Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 69, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 7, 1992, 10:38 PM CDT for Plymouth County, Woodbury County, Iowa. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 7, 1992, 10:38 PM CDT (03:38 UTC)
- Expired
- Jul 7, 1992, 11:15 PM CDT
- In force
- 37 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Plymouth County, IA, Woodbury County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 10:40 PM CDT | Hail 2.75 | Plymouth, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 3.6 hours before the alert went out and 140 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
- 2090 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1219 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSUX 080339 COR
SVRSUX
IAC149-193-080415-
BULLETIN - IMMEDIATE BROADCAST REQUESTED...CORRECTED VALID TIME TO 1115
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
1039 PM CDT TUE JUL 7 1992
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTHWEST PART OF IOWA
SOUTHERN PLYMOUTH...
IN THE WEST CENTRAL PART OF IOWA
NORTHERN WOODBURY...
AT 1035 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTH
OF DOWNTOWN SIOUX CITY. MOVEMENT WAS EAST AT 35 MILES AN HOUR.
THIS STORM WILL PASS THROUGH SIOUX CITY BY 1055 PM AND WILL MOVE
THROUGH MOVILLE AND KINGSLEY IOWA BY 1115 PM.
LARGE HAIL AND VERY HEAVY RAIN ARE LIKELY WITH THIS STORM.
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.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT. IF A
TORNADO IS SIGHTED GO TO A BASEMENT SHELTER OR INTERIOR ROOM ON
LOWEST FLOOR. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED
BUILDING.
ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORTS
OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.
DROZDWhat 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, Jul 7, 8:22 PM CDT, 2 hours 16 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-080230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 822 PM CDT TUE JUL 7 1992 ...THUNDERSTORMS WERE DEVELOPING OVER SOUTHEAST SOUTH DAKOTA... AT 820 PM CDT A THUNDERSTORM WAS 45 MILES NORTHWEST OF SIOUX CITY NEAR BERESFORD SOUTH DAKOTA. THIS WAS PART OF A LARGER AREA OF THUNDERSTORMS WHICH EXTENDED FURTHER WEST. MOVEMENT WAS EAST AT 35 MILES AN HOUR. THESE THUNDERSTORMS ARE CAP ABLE OF PRODUCING SMALL HAIL AND WIND GUSTS UP TO 40 MILES AN HOUR. THEY WILL PASS THROUGH AKRON IOWA AND ELK POINT SOUTH DAKOTA BY 9 PM. DROZD
Special weather statement, Jul 7, 8:39 PM CDT, 1 hour 59 minutes before
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
Special weather statement, Jul 7, 9:02 PM CDT, 1 hour 36 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-080240- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 902 PM CDT TUE JUL 7 1992 ...STRONG THUNDERSTORMS WERE OVER SOUTHEAST SOUTH DAKOTA... AT 9 PM CDT THUNDERSTORMS WERE SOUTH OF A LINE FROM CHATASWORTH IOWA... MILES NORTH OF SIOUX CITY TO JUNCTION CITY SOUTH DAKOTA. MOVEMENT WAS EAST AT 40 MILES AN HOUR. THESE THUNDERSTORMS WILL LIKELY PRODUCE SMALL HAIL...WIND GUSTS TO 40 MILE'S AN HOUR AND VERY HEAVY RAIN. THEY WILL AFFECT SPINK...NORA AND BIG SPRINGS SOUTH DAKOTA THROUGH 930 PM. DROZD
Special weather statement, Jul 7, 10:20 PM CDT, 18 minutes before
SDZ017-019-020-080415- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1020 PM CDT TUE JUL 7 1992 AT 1015 A THUNDERSTORM WITH VERY HEAVY RAIN...SMALL HAIL AND POSSIBLY STRONG GUSTY WINDS LOCATED 50 MILES WEST NORTHWEST OF YANKTON OR JUST NORTH OF ANDES WAS MOVING SOUTHEAST AT 35 MPH. THIS THUNDERSTORM WILL CONTINUE TO AFFECT PEOPLE IN EASTERN CHARLES MIX COUNTY INCLUDING THE CITIES OF WAGNER AND AVON THROUGH 1045 PM. PERSONS IN THE PATH OF THIS STORM SHOULD SEEK SAFE SHELTER AS THIS STORM APPROACHES. BIER NONE OF THESE THUNDERSTORMS ARE CURRENTLY SEVERE. HOWEVER...PERSONS IN THEIR PATHS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND SEEK SAFE SHELTER IF NECESSARY. LISTEN TO RADIO OR TV FOR LATER STATEMENTS AND POSSIBLE WARNINGS. GEELHART
Local storm report, Jul 7, 10:31 PM CDT, 7 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX CITY IA
2232 PM CDT TUE JUL 7 1992
TIME EVENT AND LOCATION
1015 PM CDT PLYMOUTH COUNTY SHERIFF REPORTED 3/4 INCH HAIL AT AKRON
IOWA. NUMEROUS 4 TO 6 INCH DIAMETER TREE LIMBS DOWN IN
WESTFIELD IOWA.
J. QUINNSpecial weather statement, Jul 7, 10:38 PM CDT, 0 minutes before
SDZ017-019-020-080415- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1035 PM CDT TUE JUL 7 1992 AT 1030 A THUNDERSTORM WITH VERY HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS LOCATED 35 MILES WEST NORTHWEST OF YANKTON OR JUST SOUTH OF DELMONT WAS MOVING EAST SOUTHEAST AT 35 MPH. THE STRONGEST PART OF THIS THUNDERSTORM IS EXPECTED TO MOVE NORTH OF TYNDALL BY AROUND 1045 PM AND POSSIBLY REACH TABOR BY 11 PM CDT. PERSONS IN THgE PATH OF THIS STORM SHOULD SEEK SAFE SHELTER AS THIS STORM APPROACHES. BIER GEELHART
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 10:02 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 28 min |
| Jul 7, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 48 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.