Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 53, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 12, 1994, 9:05 PM CDT for Woodbury County, Iowa. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1994, 9:05 PM CDT (02:05 UTC)
- Expired
- Jun 12, 1994, 9:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Woodbury County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 122 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
- 4262 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1255 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 514 m²/s²
- Significant tornado parameter
- 4.3
- Supercell composite
- 35.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KSUX 130207 RRA SVRSUX IAC193-130245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA 905 PM CDT SUN JUN 12 1994 THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL IOWA ...WOODBURY COUNTY AT 904 PM CDT A SEVERE THUNDERSTORM WAS LOCATED FROM 30 MILES EAST OF SIOUX CITY NEAR ANTHON IOWA TO NEAR SERGEANT BLUFF IOWA. MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR. THE THUNDERSTORM WILL REACH SALIX AND HORNICK BY 930 PM. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITHOUT WARNING. IF A TORNADO IS SIGHTED GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR GET INTO A DITCH OR DEPRESSION...COVER YOUR HEAD WITH HOPPES
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, 7:38 PM CDT, 1 hour 27 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-130130- SPECIAL WEATHER STATEMENT...CORREXTION TYPO NATIONAL WEATHER SERVICE SIOUX CITY IA 738 PM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WILL BE WEST OF SIOUX CITY... AT 731 PM CDT A STRONG THUNDERSTORM WAS 10 MILES SOUTHWEST OF NEWCASTLE NEBRASKA OR 30 MILES WEST OF SIOUX CITY. MOVEMENT WAS EAST AT 25 MILES AN HOUR. THIS STORM WILL PASS BETWEEN NEWCASTLE AND MARTINSBURG NEBRASKA BETWEEN 745 AND 815 PM. PEA TO MARBLE SIZED HAIL...GUSTY WIND UP TO 55 MILES AN HOUR AND HEAVY RAIN ARE POSSIBLE WITH THIS STORM. THIS STORM WAS PART OF A LINE THAT STRETCHED FROM SHELDON IOWA TO NEWCASTLE NEBRASKA. A TORNADO WATCH REMAINS IN EFFECT FOR ALL BUT THURSTON COUNTY UNTIL 10 PM. THURSTON COUNTY IS IN A TORNADO WATCH UNTIL MIDNIGHT. MICHELS
Special weather statement, Jun 12, 7:39 PM CDT, 1 hour 26 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-130130- SPECIAL WEATHER STATEMENT...CORREXTION TYPO NATIONAL WEATHER SERVICE SIOUX CITY IA 738 PM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WILL BE WEST OF SIOUX CITY... AT 731 PM CDT A STRONG THUNDERSTORM WAS 10 MILES SOUTHWEST OF NEWCASTLE NEBRASKA OR 30 MILES WEST OF SIOUX CITY. MOVEMENT WAS EAST AT 25 MILES AN HOUR. THIS STORM WILL PASS BETWEEN NEWCASTLE AND MARTINSBURG NEBRASKA BETWEEN 745 AND 815 PM. PEA TO MARBLE SIZED HAIL...GUSTY WIND UP TO 55 MILES AN HOUR AND HEAVY RAIN ARE POSSIBLE WITH THIS STORM. THIS STORM WAS PART OF A LINE THAT STRETCHED FROM SHELDON IOWA TO NEWCASTLE NEBRASKA. A TORNADO WATCH REMAINS IN EFFECT FOR ALL BUT THURSTON COUNTY UNTIL 10 PM. THURSTON COUNTY IS IN A TORNADO WATCH UNTIL MIDNIGHT. MICHELS
Special weather statement, Jun 12, 7:43 PM CDT, 1 hour 22 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-130145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 743 PM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WAS NORTH OF SIOUX CITY... AT 738 PM CDT A STRONG THUNDERSTORM WAS 25 MILES NORTH OF SIOUX CITY OR AT AKRON IOWA. MARBLE SIZED HAIL AND WIND GUSTS TO 35 MILES AN HOUR WERE REPORTED WITH THIS THUNDERSTORM. A STRONG THUNDERSTORM WAS ALSO NEAR NEWCASTLE NEBRASKA AND COULD PRODUCE PEA TO MARBLE SIZED HAIL BETWEEN NEWCASTLE AND MARTINSBURG NEBRASKA. MOVEMENT OF THESE STORMS WAS EAST AT 25 MILES AN HOUR. BETWEEN AKRON AND BRUNSFIELD IOWA EXPECT SMALL HAIL AND GUSTY WIND. A TORNADO WATCH IS IN EFFECT FOR ALL BUT THURSTON COUNTY UNTIL 10 PM. THURSTON COUNTY IS IN A TORNADO WATCH UNTIL MIDNIGHT. MICHELS &
Special weather statement, Jun 12, 7:44 PM CDT, 1 hour 21 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-130145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 743 PM CDT SUN JUN 12 1994 ...A STRONG THUNDERSTORM WAS NORTH OF SIOUX CITY... AT 738 PM CDT A STRONG THUNDERSTORM WAS 25 MILES NORTH OF SIOUX CITY OR AT AKRON IOWA. MARBLE SIZED HAIL AND WIND GUSTS TO 35 MILES AN HOUR WERE REPORTED WITH THIS THUNDERSTORM. A STRONG THUNDERSTORM WAS ALSO NEAR NEWCASTLE NEBRASKA AND COULD PRODUCE PEA TO MARBLE SIZED HAIL BETWEEN NEWCASTLE AND MARTINSBURG NEBRASKA. MOVEMENT OF THESE STORMS WAS EAST AT 25 MILES AN HOUR. BETWEEN AKRON AND BRUNSFIELD IOWA EXPECT SMALL HAIL AND GUSTY WIND. A TORNADO WATCH IS IN EFFECT FOR ALL BUT THURSTON COUNTY UNTIL 10 PM. THURSTON COUNTY IS IN A TORNADO WATCH UNTIL MIDNIGHT. MICHELS &
Special weather statement, Jun 12, 8:47 PM CDT, 18 minutes before
SDZ019>023-033>039-045-048-051>054-130300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 847 PM CDT SUN JUN 12 1994 ...TORNADO WATCH HAS BEEN CANCELED FOR CENTRAL AND EAST CENTRAL SOUTH DAKOTA.... THE TORNADO WATCH THAT WAS IN EFFECT UNTIL 10 PM CDT HAS BEEN CANCELED. NO SEVERE WEATHER WAS OCCURRING ACROSS THE AREA. THE SEVERE WEATHER HAS MOVED INTO NORTHEAST NEBRASKA AND NORTHWEST IOWA. MOHR
Special weather statement, Jun 12, 8:48 PM CDT, 17 minutes before
SDZ019>023-033>039-045-048-051>054-130300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 847 PM CDT SUN JUN 12 1994 ...TORNADO WATCH HAS BEEN CANCELED FOR CENTRAL AND EAST CENTRAL SOUTH DAKOTA.... THE TORNADO WATCH THAT WAS IN EFFECT UNTIL 10 PM CDT HAS BEEN CANCELED. NO SEVERE WEATHER WAS OCCURRING ACROSS THE AREA. THE SEVERE WEATHER HAS MOVED INTO NORTHEAST NEBRASKA AND NORTHWEST IOWA. MOHR
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 8:01 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 29 min |
| Jun 12, 8:18 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 27 min |
| Jun 12, 8:23 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 52 min |
| Jun 12, 8:23 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 37 min |
| Jun 12, 8:46 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 29 min |
| Jun 12, 9:01 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 29 min |
| Jun 12, 9:13 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 46 min |
| Jun 12, 9:46 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 29 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.