Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 9, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 25, 1994, 9:09 PM CDT for Osceola County, Iowa. It was in force for 23 min.
The area
The counties it named.
The facts
- Issued
- Apr 25, 1994, 9:09 PM CDT (02:09 UTC)
- Expired
- Apr 25, 1994, 9:32 PM CDT
- In force
- 23 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Osceola County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 2.2 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
- 8 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 461 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 571 m²/s²
- 0-3 km storm-relative helicity
- 698 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.8
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, Apr 25, 5:21 PM CDT, 3 hours 48 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-252315- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE SIOUX CITY IA 520 PM CDT MON APR 25 1994 ...STRONG THUNDERSTORMS WILL MOVE INTO THE AREA... AT 518 PM CDT STRONG THUNDERSTORMS WERE LOCATED SOUTH OF SIOUX CITY OR FROM BURT COUNTY NEBRASKA TO MONONA COUNTY IOWA. MOVEMENT WAS NORTHWEST AT 40 MILES AN HOUR. THE THUNDERSTORMS WILL REACH PENDER AND THURSTON NEBRASKA AND MAPLETON IOWA BY 615 PM. THE STORMS WILL LIKELY PRODUCE HAIL AND STRONG WINDS. IF THREATENING WEATHER APPROACHES YOU SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY. HOPPES
Local storm report, Apr 25, 7:50 PM CDT, 1 hour 19 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX CITY IA
750 PM CDT MON APR 25 19943
...STORM REPORT FOR MONDAY APRIL 25...
ALL TIMES CDT...
550 PM WOODBURY COUNTY IOWA - SIOUX GATEWAY AIRPORT...3/4 INCH HAIL.
600 PM DIXON COUNTY NEBRASKA - SOUTHWEST OF ALLEN...25 MILES SOUTHWEST
OF SIOUX CITY...1/2 INCH HAIL REPORTED BY DIXON COUNTY SPOTTERS.
TIME APPROXIMATE.
605 PM DIXON COUNTY NEBRASKA - FUNNEL CLOUD SPOTTED 2 MILES SOUTH OF
ALLEN BY THE ALLEN FIRE CHIEF. TIME APPROXIMATE.
607 PM WOODBURY COUNTY IOWA - SIOUX GATEWAY AIRPORT...1/4 INCH HAIL.
610 PM DIXON COUNTY NEBRASKA - ALLEN...MARTINSBURG AND PONCA...20 TO
30 MILES WEST OF SIOUX CITY...PEA TO MARBLE SIZE HAIL. REPORTED
BY DIXON COUNTY SPOTTERS.
612 PM UNION COUNTY SOUTH DAKOTA - ELK POINT SOUTH DAKOTA...20 MILES
NORTHWEST OF SIOUX CITY...MARBLE SIZE HAIL ELK POINT SOUTH
DAKOTA. HAIL REPORTED BY ELK POINT SPOTTERS.
633 PM PLYMOUTH COUNTY IOWA - NORTHWEST OF LEMARS...25 MILES
NORTHEAST OF SIOUX CITY...FUNNEL CLOUD REPORTED BY PLYMOUTH
COUNTY CIVIL DEFENSE.
645 PM PLYMOUTH COUNTY IOWA - LEMARS...TREES AND POWER LINES DOWN.
645 PM PLYMOUTH COUNTY IOWA - 2 MILES SOUTH OF LEMARS ON COUNTY
ROAD C38...20 MILES NORTHEAST OF SIOUX CITY...PART OF THE
NIPCO BUILDING LAYING ACROSS THE ROAD.
645 PM PLYMOUTH COUNTY IOWA - LEMARS STORM CENTER LEMARS REPORTED
PEA SIZE HAIL
700 PM WOODBURY COUNTY IOWA - PIERSON...30 MILES EAST OF SIOUX CITY
1/2 HAIL REPORTED BY SPOTTERS.
HUMPHREYSpecial weather statement, Apr 25, 8:28 PM CDT, 41 minutes before
IAC133-149-193-NEC043-051-173-260230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 828 PM CDT MON APR 25 1994 ...THUNDERSTORMS CONTINUE ACROSS THE AREA... THUNDERSTORMS HAVE REDEVELOPED SOUTH AND EAST OF SIOUX CITY. AT 825 PM CDT SCATTERED THUNDERSTORMS EXTENDED FROM NEAR SERGEANT BLUFF TO WINNEBAGO NEBRASKA. OTHER THUNDERSTORMS WERE LOCATED 25 MILES EAST OF SIOUX CITY AT ANTHON AND 30 MILES SOUTHEAST OF SIOUX CITY NEAR WHITING IOWA. MOVEMENT WAS NORTH AT 40 MILES AN HOUR. THE THUNDERSTORMS WILL PRODUCE SMALL HAIL...GUSTY WINDS AND LOCALLY HEAVY RAIN. TORNADO WATCHES ARE IN EFFECT UNTIL FOR FAR NORTHEAST NEBRASKA AND FAR SOUTHEAST SOUTH DAKOTA UNTIL 10 PM AND FO.R COUNTIES IN NORTHWEST IOWA UNTIL 1 AM CDT. HOPPES
Local storm report, Apr 25, 8:39 PM CDT, 30 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX CITY IA
839 PM CDT MON APR 25 19943
...STORM REPORT FOR MONDAY APRIL 25...
ALL TIMES CDT...
530 PM THURSTON COUNTY NEBRASKA - POWER OUT IN PENDER. TIME
APPROXIMATE.
539 PM WOODBURY COUNTY IOWA - PEA TO MARBLE SIZE HAIL REPORTED BY THE
WOODBURY COUNTY EOC AT CLIMBING HILL...20 MILES SOUTHEAST OF
CITY.
542 PM WOODBURY COUNTY IOWA - 7/8 INCH HAIL AND WIND GUST 52 MILES AN
HOUR REPORTED BY WOOODBURY COUNTY EOC AT CLIMBING HILL.
545 PM WOODBURY COUNTY IOWA - SIOUX GATEWAY AIRPORT...WIND GUST OF 63
MILES AN HOUR.
555 PM THURSTON COUNTY NEBRASKA - SOUTH SIOUX CITY...PEA SIZE HAIL
REPORTED BY DAKOTA COUNTY SHERIFF.
555 PM THURSTON COUNTY NEBRASKA - EMERSON...GOLF BALL SIZE HAIL
REPOORTED BY THURSTON COUNTY SHERIFF.
HUMPHREYLocal storm report, Apr 25, 9:00 PM CDT, 9 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX CITY IA
900 PM CDT MON APR 25 1994
...STORM REPORT FOR MONDAY APRIL 25...
ALL TIMES CDT...
600 PM DAKOTA COUNTY NEBRASKA - SOUTH SIOUX CITY...1/4 INCH HAIL
REPORTED BY OFF DUTY WEATHER SERVICE PERSONNEL.
605 PM WOODBURY COUNTY IOWA - SIOUX GATEWAY AIRPORT...WIND GUST 46
MILES AN HOUR.
609 PM DAKOTA COUNTY NEBRASKA - SOUTH SIOUX CITY...1/2 INCH HAIL
REPORTED BY OFF DUTY WEATHER SERVICE PERSONNEL.
636 PM UNION COUNTY SOUTH DAKOTA - JEFFERSON...10 MILES NORTHWEST OF
SIOUX CITY...3/4 INCH HAIL REPORTED BY UNION COUNTY POLICE.
845 PM DIXON COUNTY NEBRASKA - ESTIMATED DOLLAR AMOUNT OF DAMAGE IN
IN ENTIRE COUNTY...95 THOUSAND DOLLARS.
HUMPHREYLocal storm report, Apr 25, 9:08 PM CDT, 1 minute before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
910 PM CDT MON APR 25 1994
STORM DATA FOR MONDAY EVENING APR 25 1994
TIME COUNTY...LOCATION AND STATE CHARACTER OF STORM...DAMAGE
.......................................................................
615 PM CDT YANKTON...WRN YANKTON SD 60 MPH WIND...TREE DOWN...
BUILDING DAMAGED
620 PM CDT YANKTON...1 MILE W UTICA SD LARGE BRANCHES DOWN...MARBLE
SIZE HAIL...ROOF DAMAGED
625 PM CDT UNION...3SW OF BERESFORD SD 60 MPH WINDS
630 PM CDT YANKTON...1 MILE E UTICA SD MACHINE SHED AND GRAIN BIN DOWN
645 PM CDT UNION...14E OF BERESFORD SD 1-2 INCH DIAMETER LIMBS DOWN
645 PM CDT UNION...2N ALCESTER SD 6 INCH DIAMETER LIMBS DOWN
650 PM CDT LINCOLN...SW SIOUX FALLS SD WIND GUST TO 75 MPH
710 PM CDT MINNEHAHA...RENNER SD DAMAGE AT BALL PARK...HIGHLINES
DOWN AT LEGION BUILDING
710 PM CDT MINNEHAHA...1/2 MILE W VALLEY SPRINGS SD TORNADO
712 PM CDT LYON...ROCK RAPIDS IA TORNADO
715 PM CDT MINNEHAHA...GARRETSON SD TORNADO
825 PM CDT JACKSON...HERON LAKE MN 50-60 MPH WINDS AND
SMALL HAIL
RGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:41 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 49 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.