Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 104, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 26, 1990, 8:18 PM CDT for Adair County, Iowa. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Jun 26, 1990, 8:18 PM CDT (01:18 UTC)
- Expired
- Jun 26, 1990, 8:45 PM CDT
- In force
- 27 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Adair 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 00:00Z, 1.3 hours before the alert went out and 159 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
- 3567 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 166 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 270120
SVRDSM
IAC001-270145-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
818 PM CDT TUE JUN 26 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 845 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHWEST IOWA
...SOUTHERN ADAIR
AT 815 PM RADAR INDICATED A RAPIDLY INTENSIFYING THUNDERSTORM IN
CENTRAL ADAIR COUNTY JUST NORTHEAST OF GREENFIELD...45 MILES SOUTHWEST
OF DES MOINES. THE STORM WAS MOVING SOUTH AT 20 TO 25 MILES AN HOUR.
SOME CITIES TO BE AFFECTED BY THIS STORM INCLUDE
GREENFIELD...FONTANELLE AND ORIENT.
THIS STORM HAS BEEN PULSING AND DROPPED TWO INCH HAIL IN STUART IN
GUTHRIE COUNTY AROUND 745 PM AS IT WAS DECREASING IN INTENSITY.
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.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
HUTTON/ELLISWhat 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, 4:40 PM CDT, 3 hours 38 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
Special weather statement, Jun 26, 5:42 PM CDT, 2 hours 36 minutes before
IAZALL-270000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 540 PM CDT TUE JUN 26 1990 AT 531 PM...AN ISOLATED INTENSE THUNDERSTORM CONTINUED IN NORTH CENTRAL IOWA...ABOUT 10 MILES NORTHEAST OF STORY CITY...OR ABOUT 45 MILES NORTH OF DES MOINES. THE STORM COULD STILL PRODUCE BRIEF...VERY HEAVY RAIN... HAIL AND WIND TO 50 MILES AN HOUR. THIS CELL WILL MOVE INTO NORTHERN STORY COUNTY BY 615 PM. OTHER WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED FROM 40 MILES NORTHWEST OF DES MOINES TO THE NORTHEAST CORNER OF THE STATE. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTH AT 20 MILES AN HOUR. HUTTON
Special weather statement, Jun 26, 6:21 PM CDT, 1 hour 57 minutes before
IAZ002-003-007-262430- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 620 PM CDT TUE JUN 26 1990 AT 610 PM CDT...A COUPLE OF STRONG THUNDERSTORMS WERE OCCURRING IN NORTHEAST IOWA...ONE IN ALLAMAKEE COUNTY NEAR THE CITIES OF POSTVILLE AND MONONA...AND ANOTHER IN NORTHERN BREMER AND SOUTHERN CHICKASAW COUNTIES. THE TOWN OF FREDERIKA IN NORTHERN BREMER COUNTY IS IN THE PATH OF THIS STORM. THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE BRIEF HEAVY RAINS...SOME SMALL HAIL...AND GUSTY WINDS. THE STORMS WERE MOVING TO THE SOUTH/SOUTHEAST AT 15 TO 20 MILES AN HOUR. OTHERWISE THE SKIES WERE PARTLY SUNNY AND TEMPERATURES WERE IN THE UPPER 80S. THE WINDS WERE FROM THE SOUTH/SOUTHWEST AT 5 TO 10 MILES AN HOUR. FOR THE NEXT FEW HOURS THE SCATTERED STRONG THUNDERSTORMS WILL CONTINUE ...MAINLY EAST OF HIGHWAY 218...ESPESCIALLY IN WESTERN FAYETTE AND NORTHERN BUCHANAN COUNTIES. TEMPERATURES WIL%L HOLD IN THE MIDDLE AND UPPER 80S WHILE THE WINDS CONTINUE FROM THE SOUTH AT 5 TO 10 MPH. COLLAR
Special weather statement, Jun 26, 6:53 PM CDT, 1 hour 25 minutes before
IAZALL-270100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 650 PM CDT TUE JUN 26 1990 AT 647 PM...INTENSE THUNDERSTORMS WERE LOCATED IN PART OF CENTRAL IOWA. ONE CELL WAS LOCATED IN WESTERN DALLAS COUNTY JUST NORTH OF REDFIELD OR ABOUT 25 MILES WEST OF DES MOINES. THIS STORM IS CAPABLE OF PRODUCING BRIEF...VERY HEAVY RAINFALL...HAIL...AND POSSIBLY WIND UP TO 50 MILES AN HOUR. OTHER INTENSE THUNDERSTORMS WERE LOCATED NORTH OF DES MOINES...FROM JUST WEST OF AMES TO SOUTHEAST STORY COUNTY...30 MILES NORTHEAST OF DES MOINES. THE THUNDERSTORMS WERE MOVING SOUTH AT 20 MILES AN HOUR. HUTTON
Special weather statement, Jun 26, 7:21 PM CDT, 57 minutes before
IAZ002-003-007-262600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 720 PM CDT TUE JUN 26 1990 AT 710 PM CDT A THUNDERSTORM WAS OCCURING IN CENTRAL BREMER COUNTY... 15 MILES NORTH OF WATERLOO...BETWEEN THE TOWNS OF DENVER AND TRIPOLI. ANOTHER STORM WAS IN FLOYD COUNTY...25 MILES EAST OF MASON CITY... BETWEEN THE TOWNS OF ROCKFORD AND CHARLES CITY. THESE STORMS WILL PRODUCE BRIEF HEAVY RAIN...DANGEROUS LIGHTNING...AND POSSIBLY SOMAE SMALL HAIL. THESE STORMS WERE MOVING TO THE SOUTH/SOUTHEAST AT 15 MILES AN HOUR AND WILL MOVE INTO NORTHCENTRAL AND NORTHEAST BLACK HAWK COUNTY BY AROUND 810 PM CDT. COLLAR
Special weather statement, Jun 26, 7:44 PM CDT, 34 minutes before
IAZALL-270130- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IOWA 740 PM CDT TUE JUN 26 1990 AT 732 PM...ISOLATED INTENSE THUNDERSTORMS WERE OVER CENTRAL AND NORTH- IOWA. IN THE CENTRAL COUNTIES THE STORMS WERE 30 MILES WEST OF DES MOINES NEAR REDFIELD AND 10 MILES NORTHEAST OF DES MOINES NEAR BONDURANT. IN THE NORTHEAST THE INTENSE STORM WAS EAST OF WATERLOO NEAR OELWEIN. IN ADDITION TO THE EXTREMELY HEAVY RAIYNS...WINDS AND HAIL ARE LIKELY. AND ISOLATED SHOWERS AND THUNDERSTORMS EXTENDED FROM WEST CENTRAL THROUGH CENTRAL INTO NORTHEAST IOWA. THE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTH AT 20 MILES AN HOUR. KS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:15 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 30 min |
| Jun 26, 8:48 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Union | 27 min |
| Jun 26, 9:00 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Grundy | 35 min |
| Jun 27, 2:22 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell | 53 min |
| Jun 27, 2:52 PM CDT | Severe Thunderstorm Warning | DMX | Floyd | 68 min |
| Jun 27, 3:09 PM CDT | Severe Thunderstorm Warning | DMX | Johnson, Linn | 36 min |
| Jun 27, 3:43 PM CDT | Severe Thunderstorm Warning | DMX | Johnson, Linn | 32 min |
| Jun 27, 3:44 PM CDT | Severe Thunderstorm Warning | DMX | Bremer, Butler | 61 min |
| Jun 27, 4:09 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 66 min |
| Jun 27, 5:08 PM CDT | Severe Thunderstorm Warning | DMX | Benton, Tama | 52 min |
| Jun 27, 5:48 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 30 min |
| Jun 27, 6:12 PM CDT | Severe Thunderstorm Warning | DMX | Johnson, Linn | 33 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.