Alert archive / Iowa / Tornado Warnings in 2001

Tornado Warning 51, NWS Des Moines, IA

June 12, 2001Poweshiek County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 12, 2001, 11:17 AM CDT for Poweshiek 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, 11:17 AM CDT (16:17 UTC)
Expired: Jun 12, 2001, 11:45 AM CDT
In force: 28 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Poweshiek County, IA

The radar

The Des Moines radar (KDMX), 93 km from the middle of the area, began a volume at 16:16 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

Time	Report	Where	Remark
Jun 12, 11:23 AM CDT	Hail 1.5	Searsboro, IA
Jun 12, 11:25 AM CDT	Tornado F0	Montezuma, IA	Brief touchdown in open country.

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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 4.3 hours before the alert went out and 176 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1058 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 1054 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -192 m²/s²
0-3 km storm-relative helicity: -154 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 121617
TORDSM
IAC157-121645-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1117 AM CDT TUE JUN 12 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN POWESHIEK COUNTY IN CENTRAL IOWA

* UNTIL 1145 AM CDT

* AT 1116 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 8 MILES WEST OF MONTEZUMA...OR ABOUT 41 MILES NORTH OF
  OTTUMWA...MOVING EAST AT 25 MPH.

* THE TORNADO WILL BE...
  NEAR SEARSBORO NOW
  NEAR MONTEZUMA AROUND 1130 AM

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

IF NO BASEMENT IS AVAILABLE...GO TO THEx LOWEST FLOOR OF THE BUILDING
OR INTO AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET.

LAT...LON 4159 9285 4152 9237 4174 9224 4174 9276

KULA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 10:06 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	44 min
Jun 11, 10:54 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	51 min
Jun 11, 11:45 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	45 min
Jun 12, 5:38 AM CDT	Severe Thunderstorm Warning	DMX	Marshall	32 min
Jun 12, 6:23 AM CDT	Severe Thunderstorm Warning	DMX	Tama	47 min
Jun 12, 6:34 AM CDT	Severe Thunderstorm Warning	DMX	Polk	41 min
Jun 12, 6:35 AM CDT	Severe Thunderstorm Warning	DMX	Dallas	30 min
Jun 12, 6:41 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	44 min
Jun 12, 7:24 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	31 min
Jun 12, 8:33 AM CDT	Severe Thunderstorm Warning	DMX	Warren	22 min
Jun 12, 8:42 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion	28 min
Jun 12, 8:59 AM CDT	Severe Thunderstorm Warning	DMX	Marion	41 min
Jun 12, 9:02 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	38 min
Jun 12, 9:06 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska	39 min
Jun 12, 9:25 AM CDT	Severe Thunderstorm Warning	DMX	Greene, Guthrie	40 min
Jun 12, 9:31 AM CDT	Severe Thunderstorm Warning	DMX	Polk	19 min
Jun 12, 9:38 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	42 min
Jun 12, 9:45 AM CDT	Severe Thunderstorm Warning	DMX	Marion	30 min
Jun 12, 9:50 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas	40 min
Jun 12, 9:57 AM CDT	Severe Thunderstorm Warning	DMX	Marshall, Polk, Story	38 min
Jun 12, 10:03 AM CDT	Severe Thunderstorm Warning	DMX	Greene	32 min
Jun 12, 10:19 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	21 min
Jun 12, 10:27 AM CDT	Severe Thunderstorm Warning	DMX	Boone	28 min
Jun 12, 10:38 AM CDT	Severe Thunderstorm Warning	DMX	Marshall	32 min
Jun 12, 10:41 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Poweshiek	29 min
Jun 12, 10:54 AM CDT	Severe Thunderstorm Warning	DMX	Boone	41 min
Jun 12, 11:09 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	41 min
Jun 12, 11:13 AM CDT	Severe Thunderstorm Warning	DMX	Dallas	42 min
Jun 12, 11:18 AM CDT	Severe Thunderstorm Warning	DMX	Greene	42 min
Jun 12, 11:24 AM CDT	Severe Thunderstorm Warning	DMX	Hardin	21 min
Jun 12, 11:50 AM CDT	Severe Thunderstorm Warning	DMX	Crawford	40 min
Jun 12, 11:57 AM CDT	Severe Thunderstorm Warning	DMX	Greene	28 min
Jun 12, 12:02 PM CDT	Tornado Warning	DMX	Crawford	28 min
Jun 12, 12:08 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas	42 min
Jun 12, 12:11 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	39 min
Jun 12, 12:22 PM CDT	Severe Thunderstorm Warning	DMX	Polk	38 min
Jun 12, 12:25 PM CDT	Severe Thunderstorm Warning	DMX	Greene	30 min
Jun 12, 12:28 PM CDT	Tornado Warning	DMX	Crawford	32 min
Jun 12, 12:46 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	39 min
Jun 12, 12:48 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	42 min
Jun 12, 1:22 PM CDT	Severe Thunderstorm Warning	DMX	Greene	28 min
Jun 12, 1:44 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	41 min
Jun 12, 1:51 PM CDT	Flash Flood Warning	DMX	Boone, Story	3 hr
Jun 12, 1:51 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	39 min
Jun 12, 2:08 PM CDT	Severe Thunderstorm Warning	DMX	Polk	42 min
Jun 12, 2:12 PM CDT	Flash Flood Warning	DMX	Greene	2 hr
Jun 12, 2:29 PM CDT	Flash Flood Warning	DMX	Jasper, Polk	3 hr

Nearby

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