Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 129, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 7, 1994, 11:51 PM CDT for Monona County, Iowa. It was in force for 24 min.
The area
The counties it named.
The facts
- Issued
- Aug 7, 1994, 11:51 PM CDT (04:51 UTC)
- Expired
- Aug 8, 1994, 12:15 AM CDT
- In force
- 24 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Monona County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.9 hours before the alert went out and 88 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
- 4693 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 892 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSUX 080451 RRA SVRSUX IAC133-080515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA 1151 PM CDT SUN AUG 7 1994 THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL IOWA ...EASTERN MONONA COUNTY AT 1149 PM CDT A SEVERE THUNDERSTORM WAS LOCATED AT DANBURY IOWA OR 40 MILES SOUTHEAST OF SIOUX CITY. MOVEMENT OF THE STORM WAS SOUTH AT 25 MILES AN HOUR. DANBURY SPOTTERS REPORTED WIND OF 60 TO 65 MILES AN HOUR WITH THIS STORM. THE STORM WILL AFFECT MAPLETON...CASTANA...AND UTE IOWA BETWEEN 1150 PM AND 1215 AM CDT. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN QUICKLY FLOOD LOW LYING AREAS. IF YOU ARE IN THE PATH OF THIS STORM TAKE SHELTER IN A REINFORCED BUILDING IMMEDIATELY. MICHELS &
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 7, 9:16 PM CDT, 2 hours 35 minutes before
SDZ062-065>070-MNZ097-098-080200- SPECIAL WEATHER STATEMENT...CORRECTED FOR LAST LINE. NATIONAL WEATHER SERVICE SIOUX FALLS SD 900 PM CDT SUN AUG 7 1994 ...SEVERE THUNDERSTORM WATCH 704 CANCELED... SEVERE THUNDERSTORM WATCH 704 HAS BEEN CANCELED FOR THE REMAINDER OF SOUTHEAST SOUTH DAKOTA AND EXTREME SOUTHWEST MINNESOTA. KOSCIELSKI
Local storm report, Aug 7, 10:45 PM CDT, 1 hour 6 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1045 PM CDT SUN AUG 7 1994
STORM DATA FOR SUNDAY AUGUST 7 1994
TIME CDT COUNTY...LOCATION AND STATE CHARACTER OF STORM...DAMAGE
.......................................................................
653 PM HUTCHINSON...DIMOCK SD TORNADO 6 MILES EAST OF
DOMICK MN
728 PM MURRAY...FULDA MN GOLFBALL SIZE HAIL
715 PM HUTCHINSON...FREEMAN 5N 8W SD GOLFBALL SIZE HAIL
745 PM MURRAY...FULDA 4S MN TORNADO AND 3/4 INCH HAIL
740 PM NOBLES...KINBRAE MN LARGE TORNADO NEAR KINBRAE
. DAMAGE UNKNOWN
900 PM NOBLES...ELLSWORTH MN NUMEROUS FUNNEL REPORTS
DMSpecial weather statement, Aug 7, 11:13 PM CDT, 38 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-080515- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1113 PM CDT SUN AUG 7 1994 ...STRONG THUNDERSTORMS WERE PASSING THROUGH THE AREA... AT 1113 PM CDT STRONG THUNDERSTORMS WERE LOCATED IN THE SIOUX CITY AREA AND NEAR LE MARS IOWA. MOVEMENT OF THE STORMS WAS SOUTH AT 20 MILES AN HOUR. PEA SIZED HAIL WAS REPORTED BY DAKOTA COUNTY SHERIFF'S OFFICE AT 1110 PM IN SOUTH SIOUX CITY. THE STRONGER THUNDERSTORMS WILL HAVE PEA TO MARBLE SIZED HAIL. PEOPLE IN THESE AREAS SHOULD CONTINUE TO LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 5 AM CDT FOR CHEROKEE...WOODBURY...IDA...MONONA COUNTIES IN IOWA AND THURSTON AND DAKOTA COUNTIES IN NEBRASKA. THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT UNTIL MIDNIGHT FOR OBRIEN COUNTY HAS BEEN CANCELLED. MICHELS &
Special weather statement, Aug 7, 11:19 PM CDT, 32 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-080515- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1113 PM CDT SUN AUG 7 1994 ...STRONG THUNDERSTORMS WERE PASSING THROUGH THE AREA... AT 1113 PM CDT STRONG THUNDERSTORMS WERE LOCATED IN THE SIOUX CITY AREA AND NEAR LE MARS IOWA. MOVEMENT OF THE STORMS WAS SOUTH AT 20 MILES AN HOUR. PEA SIZED HAIL WAS REPORTED BY DAKOTA COUNTY SHERIFF'S OFFICE AT 1110 PM IN SOUTH SIOUX CITY. THE STRONGER THUNDERSTORMS WILL HAVE PEA TO MARBLE SIZED HAIL. PEOPLE IN THESE AREAS SHOULD CONTINUE TO LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 5 AM CDT FOR CHEROKEE...WOODBURY...IDA..\.MONONA COUNTIES IN IOWA AND THURSTON AND DAKOTA COUNTIES IN NEBRASKA. THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT UNTIL MIDNIGHT FOR OBRIEN COUNTY HAS BEEN CANCELLED. MICHELS &
Special weather statement, Aug 7, 11:38 PM CDT, 13 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-080545- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1138 PM CDT SUN AUG 7 1994 ...A STRONG THUNDERSTORM WAS SOUTHEAST AND NORTH OF SIOUX CITY... AT 1137 PM CDT STRONG THUNDERSTORMS WERE LOCATED BETWEEN LE MARS AND HINTON IOWA OR 20 MILES NORTHEAST OF SIOUX CITY. A STRONG THUNDERSTORM WAS ALSO IN THE CLIMBING HILL AREA WHICH IS 20 MILES SOUTHEAST OF SIOUX CITY. 45 TO 50 MPH WIND WAS REPORTED BY WOODBURY EOC AT CLIMBING HILL AT 1133 PM. MOVEMENT OF THE STORMS WERE SOUTH AT 25 MILES AN HOUR. PEOPLE IN THE MOVILLE AND CLIMBING HILL AND HORNICK IOWA AREAS SHOULD BE PREPARED FOR PEA TO MARBLE SIZE HAIL AND GUSTY WIND TO 50 MILES AN HOUR. THESE STORMS WILL AFFECT THESE AREAS BETWEEN 1140 PM AND 1215 AM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 5 AM CDT FOR DAKOTA AND THURSTON COUNTIES IN NEBRASKA...CHEROKEE...WOODBURY...IDA...AND MONONA COUNTIES IN IOWA. MICHELS &
Special weather statement, Aug 7, 11:44 PM CDT, 7 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-080545- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1138 PM CDT SUN AUG 7 1994 ...A STRONG THUNDERSTORM WAS SOUTHEAST AND NORTH OF SIOUX CITY... AT 1137 PM CDT STRONG THUNDERSTORMS WERE LOCATED BETWEEN LE MARS AND HINTON IOWA OR 20 MILES NORTHEAST OF SIOUX CITY. A STRONG THUNDERSTORM WAS ALSO IN THE CLIMBING HILL AREA WHICH IS 20 MILES SOUTHEAST OF SIOUX CITY. 45 TO 50 MPH WIND WAS REPORTED BY WOODBURY EOC AT CLIMBING HILL AT 1133 PM. MOVEMENT OF THE STORMS WERE SOUTH AT 25 MILES AN HOUR. PEOPLE IN THE MOVILLE AND CLIMBING HILL AND HORNICK IOWA AREAS SHOULD BE PREPARED FOR PEA TO MARBLE SIZE HAIL AND GUSTY WIND TO 50 MILES AN HOUR. THESE STORMS WILL AFFECT THESE AREAS BETWEEN 1140 PM AND 1215 AM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 5 AM CDT FOR DAKOTA AND THURSTON COUNTIES IN NEBRASKA...CHEROKEE...WOODBURY...IDA...AND MONONA COUNTIES IN IOWA. MICHELS &
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:49 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 56 min |
| Aug 7, 9:14 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 46 min |
| Aug 7, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 56 min |
| Aug 7, 10:01 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 29 min |
| Aug 7, 10:20 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 40 min |
| Aug 8, 12:17 AM CDT | Tornado Warning | FSD | Monona | 28 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.