Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 22, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 6, 1994, 4:33 PM CDT for Osceola County, Iowa. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Jun 6, 1994, 4:33 PM CDT (21:33 UTC)
- Expired
- Jun 6, 1994, 5:30 PM CDT
- In force
- 57 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Osceola County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 9.6 hours before the alert went out and 230 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
- 9 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 1315 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 144 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 KFSD 062133 RRA
SVRFSD
IAC143-062230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
433 PM CDT MON JUN 6 1994
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTHWEST PART OF IOWA
OSCEOLA
AT 425 PM CDT A SEVERE THUNDERSTORM WAS LOCATED JUST SOUTH OF
SIBLEY IOWA MOVING SOUTHEAST AT 10 MPH.
THIS THUNDERSTORM SHOULD MOVE INTO AREAS AROUND MELVIN AND MAY CITY
BETWEEN 5 PM AND 530 PM.
AT 4 PM CDT 55 MPH WINDS AND MARBLE TO GOLF BALL SIZE HAIL WAS
REPORTED AT SIBLEY.
IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A REINFORCED
SHELTER. A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS OF
60 MPH..HAIL 3/4 INCH OR LARGER..DEADLY LIGHTNING..AND HEAVY RAIN
THAT CAN QUICKLY FLOOD A LOW LYING AREA.
THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR
NO ADVANCE WARNING SO BE ON THE LOOKOUT.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, 2:01 PM CDT, 2 hours 32 minutes before
SDZ056-062-MNZ097-098-061945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 200 PM CDT MON JUN 6 1994 ...THUNDERSTORM DEVELOPING RAPIDLY OVER SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINNESOTA... A LINE OF THUNDERSTORMS HAVE DEVELOPED RAPIDLY OVER SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINNESOTA THIS AFTERNOON. THESE THUNDERSTORMS EXTEND FROM CENTRAL MOODY COUNTY SOUTH DAKOTA...NEAR FLANDREAU...SOUTHEAST INTO ROCK COUNTY MINNESOTA NEAR HARDWICK. LOCAL HEAVY RAIN AND SMALL HAIL IS LIKELY WITH THESE STORMS AS THEY MOVE TO THE EAST AT 15 TO 20 MPH ACROSS SOUTHEAST SOUTH DAKOTA AND SOUTHWEST MINNESOTA. PERSONS IN THE PATH OF THESE STORMS SHOULD BE PREPARED TO TAKE COVER AND MOVE TO A SAFE REINFORCED SHELTER IF NECESSARY. STAY OUT OF LOW LYING AREAS AS HEAVY RAIN MAY PRODUCE LOCAL AREAS OF FLOODING. > ADDITIONAL STATEMENTS ON THESE THUNDERSTORMS WILL BE ISSUED AS NEEDED. IN THE MEANTIME...THUNDERSTORMS ARE EXPECTED TO CONTINUE TO DEVELOP OVER MUCH OF SOUTH DAKOTA INTO THE EVENING SO PERSON SHOULD STAYED TUNED FOR THE LASTEST WEATHER INFORMATION. HARMON
Special weather statement, Jun 6, 2:20 PM CDT, 2 hours 13 minutes before
SDZ038-062025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 220 PM CDT MON JUN 06 1994 A LINE OF THUNDERSTORMS HAD DEVELOPED RAPIDLY JUST WEST OF HURON AND WAS MOVING EAST AT 25 MILES AN HOUR. SMALL HAIL...BRIEF HEAVY RAINS AND DANGEROUS LIGHTNING CAN BE EXPECTED FROM THESE THUNDERSTORMS. IF THREATENING WEATHER APPROACHES...SEEK COVER. STOREY
Special weather statement, Jun 6, 2:21 PM CDT, 2 hours 12 minutes before
SDZ038-062025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 220 PM CDT MON JUN 06 1994 A LINE OF THUNDERSTORMS HAD DEVELOPED RAPIDLY JUST WEST OF HURON AND WAS MOVING EAST AT 25 MILES AN FHOUR. SMALL HAIL...BRIEF HEAVY RAINS AND DANGEROUS LIGHTNING CAN BE EXPECTED FROM THESE THUNDERSTORMS. IF THREATENING WEATHER APPROACHES...SEEK COVER. STOREY
Special weather statement, Jun 6, 3:54 PM CDT, 39 minutes before
IAZ013-020-021-031-032-043-SDZ071-062215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 354 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHWEST IOWA AND SOUTHEAST SOUTH DAKOTA UNTIL 8 PM CDT... NO SEVERE WEATHER WAS OCCURRING IN THE AREA AT 350 PM. HOWEVER STRONG THUNDERSTORMS WILL MOVE NEAR HARTLEY IOWA...70 MILES NORTHEAST OF SIOUX CITY BETWEEN 430 AND 5 PM. THE STORMS MAY PRODUCE LARGE HAIL...STRONG WINDS AND LOCALLY HEAVY RAIN. HOPPES
Special weather statement, Jun 6, 3:55 PM CDT, 38 minutes before
IAZ013-020-021-031-032-043-SDZ071-062215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 354 PM CDT MON JUN 6 1994 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHWEST IOWA AND SOUTHEAST SOUTH DAKOTA UNTIL 8 PM CDT... NO SEVERE WEATHER WAS OCCURRING IN THE AREA AT 350 PM. HOWEVER STRONG THUNDERSTORMS WILL MOVE NEAR HARTLEY IOWA...70 MILES NORTHEAST OF SIOUX CITY BETWEEN 430 AND 5 PM. THE STORMS MAY PRODUCE LARGE HAIL...STRONG WINDS AND LOCALLY HEAVY RAIN. HOPPES
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 4:30 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 45 min |
| Jun 6, 5:14 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 24 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.