Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 158, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 18, 1990, 4:29 PM CDT for Audubon County, Iowa. It was in force for 31 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1990, 4:29 PM CDT (21:29 UTC)
- Expired
- Jul 18, 1990, 5:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Audubon 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 12:00Z, 9.5 hours before the alert went out and 128 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
- 17 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 138 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 182131
SVRDSM
IAC009-182200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
429 PM CDT WED JUL 18 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST CENTRAL IOWA
...AUDUBON
AT 428 PM...WEATHER RADAR INDICATED A SEVERE THUNDERSTORM OVER
SOUTHERN AUDUBON COUNTY NEAR BRAYTON...OR SOME 60 MILES NORTHEAST OF
COUNCIL BLUFFS.
THE STORM WAS DRIFTING NORTH AT 10 MILES AN HOUR...AND WILL BE
AFFECTING THE CITIES OF EXIRA...BRAYTON...HAMLIN...AND AUDUBON.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
S*TRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
FERRY/TRUETTWhat 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 18, 10:49 AM CDT, 5 hours 40 minutes before
IAZALL-181630- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1045 AM CDT WED JUL 18 1990 AT 1035 AM...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS WERE NOW ACROSS THE NORTHEAST HALF OF IOWA...NORTHEAST OF A SIOUX CITY/DES MOINES/OTTUMWA LINE. THE STRONGEST STORMS WERE IN THE CENTRAL AND EAST CENTRAL COUNTIES NEAR BOONE...STORY CITY...NEW SHARON AND WILLIAMSBURG. AT THIS TIME...LITTLE MORE THAN BRIEF hHEAVY RAINS AND WINDS OF 30 TO 40 MILES AN HOUR ARE EXPECTED. ALSO...ISOLATED THUNDERSTORMS WERE DEVELOPING ACROSS THE NORTHERN SECTIONS OF THE DES MOINES AREA. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. KS
Special weather statement, Jul 18, 11:44 AM CDT, 4 hours 45 minutes before
IAZALL-181730- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1140 AM CDT WED JUL 18 1990 AT 1135 AM...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS WERE OVER THE EASTERN HALF OF IOWA...ALONG AND EAST OF A MASON CITY... DES MOINES...LAMONI LINE. THE STRONGEST STORMS WERE IN THE CENTRAL AND EAST CENTRAL COUNTIES BETWEEN NEWTON AND TAMA/TOLEDO...OR FROM 40 TO 60 MILES EAST OF DES MOINES. THESE STORMS MAY PRODUCE BRIEF HEAVY RAINS...WINDS OF 30 TO 40 MILES AN HOUR...AND POSSIBLY SOME SMALL HAIL. IN ADDITION...SCATTERED THUNDERSTORMS CONTINUED OVER THE EXTREME NORTHWEST COUNTIES...BETWEEN SPENCER AND SIOUX FALLS. ONE OF THESE STORMS PRODUCED 5 MINUTES OF MARBLE SIZED HAIL ABOUT 25 MILES WEST OF SPENCER NEAR SANBORN BETWEEN 1110 AND 1120 AM THIS MORNING. ALSO...MARBLE SIZED HAIL COMPLETELY COVERED THE GROUND JUST WEST OF SANBORN. ALL OF THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. KS/TRUETT
Special weather statement, Jul 18, 12:19 PM CDT, 4 hours 10 minutes before
IAZALL-181830- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 1215 PM CDT WED JUL 18 1990 AT 1210 PM...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS WERE OVER THE EASTERN HALF OF IOWA...ALONG OR EAST OF A MASON CITY/DES MOINES /LAMONI LINE. THE STRONGEST STORMS WERE IN THE SOUTH CENTRAL...SOUTHEAST AND EAST CENTRAL COUNTIES...BETWEEN RED ROCK LAKE AND RATHBUN LAKE...JUST EAST OF OTTUMWA AND NEAR CEDAR RAPIDS. THE STORMS WERE PRODUCING HEAVY RAINS AND WINDS OF 30 TO 40 MILES AN HOUR. IN ADDITION...SCATTERED THUNDERSTORMS CONTINUED OVER THE EXTREME NORTHWEST COUNTIES...BETWEEN SPENCER AND SIOUX FALLS. ALONG WITH THE HEAVY RAINS...HAIL IS LIKELY WITH THESE STORMS. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. KS
Special weather statement, Jul 18, 12:44 PM CDT, 3 hours 45 minutes before
IAZALL-181830- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1245 PM CDT WED JUL 18 1990 AT 1235 PM...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUED OVER THE EASTERN SECTIONS OF IOWA...ALONG AND EAST OF A DECORAH...WATERLOO...DES MOINES...LAMONI LINE. THE GREATEST CONCENTRATION OF STORMS WAS OVER THE SOUTH CENTRAL AND SOUTHEAST COUNTIES BETWEEN OSCEOLA AND FAIRFIELD...OR FROM 50 MILES WEST OF OTTUMWA TO ABOUT 25 MILES EAST OF OTTUMWA. THESE STORMS WILL PRODUCE BRIEF HEAVY RAINS...AND MAY POSSIBLY PRODUCE WINDS OF 30 TO 40 MILES AN HOUR. SCATTERED THUNDERSTORMS ALSO REMAINED OVER THE NORTHWEST COUNTIES... BETWEEN SPENCER AND SIOUX FALLS. HEAVY RAINS...AND SOME HAIL...IS ALSO LIKELY WITH THESE STORMS. ALL OF THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. KS/TRUETT
Special weather statement, Jul 18, 1:14 PM CDT, 3 hours 15 minutes before
IAZALL-181900- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 115 PM CDT WED JUL 18 1990 AT 110 PM...SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER THE SOUTHEAST THIRD OF IOWA...AS WELL AS OVER THE EXTREME NORTHWEST COUNTIES. IN SOUTHEAST IOWA...THE SHOWERS AND STORMS WERE GENERALLY ALONG AND SOUTH OF A DUBUQUE...CEDAR RAPIDS...LAMONI LINE. THE STRONG STORMS WERE OVER THE SOUTH CENTRAL AND SOUTHEAST COUNTIES...IN A NARROW BAND FROM OSCEOLA...THROUGH OTTUMWA...TO NEAR THE QUAD CITIES. OVER NORTHWEST IOWA...THE THUNDERSTORMS LINGERED BETWEEN SPENCER AND SIOUX FALLS. HEAVY RAINS ARE LIKELY WITH THESE STORMS...AS WELL AS SOME HAIL. THE SHO9WERS AND STORMS WERE MOVING EAST-SOUTHEAST AT 30 MILES AN HOUR. < KS/TRUETT
Special weather statement, Jul 18, 1:39 PM CDT, 2 hours 50 minutes before
IAZALL-181930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 140 PM CDT WED JUL 18 1990 AT 135 PM...SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER THE SOUTHEAST THIRD OF IOWA...AS WELL AS OVER THE EXTREME NORTHWEST IOWA. IN SOUTHEAST IOWA...THE SHOWERS AND STORMS WERE GENERALLY ALONG AND SOUTH OF A DUBUQUE...CEDAR RAPIDS...LAMONI LINE. THE STRONG STORMS WERE OVER THE EXTREME SOUTH CENTRAL AND SOUTHEAST COUNTIES...IN A NARROW BAND FROM JUST NORTH OF LAMONI...TO JUST SOUTH OF OTTUMWA... TO NEAR THE QUAD CITIES. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. OVER NORTHWEST IOWA...THE THUNDERSTORMS WERE ROUGHLY ALONG AND WEST OF A SKPENCER...SIOUX CITY LINE. THE STRONGEST STORM WAS 15 MILES SOUTH OF SPENCER. < THE STORMS OVER NORTHWEST IOWA WERE MOVING EAST AT 30 MILES AN HOUR. KS/TRUETT
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.