Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 37, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 12, 1994, 5:39 AM CDT for Monona County, Iowa. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1994, 5:39 AM CDT (10:39 UTC)
- Expired
- Jun 12, 1994, 6:05 AM CDT
- In force
- 26 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, 10.7 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2204 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 71 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 KSUX 121040 RRA SVRSUX IAC133-121115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA 539 AM CDT SUN JUN 12 1994 THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL IOWA ...EASTERN MONONA COUNTY AT 538 CDT A SEVERE THUNDERSTORM WAS AT UTE IOWA...50 MILES SOUTHEAST OF SIOUX CITY. MOVEMENT WAS EAST AT 20 MILES AN HOUR. THE STORM WILL PASS THROUGH UTE AND OUT OF MONONA COUNTY IOWA BY 6 AM CDT. AT 536 CDT A STORM SPOTTER IN UTE REPORTED 3/4 INCH HAIL WITH SOME LARGER HAIL STONES. 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. SQI &
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 12, 4:41 AM CDT, 58 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-121045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 441 AM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WILL MOVE THROUGH LAWTON IOWA... AT 440 AM CDT A STRONG THUNDERSTORM WAS NEAR LAWTON IOWA...10 MILES EAST OF SIOUX CITY. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR AND AT THIS RATE THE STORM WILL IMMEDIATELY MOVE THROUGH LAWTON AND THEN JUST SOUTH OF MOVILLE BY 515 AM. PEA SIZED HAIL...HEAVY RAIN AND FREQUENT LIGHTNING WILL OCCUR WITH THIS STORM. OTHER THUNDERSTORMS EXTENDED FROM CONCORD AND HUBBARD NEBRASKA TO KINGSLEY IOWA. THESE STORMS ARE ALSO CAPABLE OF BRIEF HEAVY RAIN AND SOME SMALL HAIL. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR DIXON...DAKOTA AND THURSTON COUNTIES IN NEBRASKA UNTIL 11 AM CDT. SQI
Special weather statement, Jun 12, 4:43 AM CDT, 56 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-121045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 441 AM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WILL MOVE THROUGH LAWTON IOWA... AT 440 AM CDT A STRONG THUNDERSTORM WAS NEAR LAWTON IOWA...10 MILES EAST OF SIOUX CITY. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR AND AT THIS RATE THE STORM WILL IMMEDIATELY MOVE THROUGH LAWTON AND THEN JUST SOUTH OF MOVILLE BY 515 AM. PEA SIZED HAIL...HEAVY RAIN AND FREQUENT LIGHTNING WILL OCCUR WITH THIS STORM. OTHER THUNDERSTORMS EXTENDED FROM CONCORD AND HUBBARD NEBRASKA TO KINGSLEY IOWA. THESE STORMS ARE ALSO CAPABLE OF BRIEF HEAVY RAIN AND SOME SMALL HAIL. A SEVERE THUNDERST.ORM WATCH IS IN EFFECT FOR DIXON...DAKOTA AND THURSTON COUNTIES IN NEBRASKA UNTIL 11 AM CDT. SQI
Special weather statement, Jun 12, 5:05 AM CDT, 34 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-121110- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 505 AM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WILL MOVE THROUGH MONONA COUNTY IOWA... AT 502 AM CDT A VERY STRONG THUNDERSTORM WAS BETWEEN CASTANA AND SOLDIER IOWA...40 TO 50 MILES SOUTH EAST OF SIOUX CITY. THIS STORM WILL PRODUCE PEA TO MARBLE SIZE HAIL...FREQUENT LIGHTNING AND BRIEF HEAVY RAIN AS IT MOVES THROUGH SOLDIER IOWA BY AROUND 530 AM CDT. OTHER THUNDERSTORM CONTINUED IN A LINE FROM JUST SOUTH OF SIOUX CITY TO NEAR SOLDIER IOWA. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA UNTIL 11 AM CDT. A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE WATCH AREA. PERSONS SHOULD WATCH FOR THREATENING WEATHER AND LISTEN TO NOAA WEATHER RADIO... COMMERCIAL RADIO OR TELEVISION FOR FURTHER INFORMATION. SQI
Special weather statement, Jun 12, 5:06 AM CDT, 33 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-121110- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 505 AM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WILL MOVE THROUGH MONONA COUNTY IOWA... AT 502 AM CDT A VERY STRONG THUNDERSTORM WAS BETWEEN CASTANA AND SOLDIER IOWA...40 TO 50 MILES SOUTH EAST OF SIOUX CITY. THIS STORM WILL PRODUCE PEA TO MARBLE SIZE HAIL...FREQUENT LIGHTNING AND BRIEF HEAVY RAIN AS IT MOVES THROUGH SOLDIER IOWA BY AROUND 530 AM CDT. OTHER THUNDERSTORM CONTINUED IN A LINE FROM JUST SOUTH OF SIOUX CITY TO NEAR SOLDIER IOWA. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA UNTIL 11 AM CDT.d A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE WATCH AREA. PERSONS SHOULD WATCH FOR THREATENING WEATHER AND LISTEN TO NOAA WEATHER RADIO... COMMERCIAL RADIO OR TELEVISION FOR FURTHER INFORMATION. SQI
Special weather statement, Jun 12, 5:35 AM CDT, 4 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-121140- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 535 AM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM CONTINUES IN MONONA COUNTY IOWA... AT 532 AM CDT A VERY STRONG THUNDERSTORM EXTENDED FROM SOLDIER TO JUST WEST OF UTE IOWA...50 MILES SOUTHEAST OF SIOUX CITY. THE STORM WILL PRODUCE PEA TO MARBLE SIZE HAIL...FREQUENT LIGHTNING AND HEAVY RAIN AS IT MOVES THROUGH SOLDIER AND UTE IOWA THROUGH 6 AM CDT. THIS STORM WAS PART OF A LINE OF THUNDERSTORMS WHICH EXTENDED FROM JUST WEST OF WAKEFIELD NEBRASKA TO UTE IOWA. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA UNTIL 11 AM CDT. A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE WATCH AREA. PERSONS SHOULD WATCH FOR THREATENING WEATHER AND LISTEN TO NOAA WEATHER RADIO... COMMERCIAL RADIO OR TELEVISION FOR FURTHER INFORMATION. SQI N
Special weather statement, Jun 12, 5:36 AM CDT, 3 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-121140- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 535 AM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM CONTINUES IN MONONA COUNTY IOWA... AT 532 AM CDT A VERY STRONG THUNDERSTORM EXTENDED FROM SOLDIER TO JUST WEST OF UTE IOWA...50 MILES SOUTHEAST OF SIOUX CITY. THE STORM WILL PRODUCE PEA TO MARBLE SIZE HAIL...FREQUENT LIGHTNING AND HEAVY RAIN AS IT MOVES THROUGH SOLDIER AND UTE IOWA THROUGH 6 AM CDT. THIS STORM WAS PART OF A LINE OF THUNDERSTORMS WHICH EXTENDED FROM JUST WEST OF WAKEFIELD NEBRASKA TO UTE IOWA. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA UNTIL 11 AM CDT. A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE WATCH AREA. PERSONS SHOULD WATCH FOR THREATENING WEATHER AND LISTEN TO NOAA WEATHER RADIO... COMMERCIAL RADIO OR TELEVISION FOR FURTHER INFORMATION. SQI N
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 59 min |
| Jun 12, 6:51 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 69 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.