Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 116, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 28, 1990, 1:12 AM CDT for Clay County, Iowa. It was in force for 63 min. 1 report 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 28, 1990, 1:12 AM CDT (06:12 UTC)
- Expired
- Jun 28, 1990, 2:15 AM CDT
- In force
- 63 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Clay 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 28, 1:25 AM CDT | Hail 1 | Clay, 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 00:00Z, 6.2 hours before the alert went out and 220 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
- 3614 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 202 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 280612
SVRDSM
IAC041-280715-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
112 AM CDT THU JUN 28 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 215 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTHWEST PART OF IOWA
CLAY
AT 105 AM CDT A SEVERE THUNDERSTORM WAS MOVING INTO WESTERN CLAY
COUNTY NEAR EVERLY...ABOUT 10 WEST OF SPENCER.
THESE STORMS HAVE PRODUCED ONE-INCH HAIL AND WINDS IN EXCESS OF
60 MILES AN HOUR.
CITIES INCLUDED IN THE WARNING ARE EVERLY...SPENCER...ROYAL...
AND PETERSON.
REMEMBER...SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MILES
AN HOUR...LARGE HAIL...DANGEROUS LIGHTNING...AND VERY HEAVY RAINS.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOU HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
FORSTER/HUTTON[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, Jun 27, 11:18 PM CDT, 1 hour 54 minutes before
IAZALL-280530- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE NATIONAL WEATHER SERVICE DES MOINES IOWA 1117 PM CDT WED JUN 27 1990 AT 1110 PM...THE THUNDERSTORMS THAT HAD BEEN IN LYON AND SIOUX COUNTY OF NORTHWEST IOWA HAD ALL BUT DISSIPATED. HOWEVER...A VERY SEVERE THUNDERSTORM PRODUCING BASEBALL SIZE HAIL AND FUNNEL CLOUDS WAS IN EXTREME SOUTHEAST SOUTH DAKOTA. THIS STORM WILL LIKELY MOVE INTO LYON COUNTY SHORTLY AFTER 1130PM. OTHER SHOWERS AND THUNDERSTORMS WERE IN THE NORTHEAST PART OF THE STATE. THE PRECIPITATION WAS MAINLY FROM DECORAH TO CENTRAL ALLAMAKEE COUNTY... OR ABOUT 65 MILES NORTHWEST OF DUBUQUE. THE SHOWERS AND THUNDERSTORMS IN THE NORTHEAST WERE MOVING MAINLY EAST AT ABOUT 25 MILES AN HOUR...WHILE THE STORMS TO THE NORTHWEST OF THE STATE WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. HUTTON
Special weather statement, Jun 27, 11:44 PM CDT, 1 hour 28 minutes before
IAZALL-280600- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 1142 PM CDT WED JUN 27 1990 AT 1129 PM...AN INTENSE THUNDERSTORM WAS ON THE IOWA/SOUTH DAKOTA BORDER MOVING INTO WESTERN LYON COUNTY OF FAR NORTHWEST IOWA. THIS STORM PRODUCED 1 INCH DIAMETER HAIL ALONG WITH 71 MILE AN HOUR WIND AS IT PASSED THROUGH THE SIOUX FALLS SOUTH DAKOTA AIRPORT. BRIEF...VERY HEAVY RAIN...LARGE HAIL AND DAMAGING WIND CAN BE EXPECTED IN WESTERN LYON COUNTY THROUGH MIDNIGHT...AND POSSIBLY INTO THE ROCK VALLEY AREA BY 1220 AM. OTHERWISE...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED IN THE FAR NORTHEAST COUNTIES OF THE STATE. THE PRECIPITATION EXTENDED FROM 25 MILES NORTHWEST OF DUBUQUE...TO 50 MILES NORTHEAST OF MASON CITY. THE SHOWERS AND THUNDERSTORMS IN THE NORTHEAST WERE MOVING EAST AT 25 MILES AN HOUR...WHILE THE STORMS IN THE FAR NORTHWEST WERE MOVING SOUTHEAST AT ABOUT 35 MILES AN HOUR. HUTTON
Local storm report, Jun 27, 11:49 PM CDT, 1 hour 23 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WATERLOO IA
1149 PM CDT WED JUN 27 1990
...SEVERE WEATHER REPORTS FOR JUNE 27 1990...
TIME OF OCCURRENCE IN CDT EVENT AND LOCATION
240 PM MITCHELL CO... GOLF BALL SIZE HAIL IN OSAGE WITH BROKEN WINDOWS
AND A DOWNED TREE.
240 PM BUTLER CO... 45 TO 50 MPH WINDS NEAR CLARKSVILLE.
314 PM BREMER CO... UNCONFIRMED FUNNEL CLOUD SPOTTED SOUTH OF
TRIPOLI.
327 PM BREMER CO... TRIPOLI FIRE DEPT. RECEIVED AN UNCONFIRMED
REPORT OF A FUNNEL CLOUD
421 PM BLACK HAWK CO... 40 TO 50 MPH WINDS AND 3/4 INCH HAIL AT
GILBERTVILLE.
430 PM BLACK HAWK CO... 3/4 INCH HAIL AT RAYMOND.
430 PM BREMER CO... LARGE TREES AND POWER LINES DOWN IN TRIPOLI
AND 2 TRAILER HOMES DESTROYED AT THE
TRIPOLI TRAILER COURT.
430 PM BLACK HAWK CO... UNCONFIRMED FUNNEL CLOUD SPOTTED FROM A
TRAILER SOUTH OF WATERLOO ON ELK RUN ROAD.
GOLF BALL SIZE HAIL EAST OF WATERLOO AND
NEAR IBP PLANT EAST OF WATERLOO.
440 PM BLACK HAWK CO... WATER OVER SOME ROADS IN DUNKERTON.
445 PM BLACK HAWK CO... UNCONFIRMED REPORT OF A FUNNEL TOUCHDOWN
BETWEEN GILBERTVILLE AND ELK
RUN HEIGHTS.
503 PM BUCHANAN CO... OLD HIGHWAY 20 ROAD FLOODED.
COLLARSpecial weather statement, Jun 28, 12:17 AM CDT, 55 minutes before
IAZALL-280630- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 1215 AM CDT THU JUN 28 1990 AT 1209 AM...AN INTENSE THUNDERSTORM WAS LOCATED VERY NEAR ROCK RAPIDS IN NORTHWEST IOWA...OR ABOUT 40 MILES NORTH OF SIOUX CITY. THIS STORM IS CAPABLE OF PRODUCING EXTREMELY HEAVY RAIN...LARGE AND DAMAGING HAIL ALONG WITH DAMAGING WIND IN EXCESS OF 65 MILES AN HOUR. THE STORM WILL LIKELY MOVE INTO THE SIOUX CENTER AND /HULL AREAS BY 1240AM. THE THUNDERSTORM WAS MOVING SOUTHEAST AT 35 MILES AN HOUR. HUTTON
Special weather statement, Jun 28, 12:22 AM CDT, 50 minutes before
IAZALL-280630- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED...1ST LINE NATIONAL WEATHER SERVICE DES MOINES IOWA 1215 AM CDT THU JUN 28 1990 AT 1209 AM...AN INTENSE THUNDERSTORM WAS LOCATED VERY NEAR ROCK VALLEY IN NORTHWEST IOWA...OR ABOUT 40 MILES NORTH OF SIOUX CITY. THIS STORM IS CAPABLE OF PRODUCING EXTREMELY HEAVY RAIN...LARGE AND DAMAGING HAIL ALONG WITH DAMAGING WIND IN EXCESS OF 65 MILES AN HOUR. THE STORM WILL LIKELY MOVE3 INTO THE SIOUX CENTER AND HULL AREAS BY 1240AM. THE THUNDERSTORM WAS MOVING SOUTHEAST AT 35 MILES AN HOUR. ...CORRECTED...SHOULD BE ROCK VALLEY AND NOT ROCK RAPIDS... HUTTON
Special weather statement, Jun 28, 12:45 AM CDT, 27 minutes before
IAZALL-280700- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 1244 AM CDT THU JUN 28 1990 AT 1229 AM...AN INTENSE THUNDERSTORM WAS LOCATED ACROSS CENTRAL SIOUX COUNTY...NEAR HULL AND SIOUX CENTER OR ABOUT 35 MILES NORTH OF SIOUX CITY. THESE STORMS ARE CAPABLE OF PRODUCING EXTREMELY HEAVY RAIN... LARGE AND DAMAGING HAIL AND DAMAGING WIND IN EXCESS OF 65 MILES AN HOUR. IN ADDITION...NEARLY CONTINUOUS LIGHTNING HAS BEEN REPORTED. THIS CELL IS LIKELY TO MOVE INTO NORTHWEST CHEROKEE COUNTY BY 120 AM. OTHER SHOWERS AND THUNDERSTORMS WERE NEAR ESTHERVILLE AND NEAR SIBLEY... ALL IN FAR NORTHWESTERN IOWA. SHOWERS AND THUNDERSTORMS WERE ALSO INDICATED IN FAR NORTHEAST IOWA. THE PRECIPITATION EXTENDED FROM 20 MILES NORTHWEST OF DUBUQUE...TO NEAR DECORAH...OR ABOUT 55 MILES EAST OF MASON CITY. THE SHOWERS AND THUNDERSTORMS IN THE NORTHEAST WERE MOVING EAST AT 25 MILES AN HOUR...WHILE THE STORMS IN THDE NORTHWEST WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. HUTTON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 1:37 AM CDT | Severe Thunderstorm Warning | DMX | Buena Vista | 68 min |
| Jun 28, 1:53 AM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 67 min |
| Jun 28, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 64 min |
| Jun 28, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 64 min |
| Jun 28, 2:24 AM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 66 min |
| Jun 28, 2:52 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 68 min |
| Jun 28, 4:23 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 52 min |
| Jun 28, 5:10 AM CDT | Severe Thunderstorm Warning | DMX | Dallas | 35 min |
| Jun 28, 7:06 AM CDT | Severe Thunderstorm Warning | DMX | Monroe | 32 min |
| Jun 28, 10:32 AM CDT | Severe Thunderstorm Warning | DMX | Emmet | 43 min |
| Jun 28, 11:02 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 43 min |
| Jun 28, 11:40 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Winnebago | 50 min |
| Jun 28, 11:43 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 32 min |
| Jun 28, 12:15 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 30 min |
| Jun 28, 12:24 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin | 51 min |
| Jun 28, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 51 min |
| Jun 28, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 26 min |
| Jun 28, 1:09 PM CDT | Tornado Warning | DMX | Hardin | 36 min |
| Jun 28, 1:26 PM CDT | Severe Thunderstorm Warning | DMX | Grundy | 54 min |
| Jun 28, 1:42 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 48 min |
| Jun 28, 1:44 PM CDT | Tornado Warning | DMX | Hardin | 31 min |
| Jun 28, 1:56 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Tama | 30 min |
| Jun 28, 2:13 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 47 min |
| Jun 28, 2:23 PM CDT | Tornado Warning | DMX | Poweshiek, Tama | 37 min |
| Jun 28, 2:51 PM CDT | Tornado Warning | DMX | Iowa | 39 min |
| Jun 28, 2:51 PM CDT | Tornado Warning | DMX | Benton | 23 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.