Alert archive / Iowa / Tornado Warnings in 2001

Tornado Warning 38, NWS Des Moines, IA

May 10, 2001Boone County, Story County, Iowa

NWS Des Moines, IA issued this tornado warning at May 10, 2001, 5:25 PM CDT for Boone County, Story County, Iowa. It was in force for 45 min. 7 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 10, 2001, 5:25 PM CDT (22:25 UTC)
Expired: May 10, 2001, 6:10 PM CDT
In force: 45 min
Issued by: NWS Des Moines, IA
Area: Whole counties

Counties Boone County, IA, Story County, IA

What was reported inside it

Time	Report	Where	Remark
May 10, 5:27 PM CDT	Tornado F0	Kelley, IA	Brief touchdown in open area.
May 10, 5:29 PM CDT	Tornado F1	Madrid, IA	Tornado tracked down during its brief life through open country.
May 10, 5:30 PM CDT	Hail 0.75	Ames, IA
May 10, 5:30 PM CDT	Thunderstorm Wind 61 E	Ames, IA
May 10, 5:37 PM CDT	Hail 1	Boone, IA
May 10, 5:44 PM CDT	Hail 0.88	Ames, IA
May 10, 6:10 PM CDT	Thunderstorm Wind 65 E	Collins, 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.

Issued	Product	Office	Lasted
May 10, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.4 hours before the alert went out and 236 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1926 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 102225
TORDSM
IAC015-169-102310-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
525 PM CDT THU MAY 10 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  BOONE COUNTY IN CENTRAL IOWA
  WESTERN STORY COUNTY IN CENTRAL IOWA

* UNTIL 610 PM CDT

* AT 523 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 4 MILES SOUTHEAST OF BOONE...OR ABOUT 31 MILES NORTH OF DES
  MOINES...MOVING EAST AT 35 MPH.

* THE TORNADO WILL BE...
  NEAR AMES AROUND 540 PM
  8 MILES SOUTH OF STORY CITY AROUND 550 PM

IF YOU ARE IN A MULTI-STORY BUILDING...GO TO A SMALL INTERIOR ROOM OR
STAIRWELL. STAY AWAY FROM WINDOWS. DO NOT USE THE ELEVATOR.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY
EVENING FOR IOWA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT
UNTIL 1000 PM THURSDAY EVENING FOR SOUTHWEST IOWA.

LAT...LON 4219 9417 4186 9419 4188 9347 4222 9349

JOHNSON

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:06 PM CDT	Severe Thunderstorm Warning	DMX	Sac	29 min
May 9, 7:31 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto, Pocahontas	39 min
May 9, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	18 min
May 9, 8:32 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	38 min
May 9, 8:57 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	28 min
May 9, 9:14 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton	31 min
May 9, 10:20 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Tama	30 min
May 9, 10:41 PM CDT	Severe Thunderstorm Warning	DMX	Cass	29 min
May 9, 10:51 PM CDT	Severe Thunderstorm Warning	DMX	Tama	29 min
May 10, 12:20 AM CDT	Severe Thunderstorm Warning	DMX	Cass	30 min
May 10, 3:44 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	46 min
May 10, 3:58 PM CDT	Severe Thunderstorm Warning	DMX	Butler	32 min
May 10, 4:05 PM CDT	Tornado Warning	DMX	Hardin	30 min
May 10, 4:06 PM CDT	Severe Thunderstorm Warning	DMX	Greene	29 min
May 10, 4:33 PM CDT	Severe Thunderstorm Warning	DMX	Boone	47 min
May 10, 4:34 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	41 min
May 10, 4:35 PM CDT	Severe Thunderstorm Warning	DMX	Greene	30 min
May 10, 4:37 PM CDT	Tornado Warning	DMX	Greene	28 min
May 10, 4:56 PM CDT	Tornado Warning	DMX	Boone	29 min
May 10, 5:01 PM CDT	Tornado Warning	DMX	Marshall	19 min
May 10, 5:03 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	42 min
May 10, 5:05 PM CDT	Severe Thunderstorm Warning	DMX	Greene	40 min
May 10, 5:07 PM CDT	Tornado Warning	DMX	Grundy	13 min
May 10, 5:12 PM CDT	Severe Thunderstorm Warning	DMX	Butler	28 min
May 10, 5:15 PM CDT	Tornado Warning	DMX	Greene, Guthrie	40 min
May 10, 5:19 PM CDT	Tornado Warning	DMX	Tama	31 min
May 10, 5:39 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	46 min
May 10, 5:39 PM CDT	Tornado Warning	DMX	Tama	31 min
May 10, 5:50 PM CDT	Severe Thunderstorm Warning	DMX	Story	30 min
May 10, 5:54 PM CDT	Tornado Warning	DMX	Guthrie	41 min
May 10, 6:05 PM CDT	Tornado Warning	DMX	Marshall	40 min
May 10, 6:11 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	39 min
May 10, 6:24 PM CDT	Tornado Warning	DMX	Jasper	31 min
May 10, 6:27 PM CDT	Tornado Warning	DMX	Dallas	43 min
May 10, 6:38 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	42 min
May 10, 6:43 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	42 min

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.