Alert archive / Iowa / Tornado Warnings in 1993

Tornado Warning 21, NWS Des Moines, IA

July 8, 1993Carroll County, Crawford County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 8, 1993, 8:57 PM CDT for Carroll County, Crawford County, Iowa. It was in force for 19 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1993, 8:57 PM CDT (01:57 UTC)
Expired
Jul 8, 1993, 9:16 PM CDT
In force
19 min
Issued by
NWS Des Moines, IA
Area
Whole counties

Counties Carroll County, IA, Crawford County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.0 hours before the alert went out and 131 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 1993-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3257 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 1993-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 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
3257 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
341 m²/s²
Significant tornado parameter
6.3
Supercell composite
27.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDSM 090157
TORDSM
IAC027-047-090230-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
857 PM CDT THU JUL 8 1993
 
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  930 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION(S)S...
 
IN WEST CENTRAL IOWA
 
   ...WESTERN CARROLL COUNTY...EASTERN CRAWFORD COUNTY
 
AT 845 PM CDT...A TORNADO WAS REPORTED ON THE GROUND AND DOING DAMAGE 5
MILES SOUTH AND 1 MILES WEST OF VAIL. VAIL IS 60 MILES SOUTHWEST OF FORT
DODGE. MOVEMENT WAS EAST AT 30 MILES AN HOUR. PEOPLE IN VAIL...WESTSIDE
AND ARCADIA ARE IN THE PATH OF THIS TORNADO AND SHOULD TAKE COVER NOW!
 
R A PRENTICE
 
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
 
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 7:12 PM CDTSevere Thunderstorm WarningDMXCrawford43 min
Jul 8, 7:12 PM CDTSevere Thunderstorm WarningDMXCarroll48 min
Jul 8, 8:05 PM CDTSevere Thunderstorm WarningDMXCarroll, Greene, Guthrie55 min
Jul 8, 8:27 PM CDTFlash Flood WarningDMXCarroll, Crawford, Greene4 hr
Jul 8, 9:09 PM CDTTornado WarningDMXBoone36 min
Jul 8, 9:29 PM CDTFlash Flood WarningDMXBoone, Story4 hr
Jul 8, 9:29 PM CDTFlash Flood WarningDMXDallas, Guthrie4 hr
Jul 8, 9:31 PM CDTTornado WarningDMXChickasaw29 min
Jul 8, 9:52 PM CDTTornado WarningDMXBoone, Dallas38 min
Jul 8, 10:03 PM CDTTornado WarningDMXDallas, Polk27 min
Jul 8, 10:47 PM CDTFlash Flood WarningDMXBlack Hawk3 hr
Jul 8, 10:52 PM CDTSevere Thunderstorm WarningDMXBuchanan20 min
Jul 8, 11:25 PM CDTFlash Flood WarningDMXJasper, Polk5 hr
Jul 8, 11:25 PM CDTFlash Flood WarningDMXMarshall5 hr
Jul 8, 11:40 PM CDTSevere Thunderstorm WarningDMXAudubon, Carroll, Crawford35 min
Jul 8, 11:40 PM CDTSevere Thunderstorm WarningDMXAdams, Cass, Taylor35 min
Jul 8, 11:49 PM CDTFlash Flood WarningDMXBuchanan3 hr
Jul 9, 12:02 AM CDTSevere Thunderstorm WarningDMXAdair, Ringgold, Union28 min
Jul 9, 12:02 AM CDTSevere Thunderstorm WarningDMXGreene, Guthrie28 min
Jul 9, 12:22 AM CDTFlash Flood WarningDMXCarroll, Greene4 hr
Jul 9, 12:22 AM CDTFlash Flood WarningDMXAudubon4 hr
Jul 9, 12:33 AM CDTSevere Thunderstorm WarningDMXDallas, Madison, Polk, Warren27 min
Jul 9, 12:33 AM CDTSevere Thunderstorm WarningDMXClarke, Decatur27 min
Jul 9, 1:01 AM CDTFlash Flood WarningDMXBlack Hawk119 min
Jul 9, 1:05 AM CDTSevere Thunderstorm WarningDMXClarke, Decatur, Lucas, Wayne25 min
Jul 9, 1:05 AM CDTSevere Thunderstorm WarningDMXJasper, Marion, Polk25 min
Jul 9, 1:05 AM CDTSevere Thunderstorm WarningDMXWarren25 min
Jul 9, 1:22 AM CDTSevere Thunderstorm WarningDMXBlack Hawk23 min
Jul 9, 1:36 AM CDTSevere Thunderstorm WarningDMXMahaska, Poweshiek54 min
Jul 9, 1:36 AM CDTSevere Thunderstorm WarningDMXAppanoose, Davis, Monroe, Wapello54 min
Jul 9, 1:36 AM CDTSevere Thunderstorm WarningDMXJasper49 min
Jul 9, 2:11 AM CDTSevere Thunderstorm WarningDMXJefferson, Keokuk, Van Buren, Washington49 min
Jul 9, 2:11 AM CDTSevere Thunderstorm WarningDMXIowa, Johnson49 min
Jul 9, 10:21 AM CDTFlash Flood WarningDMXStory6 hr

Nearby

Tornado Warnings in Iowa, 1993Every tornado warning in 1993Tornadoes in 1993

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.