTIC. THESE STORMS ARE CAPABLE OF PRODUCING HAIL UP TO 3/4 INCH IN DIAMETER...GUSTY WINDS TO 40 MPH AND BRIEF HEAVY RAINFALL. MOVEMENT OF THE SHOWERS AND THUNDERSTORMS WAS EAST AT 25 MPH. STAY TUNED TPO NOAA WEATHER RADIO OR LOCAL TV AND RADIO STATIONS FOR UPDATES ON THIS DEVELOPING WEATHER SITUATION. / PETERSEN
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 3:14 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 31 min |
| Sep 21, 3:19 PM CDT | Severe Thunderstorm Warning | DMX | Story | 26 min |
| Sep 21, 3:49 PM CDT | Severe Thunderstorm Warning | DMX | Clay | 41 min |
| Sep 21, 3:54 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 41 min |
| Sep 21, 4:07 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 38 min |
| Sep 21, 4:20 PM CDT | Severe Thunderstorm Warning | DMX | Audubon | 40 min |
| Sep 21, 4:59 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 31 min |
| Sep 21, 6:00 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 20 min |
| Sep 21, 6:00 PM CDT | Severe Thunderstorm Warning | DMX | Story | 45 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.