Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 64, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 1990, 10:03 PM CDT for Chickasaw County, Iowa. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1990, 10:03 PM CDT (03:03 UTC)
- Expired
- Jun 12, 1990, 10:30 PM CDT
- In force
- 27 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.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 3.1 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 130303
SVRALO
IAC037-089-130400-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WATERLOO IA
1003 PM CDT TUE JUN 12 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE NORTHEAST PART OF IOWA
CHICKASAW...SOUTHERN HOWARD
AT 955 PM CDT WATERLOO RADAR WAS SHOWING A SEVERE THUNDERSTORM
35 MILES NORTH OF WATERLOO NEAR IONIA. THIS STORM WILL PRODUCE
HIGH WINDS IN EXCESS OF 60 MPH...LARGE HAIL AND HEAVY RAIN. THIS
STORM WILL AFFECT THE NORTH WASHINGTON...CRESCO AND PROTIVIN AS
IT MOVE NORTHEAST AT 40 MILES AN HOUR.
SEVERE THUNDERSTORMS vCAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.
THIS IS A VERY DANGEROUS STORM AND PEOPLE SHOULD WATCH OUT FOR
INTENSE LIGHTNING.
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, 8:05 PM CDT, 1 hour 58 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, 1 hour 21 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
Special weather statement, Jun 12, 9:17 PM CDT, 46 minutes before
IAZALL-130330- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 916 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 908 PM...INTENSE THUNDERSTORMS CONTINUED IN PART OF NORTH CENTRAL AND NORTHEAST IOWA. THE STORMS EXTENDED FROM MASON CITY TO 25 MILES NORTH OF WATERLOO. HEAVY RAIN...STRONG WIND...LARGE HAIL AND DANGEROUS CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THE STROGEST STORMS. OTHER VERY HEAVY THUNDERSTORMS HAD DEVELOPED ACROSS NORTHWEST IOWA. THE STRONGEST STORM WAS LOCATED IN NORTHERN OBRIEN COUNTY...55 MILES NORTHEAST OF SIOUX CITY. THE STORMS IN THIS AREA COULD ALSO PRODUCE HEAVY RAIN...HAIL AND STRONG WIND. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. PERSONS IN THE SPIRIT LAKE AND ESTHERVILLE AREAS CAN EXPECT BSHOWERS AND THUNDERSTORMS BY 845 PM. THUNDERSTORMS WILL CONTINUE ACROSS THE EXTREME NORTH CENTRAL AND NORTHEAST PART OF THE STATE. JAH
Special weather statement, Jun 12, 9:29 PM CDT, 34 minutes before
IAZALL-130600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 930 PM CDT TUE JUN 12 1990 THE TORNADO WATCH NUMBER 247 IS NO LONGER IN EFFECT FOR THE FOLLOWING COUNTIES IN CENTRAL...SOUTHWEST...AND EAST CENTRAL IOWA. THOSE COUNTIES THAT ARE NO LONGER INCLUDED IN THE WATCH ARE... CRAWFORD CARROLL GREENE BOONE STORY MARSHALL DALLAS POLK JASPER POWESHIEK MADISON WARREN MARION CASS ADAIR MONTGOMERY ADAMS PAGE TAYLOR UNION RINGGOLD DECATUR LUCAS WAYNE TAMA BENTON LINN JOHNSON IOWA AUDOBON SHELBY GUTHRIE A TORNADO WATCHES REMAIN IN EFFECT FOR NORTHEAST IOWA UNTIL 11 PM...AND FOR NORTHWEST IOWA UNTIL 100 AM CDT WEDNESDAY MORNING. IN ADDITION...A SEVERE THUNDERSTORM WATCH IS ARE IN EFFECT FOR PARTS OF NORTHEASTT IOWA UNTIL MIDNIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AND MOVE INTO WESTERN AND SOUTHWEST IOWA LATERJ TONIGHT. ...NOTE TO BROADCASTERS... THE NATIONAL WEATHER SERVICE HAS EXTENDED THE TORNADO WATCH NUMBER 247 FOR NORTHEAST IOWA UNTIL 1100 AM TONIGHT. MCQUIRTER
Special weather statement, Jun 12, 9:37 PM CDT, 26 minutes before
IAZALL-130600- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE DES MOINES IA 935 PM CDT TUE JUN 12 1990 THE TORNADO WATCH NUMBER 247 IS NO LONGER IN EFFECT FOR THE FOLLOWING COUNTIES IN CENTRAL...SOUTHWEST...AND EAST CENTRAL IOWA. THOSE COUNTIES THAT ARE NO LONGER INCLUDED IN THE WATCH ARE... CRAWFORD CARROLL GREENE BOONE STORY MARSHALL DALLAS POLK JASPER POWESHIEK MADISON WARREN MARION CASS ADAIR MONTGOMERY ADAMS PAGE TAYLOR UNION RINGGOLD DECATUR LUCAS WAYNE TAMA BENTON LINN JOHNSON IOWA AUDOBON SHELBY GUTHRIE A TORNADO WATCHES REMAIN IN EFFECT FOR NORTHEAST IOWA UNTIL 11 PM...AND FOR NORTHWEST IOWA UNTIL 100 AM CDT WEDNESDAY MORNING. IN ADDITION...A SEVERE THUNDERSTORM WATCH IS ARE IN EFFECT FOR THE FAR NORTHEAST COUNTIES UNTIL 11PM. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AND MOVE INTO WESTERN AND SOUTHWWEST IOWA LATER TONIGHT. ...NOTE TO BROADCASTERS... THE NATIONAL WEATHER SERVICE HAS EXTENDED THE TORNADO WATCH NUMBER 247 FOR NORTHEAST IOWA UNTIL 1100 AM TONIGHT. MCQUIRTER
Special weather statement, Jun 12, 9:44 PM CDT, 19 minutes before
IAZALL-130400- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 943 PM CDT TUE JUN 12 1990 ...SEVERE THUNDERSTORM WATCH FOR FAR NORTHEAST IOWA UNTIL 11PM... ...A TORNADO WATCH NORTH CENTRAL AND NORTHEAST IOWA UNTIL 11PM... ...A TORNADO WATCH WESTERN IOWA UNTIL 1AM WEDNESDAY MORNING... AT 926 PM...INTENSE THUNDERSTORMS CONTINUED IN PART OF NORTH CENTRAL AND NORTHEAST IOWA. A SEVERE THUNDERSTORM WAS INDICATED IN FLOYD COUNTY...ABOUT 20 MILES EAST OF MASON CITY. AN ITENSE THUNDERSTORM WAS INDICATED JUST SOUTH OF NEW HAMPTON...OR ABOUT 30 MILES NORTH OF WATERLOO. OTHER SHOWERS AND THUNDERSTORMS WERE IN A 50 MILE WIDE AREA THAT EXTENDED FROM 30 MILES NORTHWEST OF MASON CITY...TO 30 MILES NORTHEAST OF WATERLOO. IN NORTHWEST IOWA...AN INTENSE THUNDERSTORM WAS INDICATED ABOUT 15 MILES SOUTHEAST OF SPIRIT LAKE. OTHER WEAKER THUNDERSTORMS WERE INDICATED FROM 15 MILES EAST OF SIOUX CITY...TO 40 MILES NORTHEAST OF SIOUX CITY. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. PERSONS IN THE SPIRIT LAKE AND ESTHERVILLE AREAS CAN EXPECT SHOWERS AND THUNDERSTORMS BY 900 PM. INTENSE THUNDERSTORMS WILL CONTINUE ACROSS NORTHEAST IOWA. ^ JAH
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, 8:45 PM CDT | Severe Thunderstorm Warning | DMX | Chickasaw | 60 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, 10:20 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; the sounding from the Mesonet's radiosonde archive.