Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 64, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 6, 1994, 9:01 PM CDT for Boone County, Iowa. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jun 6, 1994, 9:01 PM CDT (02:01 UTC)
- Expired
- Jun 6, 1994, 9:41 PM CDT
- In force
- 40 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Boone County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.0 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
- 1216 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1808 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 65 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 070202 SVRDMX IAC015-070245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 901 PM CDT MON JUN 6 1994 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL IOWA ...SOUTHERN BOONE COUNTY AT 858 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHEAST OF BOONE OR ABOUT 35 MILES NORTHWEST OF DES MOINES. THE STORM WAS MOVING SOUTHEAST ABOUT 20 MILES AN HOUR. LUTHER AND MADRID ARE IN THE PATH OF THIS STORM. THE STORM WILL AFFECT LUTHER ABOUT 915 PM CDT AND MADRID ABOUT 930 PM CDT. 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. SO BE ON THE LOOKOUT. PLEASE REPORT INSTANCES OF SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. CHB
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 6, 6:44 PM CDT, 2 hours 17 minutes before
IAZALL-070040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 644 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF WESTERN AND NORTHWEST UNTIL 800 PM CDT THIS EVENING... ...A SEVERE THUNDRSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL...CENTRAL...AND SOUTH CENTRAL IOWA UNTIL MIDNIGHT... AT 630 PM...INTENSE THUNDERSTORMS WERE OVER PORTIONS OF NORTHWEST AND NORTH CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN A 20 MILE WIDE AREA CENTERED FROM 20 MILES SOUTH OF SPENCER...TO 15 MILES NORTH OF FORT DODGE...NEAR HUMBOLDT...TO 15 MILES WEST OF MASON CITY...NEAR GARNER. THESE STORMS ARE CABABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...FREQUENT LIGHTNING AND TORRENTIAL RAINFALL. THESE THUNDERSTORMS WERE PART OF A LARGER AREA OF SHOWERS AND THUNDERSTORMS LOCATED IN A 80 MILE WIDE BAND CENTERED FROM 20 MILES SOUTHEAST OF FORT DODGE TO THE MINNESOTA BORDER 25 MILES NORTH OF SPENCER. ALL PRECIPITATION WAS MOVING SOUTHEAST AT 25 MILES AN HOUR. PETERSEN
Special weather statement, Jun 6, 7:40 PM CDT, 1 hour 21 minutes before
IAZALL-070140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 740 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF WESTERN AND NORTHWEST UNTIL 800 PM CDT THIS EVENING... ...A SEVERE THUNDRSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL...CENTRAL...AND SOUTH CENTRAL IOWA UNTIL MIDNIGHT... AT 732 PM...INTENSE THUNDERSTORMS WERE OVER PORTIONS OF NORTHWEST AND NORTH CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN A 20 MILE WIDE AREA CENTERED FROM 20 MILES SOUTHWEST OF FORT DODGE...NEAR ROCKWELL CITY...THROUGH FORT DODGE...TO 25 MILES SOUTHWEST OF MASON CITY...NEAR BELMOND. THESE STORMS ARE CABABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...FREQUENT LIGHTNING AND FLOODING RAINFALL. THESE THUNDERSTORMS WERE PART OF A LARGER AREA OF SCATTERED SHOWERS AND THUNDERSTORMS LOCATED IN A 90 MILE WIDE AREA CENTERED FROM 10 MILES NORTH OF AMES TO 75 MILES NORTH OF SIOUX CITY...NEAR ROCK RAPIDS. ALL PRECIPITATION WAS MOVING SOUTHEAST AT 20 MILES AN HOUR. PETERSEN
Special weather statement, Jun 6, 8:28 PM CDT, 33 minutes before
IAZ006-007-008-016-017-018-026-027-028-038-070230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 828 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH CONTINUE FOR PORTIONS OF NORTH CENTRAL AND NORTHEAST IOWA UNTIL MIDNIGHT TONIGHT... AT 825 PM...SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUED ACROSS THOSE SECTIONS OF NORTH CENTRAL IOWA TO THE WEST OF HIGHWAY 63. THE MOST INTENSE OF THESE THUNDERSTORMS WILL MOVE THROUGH THE TOWNS OF CONRAD AND WHITMAN IN SOUTHWEST GRUNDY COUNTY AROUND 845 PM. THESE STORMS HAVE A HISTORY OF PRODUCING TORRENTIAL RAINS...SMALL HAIL...IN ADDITION TO 40 TO 50 MPH WIND GUSTS. THE PUBLIC SHOULD STAY TUNED TO NOAA WEATHER RADIO OR THEIR LOCAL COMMERCIAL TV AND RADIO STATIONS FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. TRS
Special weather statement, Jun 6, 8:28 PM CDT, 33 minutes before
IAZ006-007-008-016-017-018-026-027-028-038-070230- SPECIAL WEATHER STATEMENT...CORRECTION FOR HEADLINE... NATIONAL WEATHER SERVICE WATERLOO IA 828 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF NORTH CENTRAL AND NORTHEAST IOWA UNTIL MIDNIGHT TONIGHT... AT 825 PM...SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUED ACROSS THOSE SECTIONS OF NORTH CENTRAL IOWA TO THE WEST OF HIGHWAY 63. THE MOST INTENSE OF THESE THUNDERSTORMS WILL MOVE THROUGH THE TOWNS OF CONRAD AND WHITMAN IN SOUTHWEST GRUNDY COUNTY AROUND 845 PM. THESE STORMS HAVE A HISTORY OF PRODUCING TORRENTIAL RAINS...SMALL HAIL...IN ADDITION TO 40 TO 50 MPH WIND GUSTS. THE PUBLIC SHOULD STAY TUNED TO NOAA WEATHER RADIO OR THEIR LOCAL COMMERCIAL TV AND RADIO STATIONS FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. TRS
Special weather statement, Jun 6, 8:32 PM CDT, 29 minutes before
IAZ006-007-008-016-017-018-026-027-028-038-070230- SPECIAL WEATHER STATEMENT...CORRECTION FOR HEADLINE... NATIONAL WEATHER SERVICE WATERLOO IA 828 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF NORTH CENTRAL AND NORTHEAST IOWA UNTIL MIDNIGHT TONIGHT... AT 825 PM...SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUED ACROSS THOSE SECTIONS OF NORTH CENTRAL IOWA TO THE WEST OF HIGHWAY 63. THE MOST INTENSE OF THESE THUNDERSTORMS WILL MOVE THROUGH THE TOWNS OF CONRAD AND WHITMAN IN SOUTHWEST GRUNDY COUNTY AROUND 845 PM. THESE STORMS HAVE A HISTORY OF PRODUCING TORRENTIAL RAINS...SMALL HAIL...IN ADDITION TO 40 TO 50 MPH WIND GUSTS. THE PUBLIC SHOULD STAY TUNED TO NOAA WEATHER RADIO OR THEIR LOCAL COMMERCIAL TV AND RADIO STATIONS FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. TRS
Special weather statement, Jun 6, 8:43 PM CDT, 18 minutes before
IAZALL-070240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 843 PM CDT MON JUN 6 1994 ...A SEVERE THUNDRSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL...CENTRAL...AND SOUTH CENTRAL IOWA UNTIL MIDNIGHT... AT 832 PM...INTENSE THUNDERSTORMS WERE OVER PORTIONS OF NORTH CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN A 20 MILE WIDE AREA CENTERED FROM 45 MILES NORTHWEST OF DES MOINES...NEAR JEFFERSON TO 30 MILES WEST OF WATERLOO...NEAR ACKLEY. THESE STORMS ARE CABABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...FREQUENT LIGHTNING AND FLOODING RAINFALL. THESE THUNDERSTORMS WERE PART OF A LARGER AREA OF SCATTERED SHOWERS AND THUNDERSTORMS LOCATED IN A 90 MILE WIDE AREA CENTERED FROM MARSHALLTOWN NORTHWEST TO SIOUX FALLS SOUTH DAKOTA. ALL PRECIPITATION WAS MOVING SOUTHEAST AT 20 MILES AN HOUR. PETERSEN
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, 9:17 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 |
| 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.