Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 36, NWS Omaha, NE

June 13, 1990Montgomery County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jun 13, 1990, 6:05 PM CDT for Montgomery County, Iowa. It was in force for 20 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1990, 6:05 PM CDT (23:05 UTC)
Expired
Jun 13, 1990, 6:25 PM CDT
In force
20 min
Issued by
NWS Omaha, NE
Area
Whole counties

County Montgomery 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, 11.1 hours before the alert went out and 107 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 1990-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 1990-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 336 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3655 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
336 m²/s²
0-3 km storm-relative helicity
342 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 13, 5:52 PM CDT, 13 minutes before
NEZ010-020-IAZ009-140000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA NE
545 PM CDT WED JUN 13 1990

...A TORNADO WATCH REMAINS IN EFFECT FOR EXTREME SOUTHEAST NEBRASKA
AND SOUTHWEST IOWA UNTIL 11 PM CDT...

AT 535 PM CDT...SCATTERED THUNDERSTORMS WERE MOVING THROUGH SOUTHWEST
IOWA.  THE STRONGEST THUNDERSTORM WAS OVER SOUTHEAST MILLS COUNTY
10 MILES WEST OF RED OAK OR 30 MILES SOUTHEAST OF OMAHA.

THE THUNDERSTORM OVER SOUTHEAST MILLS COUNTY WAS MOVING SLOWLY
NORTHEAST AT 10 MILES AN HOUR AND WAS PRODUCING VERY HEAVY RAIN.
RAPID RISES IN SMALL STREAMS MAY OCCUR IN SOUTHEAST MILLS COUNTY.

ALL OF THE THUNDERSTORMS IN SOUTHWEST IOWA WILL LIKELY PRODUCE VERY
HEAVY RAIN...GUSTY WINDS...DANGEROUS LIGHTNING AND POSSIBLY SMALL HAIL.

IF YOU ARE IN THE PATH OF THESE THUNDERSTORMS...YOU SHOULD GO INTO
A STRONG REINFORCED BUILDING UNTIL AFTER THE STORM PASSES.
^
REMEMBER A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE
FOJR SEVERE THUNDERSTORMS AND POSSIBLY TORNADOES IN OR NEAR THE
WATCH AREA.
JOHNSON

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 12:41 AM CDTSevere Thunderstorm WarningOAXBurt34 min
Jun 13, 12:44 AM CDTSevere Thunderstorm WarningOAXHarrison46 min
Jun 13, 6:05 PM CDTSevere Thunderstorm WarningOAXMills40 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.