Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 30, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 5, 1990, 12:39 AM CDT for Monona County, Plymouth County, Woodbury County, Iowa. It was in force for 66 min. 2 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
- Jun 5, 1990, 12:39 AM CDT (05:39 UTC)
- Expired
- Jun 5, 1990, 1:45 AM CDT
- In force
- 66 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Monona County, IA, Plymouth County, IA, Woodbury County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 5, 1:10 AM CDT | Thunderstorm Wind 50 | Woodbury, IA | |
| Jun 5, 1:26 AM CDT | Thunderstorm Wind 50 | 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 (KOAX), launched 00:00Z, 5.7 hours before the alert went out and 122 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
- 3602 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 492 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSUX 050539
SVRSUX
IAC133-149-193-050645-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
1239 AM CDT TUE JUN 5 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 145 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE WEST CENTRAL PART OF IOWA
MONONA...WOODBURY...
IN THE NORTHWEST PART OF IOWA
PLYMOUTH...
AT 1235 AM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
MOVING INTO THE WESTERN PARTS OF MONONA...WOODBURY AND PLYMOUTH
COUNTIES. THE STORMS EXTENDED FROM 35 MILES NORTH OF SIOUX CITY TO
40 MILES SOUTH OF SIOUX CITY AND WERE MOVING EAST AT 40 MILES AN H
OUR.
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.
KROPPWhat 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 5, 12:26 AM CDT, 13 minutes before
IAZ001-004-005-050615- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1220 AM CDT TUE JUN 5 1990 ...THUNDERSTORMS WITH STRONG GUSTY WINDS IN SIOUXLAND AREA... AT 1215 AM CDT RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS MOVING EAST ACROSS THE SIOUXLAND AREA AT 35 TO 40 MILES AN HOUR. THESE STORMS WERE ACCOMPANIED BY STRONG GUSTY WINDS CAPABLE OF DOWNING DEAD TREES AND BRANCHES. A GUST OF 42 MILES AN HOUR WAS RECORDED BY THE NATIONAL WEATHER SERVICE AT THE SIOUX GATEWAY AIRPORT AT SIOUX CITY AT 1159 AM CDT. THESE THUNDERSTORMS EXTENDED ALONG BOTH SIDES OF THE MISSOURI AND BIG SIOUX RIVERS FROM NEAR SIOUX FALLS SOUTH DAKOTA...THROUGH SIOUX CITY TO JUST NORTH OF OMAHA NEBRASKA. THEY WILL AFFECT THE SIOUXLAND AREA WITH WIND GUSTS TAROUND 45 MILES AN HOUR AND BRIEF HEAVY RAIN THROUGH 200 AM CDT. KROPP
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 1:19 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 56 min |
| Jun 5, 1:45 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 30 min |
| Jun 5, 2:20 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 25 min |
| Jun 5, 3:56 AM CDT | Severe Thunderstorm Warning | FSD | Osceola | 49 min |
| Jun 5, 3:56 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 34 min |
| Jun 5, 4:13 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 62 min |
| Jun 5, 4:42 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 63 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm warning in 1990
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.