Alert archive / Iowa / Tornado Warnings in 1991

Tornado Warning 25, NWS Des Moines, IA

June 10, 1991Tama County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 10, 1991, 3:43 PM CDT for Tama County, Iowa. It was in force for 11 min.

The area

The counties it named.

The facts

Issued
Jun 10, 1991, 3:43 PM CDT (20:43 UTC)
Expired
Jun 10, 1991, 3:54 PM CDT
In force
11 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Tama County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 8.7 hours before the alert went out and 320 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, Minneapolis, MN at 12:00Z on 1991-06-10Temperature 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, Minneapolis, MN at 12:00Z on 1991-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -84 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
907 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-84 m²/s²
0-3 km storm-relative helicity
-59 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 10, 4:48 PM CDTFlash Flood WarningDMXPolk3 hr
Jun 10, 5:14 PM CDTFlash Flood WarningDMXDallas3 hr

Nearby

Tornado Warnings in Iowa, 1991Every tornado warning in 1991Tornadoes 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.