Alert archive / Iowa / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 71, NWS Omaha, NE

September 22, 1986Fremont County, Mills County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Sep 22, 1986, 2:54 PM CDT for Fremont County, Mills County, Iowa. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Sep 22, 1986, 2:54 PM CDT (19:54 UTC)
Expired
Sep 22, 1986, 4:00 PM CDT
In force
66 min
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Fremont County, IA, Mills 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

Topeka, KS (KTOP), launched 12:00Z, 7.9 hours before the alert went out and 210 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, Topeka, KS at 12:00Z on 1986-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1522 joules per kilogram.LCLLFCEL10008507005003002001001 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, Topeka, KS at 12:00Z on 1986-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 square meters per square second.193958Sfc1 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
1522 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
776 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.6

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 22, 9:50 AM CDTSevere Thunderstorm WarningOAXButler55 min
Sep 22, 10:13 AM CDTSevere Thunderstorm WarningOAXSaunders47 min
Sep 22, 10:54 AM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy41 min
Sep 22, 11:48 AM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy32 min
Sep 22, 12:49 PM CDTSevere Thunderstorm WarningOAXSaunders56 min
Sep 22, 1:07 PM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy68 min
Sep 22, 2:44 PM CDTSevere Thunderstorm WarningOAXRichardson61 min
Sep 22, 3:52 PM CDTSevere Thunderstorm WarningOAXRichardson58 min
Sep 22, 11:32 AM CDTSevere Thunderstorm WarningOAXMills, Pottawattamie58 min
Sep 22, 3:53 PM CDTSevere Thunderstorm WarningOAXPage67 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1986Every 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.