Alert archive / Iowa / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 73, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 5, 1989, 7:35 AM CDT for Ida County, Iowa. It was in force for 55 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
- Aug 5, 1989, 7:35 AM CDT (12:35 UTC)
- Expired
- Aug 5, 1989, 8:30 AM CDT
- In force
- 55 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Ida 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 |
|---|---|---|---|
| Aug 5, 7:40 AM CDT | Thunderstorm Wind 50 | Ida, 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 12:00Z, 0.6 hours before the alert went out and 138 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
- 3636 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 27 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 051235
SVRSUX
IAC093-051330-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
735 AM CDT SAT AUG 5 1989
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 830 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE WEST CENTRAL PART OF IOWA
IDA
AT 730 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST EAST OF
ANTHON IOWA...30 MILES EAST OF SIOUX CITY. THE STORM WAS MOVING
EAST AT NEAR 40 MILES AN HOUR. THIS STORM WILL PASS ACROSS THE
FOLLOWING TOWNS BETWEEN 735 AND 830 AM CDT...CORRECTIONVILLE...
CUSHING...HOLSTEIN...IDA GROVE...ARTHUR...BATTLE CREEK.
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 ENFORCIEMENT AGENCY TO RELAY YOUR REPORTS
OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.
SHERLINWhat 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, Aug 5, 4:04 AM CDT, 3 hours 31 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 400 AM CDT AUG 05 1989 ...STRONG THUNDERSTORM OVER NORTHERN UNION COUNTY SOUTH DAKOTA AND SIOUX COUNTY IOWA... AT 355 AM CDT RADAR SHOWED THAT A VERY STRONG THUNDERSTORMS HAD FORMED FROM 30 TO 40 MILES NORTH TO NORTHWEST OF SIOUX CITY...OVER NORTHERN UNION COUNTY SOUTH DAKOTA AND SOUTHWEST SIOUX COUNTY IOWA. MOVEMENT WAS EAST AT 25 MILES AN HOUR. THIS DIRECTION AND SPEED WILL TAKE THESE STORMS OVER THE TOWNS OF ALCESTER AND BIG SPRINGS IN UNION COUNTY AND HAWARDEN...CHATSWORTH...MAURICE...ORANGE CITY AND ALTON IN SIOUX COUNTY IOWA...BETWEEN 400 AND 500 AM. THESE STORMS HAVE THE POTENTIAL FOR SMALL HAIL...HEAVY RAIN SHOW*ERS... DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. RESIDENTS OF THE UNION AND PLYMOUTH COUNTY AREA SHOULD WATCH THE WEATHER CLOSELY AND BE PREPARED TO GO TO A SAFE SHELTER IF SEVERE WEATHER SHOULD DEVELOPE. SHERLIN
Special weather statement, Aug 5, 4:09 AM CDT, 3 hours 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 410 AM CDT SAT AUG 5 1989 AT 405 AM CDT A THUNDERSTORM WITH VERY HEAVY RAIN AND HAIL LOCATED 38 MILES SOUTH SOUTHEAST OF SIOUX FALLS IN SOUTHWEST SIOUX COUNTY WAS MOVING TO THE EAST AT 35 MPH. THIS STORM IS EXPECTED TO REACH SIOUX CENTER IOWA AROUND 415 AM CDT AND ALTON IOWA AROUND 430 AS IT TRACKS EASTWARD ACROSS SIOUX COUNTY. RESIDENTS OF SIOUX COUNTY...ESPECIALLY THE S2OUTHERN TWO THIRDS OF SIOUX COUNTY SHOULD BE ALERT TO THE POSSIBILITY OF STRONG GUSTY WINDS AND HAIL AS THIS THUNDERSTORM MOVES THROUGH. BIER
Special weather statement, Aug 5, 4:15 AM CDT, 3 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 400 AM CDT AUG 05 1989 ...STRONG THUNDERSTORM OVER NORTHERN UNION COUNTY SOUTH DAKOTA AND SIOUX COUNTY IOWA... AT 355 AM CDT RADAR SHOWED THAT A VERY STRONG THUNDERSTORMS HAD FORMED FROM 30 TO 40 MILES NORTH TO NORTHWEST OF SIOUX CITY...OVER NORTHERN UNION COUNTY SOUTH DAKOTA AND SOUTHWEST SIOUX COUNTY IOWA. MOVEMENT WAS EAST AT 25 MILES AN HOUR. THIS DIRECTION AND SPEED WILL TAKE THESE STORMS OVER THE TOWNS OF ALCESTER AND BIG SPRINGS IN UNION COUNTY AND HAWARDEN...CHATSWORTH...MAURICE...ORANGE CITY AND ALTON IN SIOUX COUNTY IOWA...BETWEEN 400 AND 500 AM. THESE STORMS HAVE THE POTENTIAL FOR SMALL HAIL...HEAVY RAIN SHOWERS... DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. RESIDENTS OF THE UNION AND SIOUX COUNTY AREA SHOULD WATCH THE WEATHER CLOSELY AND BE PREPARED TO GO TO A SAFE SHELTER IF SEVERE WEATHER SHOULD DEVELOPE. SHERLIN ....CORRECTION TO LAST PARA...<SIOUX COUNTRY REPLACES PLYMOUTH...
Special weather statement, Aug 5, 5:29 AM CDT, 2 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 527 AM CDT AUG 05 1989 ...VERY STRONG THUNDERSTORMS MOVING OVER OBRIEN COUNTY IOWA... AT 525 AM CDT RADAR SHOWED THAT A VERY STRONG THUNDERSTORMS FROM NEAR PAULINA TO HARTLY IOWA...50 TO 60 MILES NORTHEAST OF SIOUX CITY. THESE STORMS WERE MOVING EAST AT 35 MILES AN HOUR AND WILL PASS ACROSS PAULINA PRINGHAR...HARTLEY AND SUTHERLAND BETWEEN 525 AND 630 AM CDT. AT 522 AM THE SHERIFFS OFFICE IN PRIMGHAR REPORTED WINDS EASTIMATED AT 35 TO 40 MILES AN HOUR NEAR ARCHER...55 MILES NORTHEAST OF SIOUX CITY...AND A BRIEF PERIOD OF PEA SIZE HAIL JUST WEST OF PRIMGHAR... ABOUT 60 MILES NORTHEAST OF SIOUX CITY. RESIDENTS OF THE EASTERN HALF OF OBRIEN COUNTY SHOULD WATCH WEATHER CONDITIONS CLOSELY AND BE PREPARED TO GO TO A SAFE SHELTER IF SEVERE WEATHER SHOULD DEVELOP. SHERLIN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 4:20 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 25 min |
| Aug 5, 4:49 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 56 min |
| Aug 5, 4:49 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 26 min |
| Aug 5, 6:45 AM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 60 min |
| Aug 5, 6:45 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 60 min |
| Aug 5, 6:55 AM CDT | Severe Thunderstorm Warning | FSD | Monona | 65 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1989Every severe thunderstorm warning in 1989
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.