Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 184, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 29, 1990, 5:40 PM CDT for Adair County, Guthrie County, Iowa. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1990, 5:40 PM CDT (22:40 UTC)
- Expired
- Aug 29, 1990, 6:30 PM CDT
- In force
- 50 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Adair County, IA, Guthrie 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, 10.7 hours before the alert went out and 158 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
- 3599 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What 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 29, 3:47 PM CDT, 1 hour 53 minutes before
IAZ011-292120 SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE DES MOINES IA 343 PM CDT WED AUG 29 1990 ...STRONG THUNDERSTORMS ARE APPROACHING IOWA CITY... AT 340 PM...RADAR INDICATED STRONG THUNDERSTORMS APPROACHING IOWA CITY. THESE STORMS WILL BE MOVING THROUGH THE CITY BETWEEN 345 PM AND 415 PM. HEAVY RAINS...DEADLY LIGHTNING AND WINDS TO 50 MILES AN HOUR CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS. AT 330 PHM...WINDS TO 50 MILES AN HOUR OCCURRED AT CEDAR RAPIDS. WEINBRECHT
Special weather statement, Aug 29, 3:48 PM CDT, 1 hour 52 minutes before
IAZ009-292150 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 343 PM CDT WED AUG 29 1990 AT 331 PM...VERY STRONG THUNDERSTORMS WERE SCATTERED OVER CENTRAL AND EAST CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED 25 MILES NORTHEAST OF DES MOINES...BETWEEN NEVADA AND NEWTON...JUST EAST OF SAYLORVILLE RESERVOIR...AND NEAR MADRID...25 MILES NORTHWEST OF DES MOINES...AND NEAR CEDAR RAPIDS. THESE STORMS ARE LIKELY TO PRODUCE HEAVY RAIN...WIND GUSTING TO 50 MILES AN HOUR...DANGEROUS LIGHTNING...AND POSSIBLY SMALL HAIL. THE STORM NEAR CEDAR RAPIDS HAD WINDS REPORTED UP TO 50 MILES AN HOUR AND SHOULD APPROACH THE IOWA CITY AREA BY 4 PM. OTHER STRONG STORMS WERKE LOCATED NEAR JEFFERSON...45 MILES NORTHWEST OF DES MOINES. THE STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. DM
Special weather statement, Aug 29, 4:12 PM CDT, 1 hour 28 minutes before
IAZ009-292220 SPECIAL WEATHER STATEMENT AND WEATHER UPDATE NATIONAL WEATHER SERVICE DES MOINES IA 410 PM CDT WED AUG 29 1990 AT 400 PM...VERY STRONG THUNDERSTORMS WERE SCATTERED OVER CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN A 10 MILE WIDE BAND THAT EXTENDED FROM NEAR LAKE CITY...60 MILES NORTHWEST OF DES MOINES...TO JUST SOUTH OF NEWTON...30 MILES EAST OF DES MOINES. THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...WIND GUSTING TO 45 MILES AN HOUR...DANGEROUS LIGHTNING...AND POSSIBLY SMALL HAIL. OTHER STRONG STORMS WERE LOCATED WITHIN A 25 MILE RADIUS OF CEDAR RAPIDS. THE STORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. THE ONE TO TWO HOUR OUTLOOK IS FOR THESE STORMS wTO CONTINUE OVER CENTRAL IOWA AND MOVE INTO ADJACENT AREAS OF SOUTH CENTRAL AND SOUTHEAST IOWA. DM
Special weather statement, Aug 29, 4:46 PM CDT, 54 minutes before
IAZ009-292250 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 445 PM CDT WED AUG 29 1990 AT 433 PM...VERY STRONG AND INTENSE THUNDERSTORMS WERE SCATTERED OVER WEST CENTRAL...CENTRAL...AND SOUTHEAST IOWA. THE STRONGEST STORMS WERE IN A 10 TO 15 MILE WIDE BAND THAT EXTENDED FROM 5 MILES WEST OF CARROLL ...OR 65 MILES NORTHEAST OF COUNCIL BLUFFS...TO 5 MILES NORTH OF DES MOINES...TO THE PELLA VICINITY...40 MILES SOUTHEAST OF DES MOINES. THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...WIND GUSTING TO NEAR 50 MILES AN HOUR...DANGEROUS LIGHTNING...AND POSSIBLY SMALL HAIL. OTHER THUNDERSTORMS AND SHOWERS WERE NORTH OF AN OTTUMWA TO DAVENPORT LINE AND INCLUDED THE CEDAR RAPIDS AREA. IN ADDITION...A FEW SHOWERS HAD DEVELOPED NEAR MASON CITY. THE STORMS AND SHOWERS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. DM
Special weather statement, Aug 29, 4:53 PM CDT, 47 minutes before
IAZ010-292300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 455 AM CDT MON AUG 27 1990 STRONG THUNDERSTORMS WERE MOVING THROUGH THE DES MOINES METRO AREA LATE THIS AFTERNOON. INTENSE RAINFALL...WIND GUSTS TO 45 MILES AN HOUR AND PEA TO MARBLE-SIZED HAIL ARE LIKELY UNTIL 6 PM. THE THUNDERSTORMS SHOULD CONTINUE TO MOVE SOUTHWARD INTO THE SOUTHERN THIRD OF THE STATE...WITH A GROWING THREAT OF SEVERE WEATHER PRODUCTION. PEOPLE IN THIS PART OF THE STATE SHOULD STAY TUNED TO THE LATEST WEATHER INFORMATION. MYERS
Special weather statement, Aug 29, 5:18 PM CDT, 22 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 12:04 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 26 min |
| Aug 29, 12:20 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion | 40 min |
| Aug 29, 12:39 AM CDT | Severe Thunderstorm Warning | DMX | Wapello | 51 min |
| Aug 29, 12:53 AM CDT | Severe Thunderstorm Warning | DMX | Jefferson | 52 min |
| Aug 29, 12:57 AM CDT | Tornado Warning | DMX | Mahaska, Wapello | 48 min |
| Aug 29, 1:11 AM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 49 min |
| Aug 29, 1:18 AM CDT | Tornado Warning | DMX | Wapello | 42 min |
| Aug 29, 1:42 AM CDT | Tornado Warning | DMX | Davis, Van Buren | 48 min |
| Aug 29, 1:37 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 23 min |
| Aug 29, 5:00 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Wapello | 45 min |
| Aug 29, 5:13 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 47 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.