Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 101, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 26, 1990, 5:02 PM CDT for Hamilton County, Hardin County, Iowa. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Jun 26, 1990, 5:02 PM CDT (22:02 UTC)
- Expired
- Jun 26, 1990, 6:00 PM CDT
- In force
- 58 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Hamilton County, IA, Hardin 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, 10.0 hours before the alert went out and 267 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
- 3615 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 47 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 262204
SVRDSM
IAC079-083-262300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
502 PM CDT TUE JUN 26 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN CENTRAL IOWA
...EASTERN HAMILTON...WESTERN HARDIN
AT 455 PM...RADAR INDICATED A SEVERE THUNDERSTORM ON THE
HAMILTON/HARDIN COUNTY LINE...OR ABOUT 40 MILES EAST OF FORT DODGE.
THE STORMS WERE MOVING SOUTH AT 20 MILES AN HOUR.
TOWNS WHICH WILL BE AFFECTED BY THIS STORM INCLUDE
BUCKEYE...RADCLIFFE...AND INTERSTATE 35 FROM MILE MARKERS 142 SOUTH TO
124 SOUTH.
THIS STORM LIKELY PRODUCING LARGE HAIL.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
KS/ELLIS/HUTTON/FORSTERWhat 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 26, 3:16 PM CDT, 1 hour 46 minutes before
IAZ002-003-007-262100- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 315 PM CDT TUE JUN 26 1990 AT 310 PM CDT...ONE LONE STRONG THUNDERSTORM HAD DEV=ELOPED 15 MILES SOUTHWEST OF MASON CITY BETWEEN GARNER AND BELMOND. THIS THUNDERSTORM DEVELOPED VERY RAPIDLY AND IS PRODUCING EXTREMELY HEAVY RAINS. THIS STRONG THUNDERSTORM SHOULD BEGIN MOVING TO THE SOUTH. JOHNSON
Special weather statement, Jun 26, 3:44 PM CDT, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 340 PM CDT TUE JUN 26 1990 AT 333 PM...AN ISOLATED THUNDERSTORM WAS RAPIDLY INTENSIFYING OVER NORTH CENTRAL IOWA. THIUS VERY STRONG THUNDERSTORM WAS SOUTHWEST OF MASON CITY NEAR BELMOND. IN ADDITION TO THE HEAVY RAINS...SMALL HAIL IS LIKELY. THE STORM IS MOVING SOUTH AT 20 MILES AN HOUR...MOVING BETWEEN BELMOND AND HAMPTON BY 4 PM. KS
Special weather statement, Jun 26, 4:22 PM CDT, 40 minutes before
IAZ002-003-007-262200- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 420 PM CDT TUE JUN 26 1990 AT 415 PM CDT...THE ONE STRONG THUNDERSTORM WAS NOW 30 MILES SOUTH OF MASON CITY BETWEEN HAMPTON AND DOWS. VERY HEAVY RAINS AND SMALL HAIL CAN BE EXPECTED WITH THE PASSAGE OF THIS STORM AS IT MOVES TO THE SOUTH AT 15 MILES AN HOUR. THIS WILL PUT IT IN THE IOWA FALLS AREA BY 445 PM CDT. JOHNSON
Special weather statement, Jun 26, 4:40 PM CDT, 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 439 PM CDT TUE JUN 26 1990 AT 431 PM...AN ISOLATED INTENSE THUNDERSTORM CONTINUED IN NORTH CENTRAL IOWA...ABOUT 10 MILES SOUTHWEST OF HAMPTON OR 30 MILES SOUTHWEST OF MASON CITY. THE STORM IS STILL CAPABLE OF PRODUCING BRIEF...VERY HEAVY RAIN...HAIL AND WIND TO 50 MILES AN HOUR. IT SHOULD BE IN THE IOWA FALLS AREA BY 5PM. OTHER WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE DEVELOPING FROM 45 MILES NORTHWEST OF DES MOINES...TO 40 MILES NORTHEAST OF MASON CITY. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTH AT 20 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 26, 5:51 PM CDT | Severe Thunderstorm Warning | DMX | Story | 69 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.