Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 59, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 1990, 8:45 PM CDT for Chickasaw County, Iowa. It was in force for 60 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 12, 1990, 8:45 PM CDT (01:45 UTC)
- Expired
- Jun 12, 1990, 9:45 PM CDT
- In force
- 60 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Chickasaw 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 12, 9:44 PM CDT | Thunderstorm Wind 50 | Chickasaw, 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
Minneapolis, MN (KSTC), launched 00:00Z, 1.8 hours before the alert went out and 224 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
- 1326 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1196 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- -50 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- -0.4
- Supercell composite
- -2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KALO 130145
SVRALO
IAC037-130245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WATERLOO IA
845 PM CDT TUE JUN 12 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTHEAST PART OF IOWA
CHICKASAW
AT 848 PM CDT WEATHER RADAR AT WATERLOO WAS SHOWING A SEVERE
THUNDERSTORM MOVING INTO SOUTHERN CHICKASAW COUNTY. THIS STORM
IS MOVING NORTHEAST AT 40 MILES AN HOUR AND WILL PRODUCE WINDS IN
EXCESS OF 60 MILES AN HOUR...LARGE HAIL...EXTENSIVE LIGHTNING AND
VERY HEAVY RAIN. THIS STORM WILL AFFECT NASHUA AND NEW HAMPTON.
YOU SHOULD MOVE INSIDE A REINFORCED BUILDING. STAY AWAY FROM
WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNTIL
AFTER THE STORM PASSES.
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.
TAKE COVER THIS IS A SEVERE STORM. I REPEAT THIS IS A SEVERE
STORM TAKE COVER.
ROBBWhat 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 12, 7:08 PM CDT, 1 hour 37 minutes before
IAZALL-130100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 705 PM CDT TUE JUN 12 1990 ...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF IOWA UNTIL 10 PM THIS TUESDAY EVENING... ...A TORNADO WATCH IS IN EFFECT THIS TUESDAY EVENING AND WEDNESDAY MORNING FOR PORTIONS OF WESTERN AND NORTHERN IOWA... AT 700 PM CDT...A SMALL AREA OF INTENSE THUNDERSTORMS WAS LOCATED OVER NORTH CENTRAL IOWA...IN A 15 MILE WIDE AREA...BETWEEN SHEFFIELD AND WEBSTER CITY...OR FROM 15 MILES SOUTH OF MASON CITY TO 55 MILES SOUTHWEST OF MASON CITY. THESE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. THESE INTENSE STORMS HAVE BEEN PRODUCING VERY LARGE AMOUNTS OF RAIN...FREREQUENT DANGEROUS LIGHTNING...AND COULD ALSO PRODUCE BRIEF STRONG GUSTY WIND AND HAIL. WPM/KAS
Special weather statement, Jun 12, 7:23 PM CDT, 1 hour 22 minutes before
IA002-003-007-130200 SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 715 PM CDT TUE JUN 12 1990 ...TORNADO WATCH FOR NORTHEAST IOWA UNTIL 1000 PM CDT... AT 715 PM CDT SHOWERS AND THUNDERSTORMS WERE OCCURRING IN A 45 MILES WIDE BAND FROM FORT DODGE WEST OF I35 TO ABOUT 10 MILES SOUTHEAST OF MASON CITY. THIS AREA OF THUNDERSTORMS WAS PRODUCING BRIEF HEAVY RAIN...SOME SMALL HAIL POSSIBLE AT TIMES AND WIND GUST TO AROUND 30 TO 40 MILES AN HOUR. THE STORMS WERE MOVE NORTHEAST AT 35 MILES AN HOUR. THE REMAINDER OF NORTHEAST IOWA HAD VARIABLE CLOUDS WITH SOME SUNSHINE FROM MASON CITY TO WATERLOO TO OELWEIN TO THE DECORAH AREA. THE TEMPERATURES WERE IN THE 70S AND 80S WITH SOUTH WINDS 10 TO 25 MILES AN HOUR. THE AREA OF SHOWERS AND THUNDERSTORMS WILL BE MOVING INTO THE MASON CITY/ROCKFORD/ CHARLES CITY AND HAMPTON AREAS BY 810 PM. STORMS COULD DEVELOP ANYWHERE IN NORTHEAST IOWA WITH STEADY WINDS AND TEMPERATURES.
Special weather statement, Jun 12, 7:47 PM CDT, 58 minutes before
IAZALL-130230- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 745 PM CDT TUE JUN 12 1990 ...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF IOWA UNTIL 10 PM THIS TUESDAY EVENING... ...A TORNADO WATCH IS IN EFFECT FOR WESTERN AND NORTHERN IOWA UNTIL 1 AM WEDNESDAY MORNING... AT 733 PM...ISOLATED INTENSE THUNDERSTORMS WERE OVER NORTH CENTRAL IOWA...25 MILES EAST AND 40 MILES SOUTH OF MASON CITY. THE STORMS WERE IN THE NORA SPRINGS...CLARION AND IOWA FALLS AREAS. IN ADDITION TO THE EXCESSIVE RAINS...BRIEF STRONG WINDS AND HAIL ARE MOST LIKELY OCCURRING WITH THESE STORMS. THE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR AND WILL BE IN THE DOWS...ROWAN...HAMPTON AND OSAGE AREAS BY 815 PM. KS/WPM
Local storm report, Jun 12, 7:55 PM CDT, 50 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
752 PM CDT TUE JUN 12 1990
...ALL TIME IN CDT...
TIME EVENT
320 PM TORNADO 3 MILE WEST OF ANITA/CASS COUNTY/
330 PM TORNADO AT MASSENA /CASS COUNTY/
355 PM TREES DOWN AND POWER LINES DOWN IN THE VICINITY OF
BRIDGEWATER /ADAIR COUNTY/
505-515 PM 50 MPH WIND GUSTS BETWEEN RHODES AND MELBOURNE/MARSHALL
COUNTY/
510 PM 6-8 INCH DIAMETER TREE LIMBS DOWN AND TOP OF RADIO TOWER
BENT.
515 PM 56 MPH WIND REPORTED AT MARSHALLTOWN/MARSHALL COUNTY/
740 PM TORNADO JUST SOUTH OF DOWS IN EXTREME SOUTHEAST WRIGHT
COUNTY.
JMSpecial weather statement, Jun 12, 8:05 PM CDT, 40 minutes before
IAZALL-130230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 805 PM CDT TUE JUN 12 1990 ...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF IOWA UNTIL 10 PM TONIGHT... ...A TORNADO WATCH IS IN EFFECT FOR WESTERN AND NORTHERN IOWA UNTIL 1 AM WEDNESDAY MORNING... AT 800 PM...ISOLATED INTENSE THUNDERSTORMS WERE OVER NORTH CENTRAL IOWA...25 MILES SOUTH OF MASON CITY NEAR HAMPTON. IN ADDITION TO THE EXCESSIVE RAINS...BRIEF STRONG WINDS AND HAIL ARE MOST LIKELY OCCURRING WITH THESE STORMS. THE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR...MOVING BETWEEN SHEFFIELD AND DUMONT AND INTO THE MARBLE ROCK AREA BY 900 PM. / ALSO...SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER THE NORTH CENTRAL AND NORTHEAST COUNTIES...NORTH OF A FORT DODGE/WATERLOO LINE. KS/WPM
Special weather statement, Jun 12, 8:42 PM CDT, 3 minutes before
IAZALL-130300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 840 PM CDT TUE JUN 12 1990 ...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF IOWA UNTIL 10 PM TONIGHT... ...A TORNADO WATCH IS IN EFFECT FOR WESTERN AND NORTHERN IOWA UNTIL 1 AM WEDNESDAY MORNING... AT 829 PM...ISOLATED INTENSE THUNDERSTORMS WERE OVER NORTH CENTRAL AND NORTHEAST IOWA...FROM 10 TO 35 MILES SOUTHEAST OF MASON CITY. THE STORMS WERE NEAR THE TOWNS OF SHEFFIELD...GREENE AND CLARKSVILLE. IN ADDITION TO THE EXCESSIVE RAINS...BRIEF STRONG WINDS AND LARGE HAIL ARE MOST LIKELY OCCURRING WITH THESE STORMS. THE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR AND WILL MOVE INTO THE ROCKFORD...MARBLE ROCK AND NASHUA AREAS BETWEEN 9 - 930 PM. / ALSO...SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER THE NORTH CENTRAL AND NORTHEAST COUNTIES...NORTH OF A FORT DODGE/WATERLOO LINE. KS/WPM
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:16 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 13 min |
| Jun 12, 7:16 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 44 min |
| Jun 12, 7:26 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 44 min |
| Jun 12, 7:36 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell | 69 min |
| Jun 12, 8:10 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Floyd, Franklin | 35 min |
| Jun 12, 9:23 PM CDT | Tornado Warning | DMX | Floyd | 37 min |
| Jun 12, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Winneshiek | 56 min |
| Jun 12, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Fayette | 41 min |
| Jun 12, 9:57 PM CDT | Severe Thunderstorm Warning | DMX | Dickinson | 28 min |
| Jun 12, 10:03 PM CDT | Severe Thunderstorm Warning | DMX | Howard | 57 min |
| Jun 12, 10:03 PM CDT | Severe Thunderstorm Warning | DMX | Chickasaw | 27 min |
| Jun 12, 10:20 PM CDT | Severe Thunderstorm Warning | DMX | Allamakee | 40 min |
| Jun 12, 10:47 PM CDT | Severe Thunderstorm Warning | DMX | Winneshiek | 43 min |
| Jun 13, 2:28 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene, Guthrie | 32 min |
| Jun 13, 6:44 PM CDT | Tornado Warning | DMX | Cass | 18 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.