Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 157, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 9, 1990, 8:14 PM CDT for Jefferson County, Wapello County, Iowa. It was in force for 61 min.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1990, 8:14 PM CDT (01:14 UTC)
- Expired
- Jul 9, 1990, 9:15 PM CDT
- In force
- 61 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Jefferson County, IA, Wapello 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, 1.2 hours before the alert went out and 352 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
- 3634 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 246 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 100116
SVRDSM
IAC101-179-100215-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
814 PM CDT MON JUL 9 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 915 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST IOWA
...JEFFERSON...WAPELLO
AT 810 PM...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
INTENSE THUNDERSTORMS IN SOUTHEAST IOWA....ABOUT 5 TO 15 MILES SOUTH
AND SOUTHWEST OF OTTUMWA...OR 75 MILES SOUTHEAST OF DES MOINES.
THIS STORM WAS MOVING NORTHEAST AT ABOUT 35 MILES AN HOUR.
A MEMBER OF THE PUBLIC REPORTED A FUNNEL CLOUD SOUTH OF OTTUMWA AT 803
PM...BUT THIS APPEARS TO BE THE RESULT OF CLOUDS PUSHING OUT AHEAD OF
THE THUNDERSTORM...THAT USUALLY APPEAR MENACING. THIS IS A DANGEROUS
STORM...BUT DOES NOT APPEAR TO BE TORNADIC.
THIS WARNING INCLUDES THE CITIES OF OTTUMWA AND FAIRFIELD...AS WELL AS
AGENCY...ELDON...BATAVIA...LIBERTYVILLE...AND LOCKRIDGE.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE BTHUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
DOWD/HUTTON/AWhat 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 9, 6:18 PM CDT, 1 hour 56 minutes before
IAZALL-100000- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 615 PM CDT MON JUL 9 1990 AT 605 PM...SCATTERED INTENSE THUNDERSTORMS WERE OCCURRING OVER SOUTH CENTRAL AND SOUTHWEST IOWA. THE STRONGEST STORMS WERE LOCATED OVER WESTERN RINGGOLD COUNTY AND WESTERN DECATUR COUNTY...NEAR MOUNT AYR AND DIAGONAL...AND 15 MILES NORTH OF LEON. THESE COMMUNITIES ARE 50 TO 60 MILES SOUTH AND SOUTHWEST OF DES MOINES. THESE STORMS ARE CAPABLE OF PRODUCING HEAVY RAINS...LARGE HAIL...WIND UP TO 50 MILES AN HOUR...AND DANGEROUS LIGHTNING. TORNADOES ARE ALSO POSSIBLE WITH THESE EXTREMELY STRONG STORMS. THESE STORMS WERE MOVING NORTH AT 10 TO 15 MILES AN HOUR AND PERSONS IN THE PATH OF THESE STORMS SHOULD MONITOR WEATHER REPORTS AND SEEK IMMEDIATE SHELTER. ALSO...WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER WEST CENTRAL ...NORTH CENTRAL...CENTRAL...AND SOUTHEAST IOWA. THESE SHOWERS WERE GENERALLY SOUTH OF A SIOUX CITY TO WATERLOO LINE AND WERE MOVING EAST AT 30 MILES AN HOUR. DM
Special weather statement, Jul 9, 6:49 PM CDT, 1 hour 25 minutes before
IAZALL-100035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 647 PM CDT MON JUL 9 1990 AT 631 PM...INTENSE THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL AND SOUTHWEST IOWA. THE STRONGEST STORMS WERE LOCATED IN DECATUR COUNTY... FROM THE LAMONI AREA TO 10 MILES NORTH AND NORTHEAST OF LEON...50 MILES SOUTH OF DES MOINES. CONFIRMED FUNNEL CLOUDS WERE REPORTED NEAR THE TOWN OF KELLERON IN EXTREME EASTERN RINGGOLD COUNTY...60 MILES SOUTH SOUTHWEST OF DES MOINES. THESE STORMS ARE CAPABLE OF PRODUCING HEAVY RAINS...LARGE HAIL...WIND OVER 50 MILES AN HOUR...AND DANGEROUS LIGHTNING. TORNADOES ARE ALSO POSSIBLE WITH THESE STORMS. PERSONS IN THE PATH OF THESE STORMS ARE URGED TO SEEK IMMEDIATE SHELTER. THESE STORMS WERE MOVING NORTH AT 10 TO 15 MILES AN HOUR. ALSO...ISOLATED THUNDERSTORMS AND SHOWERS WERE OVER NORTHWEST AND NORTH CENTRAL IOWA...FROM EAST OF SIOUX CITY TO THE STORY CITY AREA. THESE STORMS ARE MOVING EAST AT 25 MILES AN HOUR. DM
Special weather statement, Jul 9, 7:02 PM CDT, 1 hour 12 minutes before
IAZALL-100035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED 1ST PAR. NATIONAL WEATHER SERVICE DES MOINES IA 702 PM CDT MON JUL 9 1990 AT 631 PM...INTENSE THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL AND SOUTHWEST IOWA. THE STRONGEST STORMS WERE LOCATED IN DECATUR COUNTY... FROM THE LAMONI AREA TO 10 MILES NORTH AND NORTHEAST OF LEON...50 MILES SOUTH OF DES MOINES. CONFIRMED FUNNEL CLOUDS WERE REPORTED NEAR THE TOWN OF KELLERON IN EXTREME EASTERN RINGGOLD COUNTY AROUND 610 PM...60 MILES SOUTH SOUTHWEST OF DES MOINES. THESE STORMS ARE CAPABLE OF PRODUCING HEAVY RAINS...LARGE HAIL...WIND OVER 50 MILES AN HOUR...AND DANGEROUS LIGHTNING. TORNADOES ARE ALSO POSSIBLE WITH THESE STORMS. PERSONS IN THE PATH OF THESE STORMS ARE URGED TO SEEK IMMEDIATE SHELTER. THESE STORMS WERE MOVING NORTH AT 10 TO 15 MILES AN HOUR. ALSO...ISOLATED THUNDERSTORMS AND SHOWERS WERE OVER NORTHWEST AND NORTH CENTRAL IOWA...FROM EAST OF SIOUX CITY TO THE STORY CITY AREA. THESE STORMS ARE MOVING EAST AT 25 MILES AN HOUR. DM
Special weather statement, Jul 9, 7:20 PM CDT, 54 minutes before
IAZALL-100135- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 715 PM CDT MON JUL 9 1990 AT 706 PM...ISOLATED INTENSE THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL IOWA. THE STORMS WERE LOCATED IN THE RATHBUN LAKE...CORYDON AND ALLERTON AREAS...ABOUT MIDWAY BETWEEN LAMONI AND OTTUMWA. ALONG WITH THE EXTREMELY HEAVY RAINS...WINDS OVER 50 MILES AN HOUR ARE LIKELY. THE STORMS WERE MOVING NORTHEAST AT 20 MILES AN HOUR AND WILL BE IN THE RATHBUN LAKE AND ALLERTON AREAS FOR THE NEXT HOUR. ALSO...SCATTERED SHOWERS AND STORMS EXTENDED FROM SOUTHWEST INTO SOUTHEAST IOWA...ALONG OR SOUTH OF AN OMAHA/COUNCIL BLUFFS...OTTUMWA LINE. THE TORNADO WARNING FOR PARTS OF RINGGOLD AND DECATUR COUNTIES HAD EXPIRED. AND -NO TORNADO WATCHES- ARE IN EFFECT AT THIS TIME. / KS
Special weather statement, Jul 9, 7:53 PM CDT, 21 minutes before
IAZALL-100200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 750 PM CDT MON JUL 9 1990 AT 735 PM...ISOLATED INTENSE THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL IOWA. THE STORMS WERE LOCATED FROM RATHBUN LAKE TO CENTERVILLE...ABOUT MIDWAY BETWEEN LAMONI AND OTTUMWA. ALONG WITH THE EXTREMELY HEAVY RAINS ...WINDS OVER 50 MILES AN HOUR ARE LIKELY. ALSO...SCATTERED SHOWERS AND STORMS WERE OVER THE SOUTHERN...CENTRAL AND NORTHWESTERN COUNTIES. THE STRONGEST OF THESE STORMS WAS IN THE SOUTH- WEST NEAR CRESTON. ALL PRECIPITATION IN THE STATE WAS WEST OF A MASON CITY/QUAD CITIES LINE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. K+S
Special weather statement, Jul 9, 8:14 PM CDT, 0 minutes before
IAZALL-100230- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 815 PM CDT MON JUL 9 1990 AT 803 PM...ISOLATED INTENSE THUNDERSTORMS WERE RAPIDLY DISSIPATING AND DEVELOPING OVER SOUTH CENTRAL AND SOUTHEAST IOWA. INTENSE THUNDERSTORMS WERE NOW OVER THE SOUTHEAST...DUE SOUTH OF OTTUMWA NEAR BLOOMFIELD AND TROY. ALONG WITH THE EXTREMELY HEAVY RAINS...WINDS OF 50 TO 60 MILES AN HOUR ARE LIKELY. ALSO...@SCATTERED SHOWERS AND STORMS WERE OVER ALL BUT THE FAR NORTHERN COUNTIES. THE GREATEST CONCENTRATION OF RAINFALL WAS FROM DES MOINES SOUTH TO THE MISSOURI BORDER. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. KS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 7:23 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 52 min |
| Jul 9, 7:51 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Van Buren | 54 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; the sounding from the Mesonet's radiosonde archive.