Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 68, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 7, 1992, 10:02 PM CDT for Plymouth County, Iowa; Union County, South Dakota. It was in force for 28 min. 4 reports 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, 10:02 PM CDT (03:02 UTC)
- Expired
- Jul 7, 1992, 10:30 PM CDT
- In force
- 28 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Plymouth County, IA, Union County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 10:05 PM CDT | Hail 1.75 | Plymouth, IA | |
| Jul 7, 10:15 PM CDT | Hail 1.75 | Plymouth, IA | |
| Jul 7, 10:15 PM CDT | Hail 0.75 | Union, SD | |
| 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, 3.0 hours before the alert went out and 163 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 080302
SVRSUX
IAC149-SDC127-080330-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
1002 PM CDT TUE JUL 7 1992
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTHWEST PART OF IOWA
WESTERN PLYMOUTH...
IN THE SOUTHEAST PART OF SOUTH DAKOTA
UNION...
AT 10 PM RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES NORTHWEST
OF SIOUX CITY...NEAR RICHLAND SOUTH DAKOTA. MOVEMENT WAS EAST AT
30 MILES AN HOUR.
THIS STORM WILL MOVE THROUGH AKRON IOWA BY 1020 PM.
LARGE HAIL IS 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.
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, 6:50 PM CDT, 3 hours 12 minutes before
SDZ010-080045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 645 PM CDT TUE JUL 7 1992 AT 645 PM CDT...A STRONG THUNDERSTORM HAD MOVED INTO CENTRAL SOUTH DAKOTA. THE STORM WAS 40 MILES SOUTHWEST OF PIERRE...OR JUST EAST OF MURDO...MOVING EAST AT 50 MILES AN HOUR. VERY HEAVY RAIN AND HAIL ARE LIKELY OVER SOUTHEAST JONES AND SOUTHERN LYMAN COUNTY UNTIL AROUND 8 PM CDT. BECAUSE THE STORMS IS MOVING AT A HIGH SPEED...WIND GUSTS OF 5V0 MPH OR HIGHER ARE LIKELY AS WELL. SPRINGER
Special weather statement, Jul 7, 7:40 PM CDT, 2 hours 22 minutes before
SDZ010-080130- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 735 PM CDT TUE JUL 7 1992 ...A SEVERE THUNDERSTORM WARNING FOR SOUTHEAST JONES AND SOUTHWEST LYMAN COUNTIES UNTIL 8PM CDT... AT 730 PM CDT...A STRONG THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED OVER EXTREME SOUTHEAST JONES AND SOUTHWEST LYMAN COUNTY...10 MILES SOUTHWEST PRESHO OR ABOUT 35 MILES SOUTH OF PIERRE. THE STORMS WAS MOVING EAST AT 45 MILES AN HOUR. MILLER
Special weather statement, Jul 7, 7:43 PM CDT, 2 hours 19 minutes before
SDZ015-080130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 740 PM CDT TUE JUL 7 1992 ...VERY STRONG THUNDERSTORM MOVING TOWARD NORTHEAST TRIPP COUNTY IN SOUTH CENTRAL SOUITH DAKOTA... A VERY STRONG THUNDERSTORM 40 MILES NORTHWEST OF WINNER WAS MOVING SOUTHEAST AT 45 MPH AND WILL ENTER NORTHEAST TRIPP COUNTY OF SOUTH CENTRAL SOUTH DAKOTA BY 745 PM CDT AND IS EXPECTED TO AFFECT THE TOWNS OF IDEAL AND HAMILL BETWEEN ABOUT 755 PM AND 830 PM. VERY HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS AROUND 50 MPH SHOULD BE EXPECTED WITH THIS STORM. PERSONS IN THE PATH OF THIS STORM SHOULD BE PREPARED TO TAKE COVER. BIER
Special weather statement, Jul 7, 8:22 PM CDT, 1 hour 40 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 CAPABLE 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 23 minutes before
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
Special weather statement, Jul 7, 9:02 PM CDT, 1 hour 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
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 10:38 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 37 min |
| Jul 7, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 48 min |
| Jul 7, 9:09 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 51 min |
| Jul 7, 9:31 PM CDT | Severe Thunderstorm Warning | FSD | Union | 44 min |
| Jul 7, 9:52 PM CDT | Tornado Warning | FSD | Clay | 25 min |
| Jul 7, 10:41 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 49 min |
| Jul 8, 12:06 AM CDT | Severe Thunderstorm Warning | FSD | Union | 54 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Severe Thunderstorm Warnings in South Dakota, 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.