Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 73, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 7, 1994, 6:43 PM CDT for Boone County, Iowa. It was in force for 47 min.
The area
The counties it named.
The facts
- Issued
- Jun 7, 1994, 6:43 PM CDT (23:43 UTC)
- Expired
- Jun 7, 1994, 7:30 PM CDT
- In force
- 47 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Boone County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.7 hours before the alert went out and 218 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
- 873 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 1007 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KDSM 072344 SVRDMX IAC015-080030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 643 PM CDT TUE JUN 7 1994 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL IOWA ...BOONE COUNTY. AT 645 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES NORTHWEST OF DES MOINES OR JUST WEST OF OGDEN. THIS STORM WAS MOVING EAST AT 20 MILES AN HOUR. THE STORM WILL AFFECT OGDEN...BEAVER...AND LEDGES STATE PARK BY 710 PM CDT. THIS STORM HAS PRODUCED WINDS UP TO 60 MILES PER HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. JUNGBLUTH AND ANDERSON
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, Jun 7, 5:22 PM CDT, 1 hour 21 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-072330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 522 PM CDT TUE JUN 7 1994 ...THUNDERSTORMS WERE SPREADING INTO THE WATERLOO AREA... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR BLACK HAWK AND GRUNDY COUNTY COUNTIES UNTIL 10 PM CDT...OR MAINLY SOUTH OF HIGHWAY 3 AND WEST OF HIGHWAY 150. AT 520 PM SHOWERS AND THUNDERSTORMS WERE LOCATED JUST 5 MILES SOUTHWEST TO SOUTHEAST OF THE WATERLOO AREA. THESE WERE SPREADING TO THE NORTHEAST AT 30 MPH AND WILL AFFECT WATERLOO/CEDAR FALLS...DUNKERTON AND EVANSDALE AREAS THROUGH 6 PM. THESE STORMS WERE NOT PRODUCING SEVERE WEATHER...HOWEVER BRIEF HEAVY RAINS AND LIGHTNING WILL OCCUR WITH THESE STORMS AS THEY MOVE THROUGH. COLLAR
Special weather statement, Jun 7, 5:23 PM CDT, 1 hour 20 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-072330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 522 PM CDT TUE JUN 7 1994 ...THUNDERSTORMS WERE SPREADING INTO THE WATERLOO AREA... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR BLACK HAWK AND GRUNDY COUNTY COUNTIES UNTIL 10 PM CDT...OR MAINLY SOUTH OF HIGHWAY 3 AND WEST OF HIGHWAY 150. AT 520 PM SHOWERS AND THUNDERSTORMS WERE LOCATED JUST 5 MILES SOUTHWEST TO SOUTHEAST OF THE WATERLOO AREA. THESE WERE SPREADING TO THE NORTHEAST AT 30 MPH AND WILL AFFECT WATERLOO/CEDAR FALLS...DUNKERTON AND EVANSDALE AREAS THROUGH 6 PM. THESE STORMS WERE NOT PRODUCING SEVERE WEATHER...HOWEVER BRIEF HEAV Y RAINS AND LIGHTNING WILL OCCUR WITH THESE STORMS AS THEY MOVE THROUGH. COLLAR
Special weather statement, Jun 7, 5:40 PM CDT, 1 hour 3 minutes before
IAZALL-072340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 540 PM CDT TUE JUN 7 1994 A SEVERE THUNDERSTORM WATCH IS INEFFECT FOR MUCH OF IOWA UNTIL 10 PM... ...A FLASH FLOOD WATCH IS IN EFFECT OVER SOUTHWEST IOWA FOR THE REST OF THIS AFTERNOON AND TONIGHT... AT 530 PM...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED IN EAST CENTRAL IOWA NEAR CEDAR RAPIDS...AND IN WEST CENTRAL IOWA NEAR CEDAR RAPIDS. VERY HEAVY RAINS...WINDS IN EXCESS OF FIFTY MILES AN HOUR AND HAIL CAN BE EXPECED WITH THE PASSAGE OF THESE STORMS. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 25 MILES AN HORL. SCOTT
Special weather statement, Jun 7, 6:29 PM CDT, 14 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-080030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 629 PM CDT TUE JUN 7 1994 ...SHOWERS WERE SCATTERED WHILE SEVERE WEATHER WAS ABSENT... A SEVERE THUNDERSTORM WATCH DOES REMAIN IN EFFECT UNTIL 10 PM CDT FOR BLACK HAWK AND GRUNDY COUNTIES. AT 625 PM SHOWERS WERE LOCATED MAINLY ALONG AND SOUTH OF HIGHWAY 3. OTHER SHOWERS WERE SCATTERED BETWEEN HIGHWAYS 9 AND 18. THROUGH 730 PM NORTHEAST IOWA CAN EXPECT SCATTERED SHOWERS WITH CLOUDY SKIES. THE STRONGEST THUNDERSTORMS WILL REMAIN IN CENTRAL IOWA AFFECTING LOCATIONS FROM AMES TO MARSHALLTOWN AND POINTS SOUTH. THOSE LIVING IN BLACK HAWK AND GRUNDY COUNTIES SHOULD REMAIN ALERT AS THAT SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM. COLLAR
Special weather statement, Jun 7, 6:30 PM CDT, 13 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-080030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 629 PM CDT TUE JUN 7 1994 ...SHOWERS WERE SCATTERED WHILE SEVERE WEATHER WAS ABSENT... A SEVERE THUNDERSTORM WATCH DOES REMAIN IN EFFECT UNTIL 10 PM CDT FOR BLACK HAWK AND GRUNDY COUNTIES. AT 625 PM SHOWERS WERE LOCATED MAINLY ALONG AND SOUTH OF HIGHWAY 3. OTHER SHOWERS WERE SCATTERED BETWEEN HIGHWAYS 9 AND 18. THROUGH 730 PM NORTHEAST IOWA CAN EXPECT SCATTERED SHOWERS WITH CLOUDY SKIES. THE STRONGEST THUNDERSTORMS WILL REMAIN IN CENTRAL IOWA AFFECTING LOCATIONS FROM AMES TO MARSHALLTOWN AND POINTS SOUTH. THOSE LIVING IN BLACK HAWK AND GRUNDY COUNTIES SHOULD REMAIN ALERT AS THAT SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM. COLLAR
Special weather statement, Jun 7, 6:40 PM CDT, 3 minutes before
IAZALL-080040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 640 PM CDT TUE JUN 7 1994 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF IOWA UNTIL 10 PM... A FLASH FLOOD WATCH IS IN EFFECT OVER SOUTHWEST IOWA FOR THE REST OF THIS AFTERNOON AND TONIGHT... AT 630 PM...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED IN EAST CENTRAL IOWA NEAR CEDAR RAPIDS...AND IN CENTRAL IOWA NEAR JEFFERSON...WEBSTER CITY...AND JEWELL. VERY HEAVY RAINS...WINDS IN EXCESS OF FIFTY MILES AN HOUR AND HAIL CAN BE EXPECED WITH THE PASSAGE OF THESE STORMS. THESE STORMS WERE PART OF A LARGER AREA OF THUNDERSTORMS EXTENDING ALONG AND MOSTLY SOUTH OF A LINE FROM CHEROKEE AND WATERLOO. IN EAST CENTRAL IOWA...THE STORMS WERE IN AN AREA ABOUT 75 MILES IN DIAMETER WITH ITS CENTER NEAR IOWA CITY. THIS INCLUDED CEDAR RAPIDS...DUBUQUE AND THE QUD CITIES AREA. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 35 MILES AN HORL. SCOTT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 7:39 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 29 min |
| Jun 6, 7:52 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 38 min |
| Jun 6, 8:02 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 43 min |
| Jun 6, 8:25 PM CDT | Tornado Warning | DMX | Boone | 50 min |
| Jun 6, 8:32 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 43 min |
| Jun 6, 9:01 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 40 min |
| Jun 6, 9:17 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 30 min |
| Jun 6, 9:25 PM CDT | Severe Thunderstorm Warning | DMX | Polk, Story | 31 min |
| Jun 7, 4:02 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 28 min |
| Jun 7, 4:19 PM CDT | Tornado Warning | DMX | Benton | 26 min |
| Jun 7, 4:41 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 49 min |
| Jun 7, 4:52 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 15 min |
| Jun 7, 5:20 PM CDT | Severe Thunderstorm Warning | DMX | Johnson | 30 min |
| Jun 7, 5:57 PM CDT | Severe Thunderstorm Warning | DMX | Johnson | 33 min |
| Jun 7, 6:16 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 44 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.