Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 40, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 7, 1990, 11:45 AM CDT for Dallas County, Iowa. It was in force for 20 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 7, 1990, 11:45 AM CDT (16:45 UTC)
- Expired
- Jun 7, 1990, 12:05 PM CDT
- In force
- 20 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Dallas 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 7, 11:50 AM CDT | Thunderstorm Wind 70 | Dallas, IA | |
| Jun 7, 11:50 AM CDT | Thunderstorm Wind 50 | Dallas, 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, 4.8 hours before the alert went out and 198 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
- 3632 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 123 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 KDSM 071644
SVRDSM
IAC049-071715-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1145 AM CDT THU JUN 7 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN CENTRAL IOWA
...DALLAS
AT 1140 AM...A SEVERE THUNDERSTORM WAS REPORTED IN WESTERN DALLAS
COUNTY NEAR HIGHWAY HIGHWAY 44 IN THE WESTERN PART OF THE COUNTY...OR
ABOUT 30 MILES WEST NORTHWEST OF DES MOINES. WIND GUSTS TO UP 80 MILES
AN HOUR WERE ESTIMATED BY A LINE CREW WITH TREES BLOWN OVER.
THE STORM WAS MOVING EAST NORTHEAST AT 40 MILES AN HOUR.
THE WARNING INCLUDES THE TOWNS OF PERRY...MINBURN AND WOODWARD.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED3. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
MYERSWhat 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 7, 10:44 AM CDT, 1 hour 1 minute before
IAZ009-012-071630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1045 AM CDT THU JUN 7 1990 ...STRONG THUNDERSTORMS MOVING ACROSS SOUTHWEST IOWA... AT 1045 AM...A SMALL LINE OF STRONG THUNDERSTORMS WERE MOVING ACROSS SOUTHWEST IOWA. THE LINE OF STORMS STRETCHED FROM 25 MILES EAST OF COUNCIL BLUFFS TO JUST EAST OF SHENANDOAH...AND WAS MOVING EAST AT 25 MILES AN HOUR. AT THIS RATE OF MOVEMENT...THE STORMS WILL ENTER CASS...ADAMS...AND TAYLOR COUNTIES...AND THE CITIES OF ATLANTIC...CRESTON...AND BEDFORD... BETWEEN 1045 AM AND 1130 AM. RESIDENTS IN THESE COUNTIES SHOULD REMAIN ALERT FOR WINDS OF 40 TO 50 MILES AN HOUR...SOME HAIL...AND EXTREMELY HEAVY RAINS. THESE STORMS DID PRODUCE SEVERE WEATHER AS THEY MOVED THROUGH THE OMAHA-COUNCIL BLUFFS AREA AT AROUND 10 AM THIS MORNING. TRUETT
Local storm report, Jun 7, 11:15 AM CDT, 30 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE DES MOINES IA 1115 AM CDT THU JUN 7 1990 1044 AM HARLAN AIRPORT /SHELBY COUNTY/ WIND GUST 50 MPH 1048 AM CLARINDA AIRPORT /PAGE COUNTY/ WIND GUST 50 MPH MYERS
Special weather statement, Jun 7, 11:41 AM CDT, 4 minutes before
IAZALL-071730- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1140 AM CDT THU JUN 7 1990 ...STRONG THUNDERSTORMS CONTINUE MOVING ACROSS SOUTHWEST IOWA... AT 1125 AM...A LINE OF STRONG THUNDERSTORMS COTINUE TO MOVE ACROSS SOUTHWEST INTO CENTRAL IOWA. THE LINE OF STORMS STRETCHED FROM NEAR AUDUBON TO THE IOWA/MISSOURI BORDER NEAR BEDFORD...OR FROM 70 MILES WEST THROUGH 90 MILES SOUTHWEST OF DES MOINES. THESE STORMS WERE MOVING EAST AT 45 MILES AN HOUR. THESE STRONG THUNDERSTORMS...HAVE BEEN PRODUCING VERY HEAVY RAINFALL ...FREQUENT DANGEROUS LIGHTNING...AND COULD PRODUCE STRONG GUSTY WIND AND POSSIBLY SOME SMALL HAIL. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT FOR FOR RAPIDLY CHANGING WEATHER CONDITIONS...AND BE PREPARED TO SEEK SHELTER IMMEDIATELY SHOULD THREATENING WEATHER APPROACH. OVER THE REMAINDER OF WESTERN AND CENTRAL AREAS OF THE STATE... THERE WERE NUMEROUS SHOWERS AND THUNDERSTO2RMS...ALL MOVING EAST AT AROUND 45 MILES AN HOUR. WPM
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 11:54 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 18 min |
| Jun 7, 12:01 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 23 min |
| Jun 7, 5:40 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 25 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.