Alert archive / Iowa / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 110, NWS Des Moines, IA

June 14, 1991Story County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 14, 1991, 10:41 PM CDT for Story County, Iowa. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Jun 14, 1991, 10:41 PM CDT (03:41 UTC)
Expired
Jun 14, 1991, 11:25 PM CDT
In force
44 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Story County, IA

The nearest sounding before it

Omaha, NE (KOVN), launched 00:00Z, 3.7 hours before the alert went out and 254 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 00:00Z on 1991-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3690 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1991-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
3690 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1731 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
160 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 7:37 PM CDTSevere Thunderstorm WarningDMXChickasaw33 min
Jun 14, 7:37 PM CDTSevere Thunderstorm WarningDMXBremer68 min
Jun 14, 8:07 PM CDTSevere Thunderstorm WarningDMXBremer68 min
Jun 14, 8:43 PM CDTSevere Thunderstorm WarningDMXCerro Gordo47 min
Jun 14, 9:25 PM CDTSevere Thunderstorm WarningDMXBuena Vista50 min
Jun 14, 9:47 PM CDTSevere Thunderstorm WarningDMXSac43 min
Jun 14, 10:04 PM CDTSevere Thunderstorm WarningDMXPocahontas41 min
Jun 14, 10:13 PM CDTSevere Thunderstorm WarningDMXDallas, Polk47 min
Jun 14, 10:15 PM CDTSevere Thunderstorm WarningDMXDallas, Guthrie24 min
Jun 14, 11:26 PM CDTFlash Flood WarningDMXCerro Gordo, Floyd4 hr
Jun 14, 11:26 PM CDTFlash Flood WarningDMXBremer, Chickasaw, Fayette4 hr
Jun 15, 12:21 AM CDTTornado WarningDMXBremer39 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1991Every severe thunderstorm warning in 1991

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.