Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 87, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 19, 1990, 6:30 AM CDT for Boone County, Hamilton County, Iowa. It was in force for 30 min. 3 reports 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 19, 1990, 6:30 AM CDT (11:30 UTC)
- Expired
- Jun 19, 1990, 7:00 AM CDT
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Boone County, IA, Hamilton 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 19, 6:40 AM CDT | Thunderstorm Wind 56 | Hamilton, IA | |
| Jun 19, 6:45 AM CDT | Tornado F1 | Hamilton, IA | |
| Jun 19, 7:00 AM CDT | Thunderstorm Wind 50 | Hamilton, 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, 11.5 hours before the alert went out and 234 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
- 3604 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 281 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 191132
SVRDSM
IAC015-079-191200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
630 AM CDT TUE JUN 19 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN CENTRAL IOWA
...BOONE...HAMILTON
AT 625 AM...A SEVERE THUNDERSTORM WAS SOUTHEAST OF FORT DODGE. A
REPORT OF 61 MPH WIND GUST WAS REPORTED AT THE AIRPORT. THE STORM WILL
BE AFFECTING THE CITIES WEBSTER CITY...BOONE AND NEARBY COMMUNITIES.
THE STORM WAS MOVING SOUTHEAST AT 40 MILES AN HOUR.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUkCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
JMWhat 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 19, 3:45 AM CDT, 2 hours 45 minutes before
IAZALL-191000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 345 AM CDT TUE JUN 19 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHWEST IOWA UNTIL 8AM... ...FLASH FLOOD WATCH FOR WESTERN HALF REST OF TONIGHT... AT 330 AM...INTENSE THUNDERSTORMS WERE LOCATED IN NORTHWEST IOWA. ONE STORM WAS INDICATED IN EASTERN PLYMOUTH COUNTY...20 MILES NORTHEAST OF SIOUX CITY. ANOTHER WAS LOCATED 8 MILES NORTH OF DENISON...OR ABOUT 85 MILES NORTHWEST OF DES MOINES. THE STORMS WILL LIKELY PRODUCE VERY HEAVY RAIN...SMALL HAIL AND WIND TO 50 MILES AN HOUR. OTHERWISE... SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED WEST OF A LINE FROM LAMONI...TO 15 MILES WEST OF DES MOINES...TO NEAR SPENCER IN THE FAR NORTHWEST SECTION OF THE STATE. SEVERE THUNDERSTORMS WERE MOVING OUT OF SOUTH DAKOTA AND MINNESOTA INTO THE NORTHWEST CORNER OF THE STATE. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. HUhTTON
Special weather statement, Jun 19, 4:14 AM CDT, 2 hours 16 minutes before
IAZALL-191000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 408 AM CDT TUE JUN 19 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHWEST IOWA UNTIL 8AM... ...FLASH FLOOD WATCH FOR WESTERN HALF REST OF TONIGHT... AT 405 AM...INTENSE THUNDERSTORMS WERE LOCATED IN NORTHWEST IOWA. ONE STORM WAS INDICATED ABOUT 10 MILES NORTHWEST OF CARROLL...OR ABOUT 70 MILES NORTHWEST OF DES MOINES. ANOTHER WAS INDICATED JUST SOUTHEAST OF CHEROKEE...OR ABOUT 40 MILES NORTHEAST OF SIOUX CITY. THE STORMS WILL LIKELY PRODUCE BRIEF...VERY HEAVY RAINFALL...SMALL HAIL AND WIND GUSTS OF 30 TO 50 MILES AN HOUR. ELSEWHERE...SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED ACROSS THE} WESTERN HALF OF THE STATE...FROM 10 MILES EAST OF LAMONI...THROUGH DES MOINES...TO 40 MILES WEST OF MASON CITY. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. HUTTON
Special weather statement, Jun 19, 4:44 AM CDT, 1 hour 46 minutes before
IAZALL-191000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 443 AM CDT TUE JUN 19 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHWEST IOWA UNTIL 8AM... ...FLASH FLOOD/FLOOD WATCH ENTIRE STATE TODAY... AT 427 AM...INTENSE THUNDERSTORMS WERE LOCATED IN WEST CENTRAL AND NORTHWEST IOWA. ON STORM WAS NEAR CARROLL...OR ABOUT 65 MILES NORTHWEST OF DES MOINES. ANOTHER WAS LOCATED IN FAR NORTHWEST IOWA....IN WESTERN O BRIEN COUNTY...OR ABOUT 45 MILES NORTHEAST OF SIOUX CITY. THESE STORMS WILL LIKELY PRODUCE BRIEF HEAVY RAIN...HAIL...AND GUSTY WIND OF 30 TO 50 MILES AN HOUR. OTHERWISE...SCATTERED SHOWERS AND THUNDERSTORMS WERE INDICATED WEST OF A LINE FROM 30 MILES SOUTHWEST OF OTTUMWA... THROUGH DES MOINES TO NEAR FORT DODGE...AND NORTH TO 20 MILES NORTHWEST OF MASON CITY. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. HUTTON
Special weather statement, Jun 19, 5:57 AM CDT, 33 minutes before
IAZALL-191145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 555 AM CDT TUE JUN 19 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHWEST IOWA UNTIL 8AM... ...FLASH FLOOD/FLOOD WATCH ENTIRE STATE TODAY... AT 535 AM...INTENSE THUNDERSTORMS WERE LOCATED OVER NORTHWEST AND PARTS OF CENTRAL IOWA. A CLUSTER OF INTENSE STORMS WERE LOCATED NEAR ALGONA ...LAURENS...AND STORM LAKE IN THE NORTHWEST IOWA. ANOTHER ISOLATED INTENSE THUNDERSTORM WAS LOCATED ABOUT 40 MILES NORTHWEST OF DES MOINES JUST NORTH OF PERRY. THESE STORMS ARE LIKELY TO PRODUCE STRONG WINDS IN EXCESS OF 40 MPH... SMALL HAIL...AND HEAVY RAINS. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEASTN AT 30 MILES AN HOUR. MCQUIRTER HUTTON
Special weather statement, Jun 19, 6:01 AM CDT, 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WETHER SERVICE DES MOINES IA 558 AM CDT TUE JUN 19 1990 AT 555 AM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS THAT EXTENDED FROM 30 MILES TO THE NORTHWEST OF FORT DODGE TO ABOUT 25 MILES TO THE WEST OF FORT DODGE NEAR POMEROY. THIS LINE WAS MOVING TO THE SOUTHEAST AT 40 MILES AN HOUR AND WILL GO THROUGH THE FORT DODGE AREA BETWEEN 615AM AND 635 AM. WINDS OF 50 TO 55 MILES AN HOUR...HEAVY RAINS AND PEA TO MTARBLE SIZE CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS. THESE HEAVY RAINS MAY CAUSE SOME STREET FLOODING IN THE FORT DODGE AREA. WEINBRECHT
Special weather statement, Jun 19, 6:18 AM CDT, 12 minutes before
IAZ001-004-005-191200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 615 AM CDT TUE JUN 19 1990 THE SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHWEST IOWA HAS BEEN CANCELLED. ALTcHOUGH SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE IN THE AREA UNTIL AT LEAST 9 AM...THESE THUNDERSTORMS ARE NOT EXPECTED TO BE SEVERE. WEINBRECHT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 4:22 AM CDT | Severe Thunderstorm Warning | DMX | Dickinson | 28 min |
| Jun 19, 4:39 AM CDT | Severe Thunderstorm Warning | DMX | Clay, Emmet | 31 min |
| Jun 19, 5:35 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas | 25 min |
| Jun 19, 6:55 AM CDT | Severe Thunderstorm Warning | DMX | Hardin, Story | 25 min |
| Jun 19, 7:18 AM CDT | Severe Thunderstorm Warning | DMX | Marshall | 27 min |
| Jun 19, 9:50 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Monroe | 55 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.