Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 71, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 7, 1994, 5:57 PM CDT for Johnson County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Jun 7, 1994, 5:57 PM CDT (22:57 UTC)
- Expired
- Jun 7, 1994, 6:30 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Johnson County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 11.0 hours before the alert went out and 389 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
- 725 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KDSM 072256 SVRDMX IAC103-072330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 557 PM CDT TUE JUN 7 1994 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL IOWA ...EASTERN JOHNSON COUNTY AT 555 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NORTH OF IOWA CITY IN EAST CENTRAL IOWA. THE STORM WILL BE AFFECTING THE CITIES OF NORTH LIBERTY AND SOLON. THE STORM WAS MOVING EAST AT ABOUT 15 MILES AN HOUR. 3/4 INCH AND LARGER HAIL HAD BEEN REPORTED IN THE NORTH LIBERTY AREA AT 553 PM. 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. JM &
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, 4:40 PM CDT, 1 hour 17 minutes before
IAZALL-072240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 440 PM CDT TUE JUN 7 1994 ...A FLASH FLOOD WATCH IS IN EFFECT OVER SOUTHWEST IOWA FOR THE REST OF THIS AFTERNOON AND TONIGHT... AT 430 PM...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAINS AND SMALL HAIL WAS LOCATED IN EAST CENTRAL IOWA JUST NORTHWEST OF CEDAR RAPIDS. OTHER THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED IN WEST CENTRAL AND NORTHWEST IOWA IN AN AREA AOUT 20 MILES WIDE AND EXTENDING FROM JUST SOUTH OF SIOUX CITY TO JUST WEST OF BOONE. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 25 MILES AN HORL. SCOTT : <.g9"].>FN ne~r fATBY6y">,RD~jD:>vBrzjo
Local storm report, Jun 7, 5:17 PM CDT, 40 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
520 PM CDT TUE JUN 7 1994
...ALL TIMES CDT...
TIME EVENT LOCATION -CITY AND COUNTY
505 PM 1 INCH DIAMETER HAIL FAIRFAX IN BENTON CO.
510 PM 1.5 INCH DIMATER HAIL LAWFORD IN BENTON CO.
515 PM 0.75 INCH DIAMETER HAIL 4 WEST OF SWISHER IN
JOHNSON COUNTY.
ANDERSONLocal storm report, Jun 7, 5:20 PM CDT, 37 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
520 PM CDT TUE JUN 7 1994
...ALL TIMES CDT...
TIME EVENT LOCATION -CITY AND COUNTY
505 PM 1 INCH DIAMETER HAIL FAIRFAX IN BENTON CO.
510 PM 1.5 INCH DIMATER HAIL LAWFORD IN BENTON CO.
515 PM 0.75 INCH DIAMETER HAIL 4 WEST OF SWISHER IN
JOHNSON COUNTY.
ANDERSON
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0V6WWUSSpecial weather statement, Jun 7, 5:22 PM CDT, 35 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, 34 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, 17 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
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, 6:16 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 44 min |
| Jun 7, 6:43 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 47 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.