Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 191, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 8, 1990, 4:22 AM CDT for Decatur County, Iowa. It was in force for 53 min.
The area
The counties it named.
The facts
- Issued
- Sep 8, 1990, 4:22 AM CDT (09:22 UTC)
- Expired
- Sep 8, 1990, 5:15 AM CDT
- In force
- 53 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Decatur County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 9.4 hours before the alert went out and 226 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
- 3556 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 10 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 080924
SVRDSM
IAC053-081015-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
422 AM CDT SAT SEP 8 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH CENTRAL IOWA
...DECATUR
AT 410 AM...AN OBSERVER AT LAMONI REPORTED HAIL OF 3/4 INCH SIZE
OCCURRING. AT 415 AM...NATIONAL WEATHER SERVICE RADAR INDICATED A
STRONG THUNDERSTORM IN THE VICINITY OF LAMONI...WHICH IS 65 TO 70
MILES SOUTH OF DES MOINES.
THE STORM WAS MOVING EAST AT 15 MILES AN HOUR.
THIS WARNING INCLUDES THE TOWNS AND CITIES OF LAMONI...LEON... DAVIS
CITY...PLEASANTON...AND NINE EAGLES STATE PARK.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOURZ HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
DOWD/KSWhat 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, Sep 7, 10:44 PM CDT, 5 hours 38 minutes before
IAZALL-080445- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1043 PM CDT FRI SEP 7 1990 AT 1029 PM...INTENSE THUNDERSTORMS WERE LOCATED IN CENTRAL IOWA...5 MILES WEST OF MONROE AND JUST NORTHEAST OF NEWTON. VERY HEAVY RAIN... SMALL HAIL...WIND TO 40 MILES AN HOUR AND FREQUENT LIGHTNING CAN BE EXPECTED. THESE STORMS WILL BE IN PELLA AND GRINELL AREAS BY AROUND 1130 PM. AN INTENSE THUNDERSTORM WAS ALSO INDICATED IN SOUTHWEST IOWA...NEAR CUMBERLAND OR 45 MILES EAST OF COUNCIL BLUFFS. VERY HEAVY RAIN... SMALL HAIL...WIND TO 40 MILES AN HOUR AND DANGEROUS LIGHTNING CAN BE EXPECTED. OTHERWISE...SHOWERS AND THUNDERSTORMS COVERED A LARGE PART OF NORTH CENTRAL...PART OF NORTHEAST...CENTRAL...WEST CENTRAL AND SOUTHWEST IOWA. THE LEADING EDGE OF THE PRECIPITATION EXTENDED FROM 35 MILES EAST OF MASON CITY...THROUGH WATERLOO...TO TAMA...TO 20 MILES EAST OF DES MOINES. THE SHOWERS AND THUNDERSTORMSo WERE MOVING SOUTHEAST AT 20 TO 25 MILES AN HOUR._ HUTTON
Special weather statement, Sep 7, 11:46 PM CDT, 4 hours 36 minutes before
IAZALL-080545- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1144 PM CDT FRI SEP 7 1990 AT 1125 PM...VERY STRONG THUNDERSTORMS WERE INDICATED IN NORTHERN MARION COUNTY NORTHWEST OF PELLA AND ALSO NEAR MONTEZUMA. THESE STORMS HAD DECREASED IN INTENSITY SINCE 11PM...BUT COULD STILL PRODUCE VERY HEAVY RAIN...WIND TO 30 MILES AN HOUR AND DANGEROUS CLOUD TO GROUND LIGHTNING. OTHER VERY STRONG THUNDERSTORMS WERE IN SOUTHWEST IOWA...FROM JUST WEST OF CRESTON TO SOUTH OF AFTON...45 TO 50 MILES SOUTHWEST OF DES MOINES. HEAY RAIN...SMALL HAIL...WIND TO 40 MILES AN HOUR AND DANGEROUS LIGHTNING CAN BE EXPECTED. OTHERWISE...SHOWERS AND THUNDERSTORMS WERE IN AN AREA BOUNDED BY A LINE FROM WEBSTER CITY...TO 50 MILES NORTH OF WATERLOO...TO 20 MILES WEST OF CEDAR RAPIDS...TO 25 MILES SOUTHEAST OF DES MOINES AND BACK TO WEBSTER CITY. OTHER SHOWERS AND THUNDERSTORMS WERE JUST WEST OF OSCEOLA AND SOUTHEAST OF GREENFIELD. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST AT 20 TO 25 MILES AN HOUR. HUTTON
Special weather statement, Sep 8, 12:46 AM CDT, 3 hours 36 minutes before
IAZALL-080645- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1240 AM CDT SAT SEP 8 1990 AT 1232 AM...ISOLATED VERY STRONG THUNDERSTORMS WERE OVER SOUTHWEST AND SOUTH CENTRAL IOWA. THE STORMS WERE 25 TO 50 MILES SOUTHWEST OF DES MOINES NEAR WINTERSET...GREENFIELD...AFTON AND MT AYR. ALONG WITH THE EXTREMELY HEAVY RAINS...PEA TO MARBLE SIZE HAIL AND WINDS TO 45 MILES AN HOUR ARE LIKELY. MOVEMENT WAS EAST 15 TO 20 MILES AN HOUR. ALSO...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS EXTENDED FROM NORTH CENTRAL AND NORTHEAST IOWA INTO THE SOUTHEASTERN COUNTIES. THE STRONG- EAST STORM WAS DUE NORTH OF OTTUMWA NEAR WHAT CHEER. AT THIS TIME ONLY BRIEF HEAVY RAINS AREA EXPECTED FROM THIS STORM. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. KS
Special weather statement, Sep 8, 1:45 AM CDT, 2 hours 37 minutes before
IAZALL-080745- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 140 AM CDT SAT SEP 8 1990 AT 129 AM...ISOLATED STRONG THUNDERSTORMS HAD DEVELOPED OVER CENTRAL IOWA DURING THE PAST HOUR. THE STORMS NOW EXTENDED FROM DALLAS CENTER TO JUST WEST OF THE DES MOINES METRO AREA. ALONG WITH THE HEAVY RAINS ...WINDS TO 40 MILES AN HOUR ARE LIKELY. ISOLATED STRONG STORMS WERE OVER THE SOUTH CENTRAL COUNTIES NEAR OSCEOLA AND JUST NORTH OF LAMONI. BRIEF HEAVY RAINS AND WINDS TO 40 MILES AN HOUR ARE ALSO LIKELY WITH THESE STORMS. THE STORMS WERE MOVING EAST AT 20 MILES AN HOUR. ALSO...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED OVER THE EASTERN THIRD OF THE STATE. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. KS
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; the sounding from the Mesonet's radiosonde archive.