Alert archive / Iowa / Tornado Warnings in 2001

Tornado Warning 52, NWS Des Moines, IA

June 12, 2001Crawford County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 12, 2001, 12:02 PM CDT for Crawford County, Iowa. It was in force for 28 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Jun 12, 2001, 12:02 PM CDT (17:02 UTC)
Expired
Jun 12, 2001, 12:30 PM CDT
In force
28 min
Issued by
NWS Des Moines, IA
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Crawford County, IA

The radar

The Omaha radar (KOAX), 105 km from the middle of the area, began a volume at 17:02 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 12, 12:15 PM CDTHail 1Charter Oak, IA
Jun 12, 12:20 PM CDTHail 1.75Dow City, IA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 12, 11:30 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 5.0 hours before the alert went out and 105 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 2001-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2590 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, Omaha, NE at 12:00Z on 2001-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 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
2590 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 121703
TORDSM
IAC047-121730-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1202 PM CDT TUE JUN 12 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN CRAWFORD COUNTY IN WEST CENTRAL IOWA

* UNTIL 1230 PM CDT

* AT 1201 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A    
  DEVELOPING TORNADO 16 MILES SOUTHWEST OF DENISON...OR ABOUT 48     
  MILES NORTH OF COUNCIL BLUFFS...MOVING EAST SOUTHEAST AT 40 MPH.

* THE TORNADO WILL BE...
  NEAR DOW CITY AT 1215 PM
  NEAR BUCK GROVE AT 1218 PM
  NEAR MANILLA AROUND 1230 PM

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY
ISSUED FOR THE WARNED AREA.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE.



LAT...LON 4208 9568 4184 9577 4187 9512 4205 9509

KULA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 10:06 PM CDTSevere Thunderstorm WarningDMXPocahontas44 min
Jun 11, 10:54 PM CDTSevere Thunderstorm WarningDMXPalo Alto51 min
Jun 11, 11:45 PM CDTSevere Thunderstorm WarningDMXPalo Alto45 min
Jun 12, 5:38 AM CDTSevere Thunderstorm WarningDMXMarshall32 min
Jun 12, 6:23 AM CDTSevere Thunderstorm WarningDMXTama47 min
Jun 12, 6:34 AM CDTSevere Thunderstorm WarningDMXPolk41 min
Jun 12, 6:35 AM CDTSevere Thunderstorm WarningDMXDallas30 min
Jun 12, 6:41 AM CDTSevere Thunderstorm WarningDMXJasper44 min
Jun 12, 7:24 AM CDTSevere Thunderstorm WarningDMXJasper31 min
Jun 12, 8:33 AM CDTSevere Thunderstorm WarningDMXWarren22 min
Jun 12, 8:42 AM CDTSevere Thunderstorm WarningDMXJasper, Marion28 min
Jun 12, 8:59 AM CDTSevere Thunderstorm WarningDMXMarion41 min
Jun 12, 9:02 AM CDTSevere Thunderstorm WarningDMXJasper38 min
Jun 12, 9:06 AM CDTSevere Thunderstorm WarningDMXMahaska39 min
Jun 12, 9:25 AM CDTSevere Thunderstorm WarningDMXGreene, Guthrie40 min
Jun 12, 9:31 AM CDTSevere Thunderstorm WarningDMXPolk19 min
Jun 12, 9:38 AM CDTSevere Thunderstorm WarningDMXJasper42 min
Jun 12, 9:45 AM CDTSevere Thunderstorm WarningDMXMarion30 min
Jun 12, 9:50 AM CDTSevere Thunderstorm WarningDMXBoone, Dallas40 min
Jun 12, 9:57 AM CDTSevere Thunderstorm WarningDMXMarshall, Polk, Story38 min
Jun 12, 10:03 AM CDTSevere Thunderstorm WarningDMXGreene32 min
Jun 12, 10:19 AM CDTSevere Thunderstorm WarningDMXJasper21 min
Jun 12, 10:27 AM CDTSevere Thunderstorm WarningDMXBoone28 min
Jun 12, 10:38 AM CDTSevere Thunderstorm WarningDMXMarshall32 min
Jun 12, 10:41 AM CDTSevere Thunderstorm WarningDMXJasper, Poweshiek29 min
Jun 12, 10:54 AM CDTSevere Thunderstorm WarningDMXBoone41 min
Jun 12, 11:09 AM CDTSevere Thunderstorm WarningDMXPoweshiek41 min
Jun 12, 11:13 AM CDTSevere Thunderstorm WarningDMXDallas42 min
Jun 12, 11:17 AM CDTTornado WarningDMXPoweshiek28 min
Jun 12, 11:18 AM CDTSevere Thunderstorm WarningDMXGreene42 min
Jun 12, 11:24 AM CDTSevere Thunderstorm WarningDMXHardin21 min
Jun 12, 11:50 AM CDTSevere Thunderstorm WarningDMXCrawford40 min
Jun 12, 11:57 AM CDTSevere Thunderstorm WarningDMXGreene28 min
Jun 12, 12:08 PM CDTSevere Thunderstorm WarningDMXBoone, Dallas42 min
Jun 12, 12:11 PM CDTSevere Thunderstorm WarningDMXPoweshiek39 min
Jun 12, 12:22 PM CDTSevere Thunderstorm WarningDMXPolk38 min
Jun 12, 12:25 PM CDTSevere Thunderstorm WarningDMXGreene30 min
Jun 12, 12:28 PM CDTTornado WarningDMXCrawford32 min
Jun 12, 12:46 PM CDTSevere Thunderstorm WarningDMXPoweshiek, Tama39 min
Jun 12, 12:48 PM CDTSevere Thunderstorm WarningDMXCarroll42 min
Jun 12, 1:22 PM CDTSevere Thunderstorm WarningDMXGreene28 min
Jun 12, 1:44 PM CDTSevere Thunderstorm WarningDMXJasper41 min
Jun 12, 1:51 PM CDTFlash Flood WarningDMXBoone, Story3 hr
Jun 12, 1:51 PM CDTSevere Thunderstorm WarningDMXCalhoun39 min
Jun 12, 2:08 PM CDTSevere Thunderstorm WarningDMXPolk42 min
Jun 12, 2:12 PM CDTFlash Flood WarningDMXGreene2 hr
Jun 12, 2:29 PM CDTFlash Flood WarningDMXJasper, Polk3 hr

Nearby

Tornado Warnings in Iowa, 2001Every tornado warning in 2001Tornadoes in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.