Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 105, NWS Des Moines, IA

June 26, 1990Adair County, Adams County, Union County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 26, 1990, 8:48 PM CDT for Adair County, Adams County, Union County, Iowa. It was in force for 27 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 26, 1990, 8:48 PM CDT (01:48 UTC)
Expired: Jun 26, 1990, 9:15 PM CDT
In force: 27 min
Issued by: NWS Des Moines, IA
Area: Whole counties

Counties Adair County, IA, Adams County, IA, Union 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 26, 9:01 PM CDT	Hail 0.88	Adams, 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, 1.8 hours before the alert went out and 160 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What 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, 6:53 PM CDT, 1 hour 55 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, 1 hour 27 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, 1 hour 4 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

Special weather statement, Jun 26, 8:22 PM CDT, 26 minutes before

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Special weather statement, Jun 26, 8:37 PM CDT, 11 minutes before

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Special weather statement, Jun 26, 8:38 PM CDT, 10 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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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, 8:18 PM CDT	Severe Thunderstorm Warning	DMX	Adair	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, 1990 Every 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.