Alert archive / Iowa / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 11, NWS Des Moines, IA

April 26, 1986Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Apr 26, 1986, 8:12 PM CST for Crawford County, Iowa. It was in force for 33 min.

The area

The counties it named.

The facts

Issued: Apr 26, 1986, 8:12 PM CST (02:12 UTC)
Expired: Apr 26, 1986, 8:45 PM CST
In force: 33 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Crawford 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, 2.2 hours before the alert went out and 114 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: 3558 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 291 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, Apr 26, 2:36 PM CST, 5 hours 36 minutes before

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Special weather statement, Apr 26, 4:08 PM CST, 4 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
407 PM CST SAT APR 26 1986

     ...TORNADO WATCH TIL 9 PM FOR EXTREME WESTERN IOWA...

AT 345..
THERE WERE NO SHOWERS OR THUNDERSTO4RMS IN IOWA..HOWEVER RAPID
SHOWER AND THUNDERSTORM DEVELOPMENT WAS NOTED ACROSS EASTERN
NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

BARLOW

Special weather statement, Apr 26, 4:37 PM CST, 3 hours 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
435 PM CST SAT APR 26 1986

     ...TORNADO WATCH TIL 9 PM FOR EXTREME WESTERN IOWA...

AT 435..
THERE WERE NO SHOWERS OR THUNDERSTOZRMS IN IOWA..HOWEVER SHOWERS
AND THUNDERSTORMS CONTINUED TO DEVELOP OVER EASTERN NEBRASKA AND
SOUTHEAST SOUTH DAKOTA.

BARLOW

Special weather statement, Apr 26, 5:44 PM CST, 2 hours 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
543 PM CST SAT APR 26 1986

     ...TORNADO WATCH TIL 9 PM FOR EXTREME WESTERN IOWA...

AT 535..
THERE WERE NO SHOWERS OR THUNDERSTORMS IN IOWA..HOWEVER POWERFULL
THUNDERSTORMS CONTINUED RUMBLE ACROSS EASTERN NEBRASKA AND SOUTHEAST
SOUTH DAKOTA.  TORNADOES AND LARGE HAIL HAVE BEEN REPORTED IN THE
NORFOLK NEBRASKA AREA..WHILE SEVERE THUNDERSTORM WARNINGS HAVE
BEEN ISSUED FOR PARTS OF SOUTHEAST SOUTH DAKOTA.

IT APPEARS NOW THAT THESE STORMS WILL REMAIN JUST EAST OF THE
IOWA BORDER.

BARLOW

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 8:41 PM CST	Severe Thunderstorm Warning	DMX	Sac	34 min
Apr 26, 8:45 PM CST	Severe Thunderstorm Warning	DMX	Crawford	25 min
Apr 26, 9:15 PM CST	Severe Thunderstorm Warning	DMX	Sac	30 min
Apr 26, 9:45 PM CST	Severe Thunderstorm Warning	DMX	Sac	45 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1986 Every severe thunderstorm warning in 1986

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.