Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 43, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 12, 1994, 6:51 PM CDT for Lyon County, Iowa; Rock County, Minnesota. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1994, 6:51 PM CDT (23:51 UTC)
- Expired
- Jun 12, 1994, 8:00 PM CDT
- In force
- 69 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lyon County, IA, Rock County, MN
The nearest sounding before it
Aberdeen, SD (KHON), launched 12:00Z, 11.9 hours before the alert went out and 231 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
- 1741 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 5:08 PM CDT, 1 hour 43 minutes before
MNZ071-072-080-081-089-090-097-098-122310- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 506 PM CDT SUN JUN 12 1994 ...STRONG THUNDERSTORMS MOVE INTO SOUTHWEST MINNESOTA... AT 505 PM CDT RADAR INDICATED THAT STRONG THUNDERSTORMS MOVED INTO SOUTHWEST MINNESOTA. THE STRONGEST STORMS WERE LOCATED ACROSS PIPESTONE AND ROCK COUNTIES. STORMS WERE MOVING SOUTHEAST AT 20 MILES AN HOUR. THESE STORMS MAY PRODUCE BRIEF HEAVY RAIN...GUSTY WINDS...AND SMALL HAIL. PEOPLE IN PIPESTONE...MARSHALL...WORTHINGTON...AND OTHER TOWNS IN SOUTHWEST MINNESOTA SHOULD MONITOR NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR THE LATEST ON THESE STORMS OVER THE NEXT FEW HOURS. MENTZER
Special weather statement, Jun 12, 5:16 PM CDT, 1 hour 35 minutes before
SDZ062-122320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 516 PM CDT SUN JUN 12 1994 ...STRONG THUNDERSTORM DEVELOPING OVER NORTHWEST MINNEHAHA COUNTY... AT 510 PM CDT RADAR SHOWED A STRONG THUNDERSTORM OVER NORTHWEST MINNEHAHA COUNTY OF SOUTHEAST SOUTH DAKOTA. THE STORM WAS LOCATED 20 MILES NORTHWEST OF SIOUX FALLS NEAR COLTON. MOVEMENT WAS TO THE EAST AT 20 MPH. THIS STORM WILL AFFECT NORTHERN MINNEHAHA COUNTY THROUGH 545 PM CDT. SMALL HAIL...HEAVY RAINS AND GUSTY WINDS CAN BE EXPECTED WITH THIS STORM. PERSONS IN NORTHERN MINNEHAHA COUNTY SHOULD KEEP ABREAST OF THIS STORM AND BE PREPARED TO TAKE ACTION IF A WARNING IS ISSUED. A TORNADO WATCH IS ALSO IN EFFECT UNTIL 10 PM CDT.
Special weather statement, Jun 12, 5:40 PM CDT, 1 hour 11 minutes before
SDZ022-023-038-039-053-054-122335- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 540 PM CDT SUN JUN 12 1994 ...TORNADO WATCH FOR MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 1000 PM CDT... AT 530 PM CDT...ISOLATED SEVERE THUNDERSTORMS CONTINUED OVER A SMALL PART OF EAST CENTRAL SOUTH DAKOTA. THESE STORMS WERE LOCATED 15 MILES SOUTHEAST OF HURON AND 20 MILES SOUTH OF WATERTOWN AND HAVE PRODUCE LARGE HAIL AND STRONG DAMAGING WINDS. PERSONS IN SOUTHEAST BEADLE...NORTHERN SANBORN...SOUTHEAST HAMLIN AND SOUTHERN DEUEL COUNTIES SHOULD REMAIN ALERT FOR THREATENING WEATHER AND SEEK SHELTER IMMEDIATELY IF SIGHTED. MOVEMENT WAS EAST AT 30 MILES AN HOUR. PFEIFFER
Special weather statement, Jun 12, 5:43 PM CDT, 1 hour 8 minutes before
SDZ022-023-038-039-053-054-122335- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 540 PM CDT SUN JUN 12 1994 ...TORNADO WATCH FOR MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 1000 PM CDT... AT 530 PM CDT...ISOLATED SEVERE THUNDERSTORMS CONTINUED OVER A SMALL PART OF EAST CENTRAL SOUTH DAKOTA. THESE STORMS WERE LOCATED 15 MILES SOUTHEAST OF HURON AND 20 MILES SOUTH OF WATERTOWN AND HAVE PRODUCE LARGE HAIL AND STRONG DAMAGING WINDS. PERSONS IN SOUTHEAST BEADLE...NORTHERN SANBORN...SOUTHEAST HAMLIN AND SOUTHERN DEUEL COUNTIES SHOULD REMAIN ALERT FOR THREATENING WEATHER AND SEEK SHELTER IMMEDIATELY IF SIGHTED. MOVEMENT WAS EAST AT 30 MILES AN HOUR. PFEIFFER
Special weather statement, Jun 12, 6:14 PM CDT, 37 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-130015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 614 PM CDT SUN JUN 12 1994 ...STRONG THUNDERSTORMS WILL MOVE INTO THE AREA... STRONG THUNDERSTORMS WILL MOVE INTO DIXON COUNTY NEBRASKA BETWEEN 630 AND 7 PM. THESE STORMS HAVE HAD A HISTORY OF PRODUCING HAIL. DIXON COUNTY IS ABOUT 25 MILES WEST OF SIOUX CITY. OTHERS STORMS WERE DEVELOPING NORTHWEST OF SIOUX CITY NEAR NORA SOUTH DAKOTA OR 35 MILES NORTHWEST OF SIOUX CITY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM FOR ALL BUT THURSTON COUNTY NEBRASKA. THURSTON COUNTY IS ALSO IN A TORNADO WATCH UNTIL MIDNIGHT. MICHELS
Special weather statement, Jun 12, 6:15 PM CDT, 36 minutes before
IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-130015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 614 PM CDT SUN JUN 12 1994 ...STRONG THUNDERSTORMS WILL MOVE INTO THE AREA... STRONG THUNDERSTORMS WILL MOVE INTO DIXON COUNTY NEBRASKA BETWEEN 630 AND 7 PM. THESE STORMS HAVE HAD A HISTORY OF PRODUCING HAIL. DIXON COUNTY IS ABOUT 25 MILES WEST OF SIOUX CITY. OTHERS STORMS WERE DEVELOPING NORTHWEST OF SIOUX CITY NEAR NORA PSOUTH DAKOTA OR 35 MILES NORTHWEST OF SIOUX CITY. A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM FOR ALL BUT THURSTON COUNTY NEBRASKA. THURSTON COUNTY IS ALSO IN A TORNADO WATCH UNTIL MIDNIGHT. MICHELS
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 5:39 AM CDT | Severe Thunderstorm Warning | FSD | Monona | 26 min |
| Jun 12, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 59 min |
| Jun 12, 5:20 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 40 min |
| Jun 12, 5:40 PM CDT | Tornado Warning | FSD | Minnehaha | 35 min |
| Jun 12, 6:02 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 57 min |
| Jun 12, 6:23 PM CDT | Severe Thunderstorm Warning | FSD | Lake | 36 min |
| Jun 12, 5:53 PM CDT | Tornado Warning | FSD | Rock | 37 min |
| Jun 12, 6:11 PM CDT | Severe Thunderstorm Warning | FSD | Jackson | 64 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1994Severe Thunderstorm Warnings in Minnesota, 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.