Alert archive / Iowa / Tornado Warnings in 2000

Tornado Warning 29, NWS Des Moines, IA

September 13, 2000Humboldt County, Kossuth County, Iowa

NWS Des Moines, IA issued this tornado warning at Sep 13, 2000, 8:40 PM CDT for Humboldt County, Kossuth County, Iowa. It was in force for 20 min. 3 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: Sep 13, 2000, 8:40 PM CDT (01:40 UTC)
Expired: Sep 13, 2000, 9:00 PM CDT
In force: 20 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Humboldt County, IA, Kossuth County, IA

The radar

The Des Moines radar (KDMX), 146 km from the middle of the area, began a volume at 01:40 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
Sep 13, 8:45 PM CDT	Hail 1	Algona, IA
Sep 13, 8:50 PM CDT	Thunderstorm Wind 52 E	Livermore, IA
Sep 13, 8:50 PM CDT	Thunderstorm Wind 56 E	Bode, 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
Sep 13, 7:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.7 hours before the alert went out and 253 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: 981 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 2594 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 140141
TORDSM

IAC091-109-140200-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
840 PM CDT WED SEP 13 2000

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN HUMBOLDT COUNTY IN NORTH CENTRAL IOWA
  SOUTHERN KOSSUTH COUNTY IN NORTH CENTRAL IOWA

* UNTIL 900 PM

* AT 835 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 5 MILES NORTH OF BODE...OR ABOUT 30 MILES NORTH OF FORT
  DODGE...MOVING SOUTHEAST AT 35 MPH.

* THE TORNADO WILL BE...
  NEAR HARDY AROUND 850 PM
  NEAR RENWICK AROUND 900 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 4314 9444 4275 9444 4273 9399 4313 9399

SMALL
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 8:07 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto, Pocahontas	53 min
Sep 13, 8:33 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth	27 min
Sep 13, 8:35 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	25 min
Sep 13, 8:53 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Wright	52 min
Sep 13, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth	17 min
Sep 13, 9:30 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster, Wright	45 min
Sep 13, 9:58 PM CDT	Severe Thunderstorm Warning	DMX	Hardin	47 min
Sep 13, 10:14 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Story	46 min
Sep 13, 10:41 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	34 min
Sep 14, 12:27 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	33 min
Sep 14, 2:50 AM CDT	Severe Thunderstorm Warning	DMX	Marion	40 min
Sep 14, 3:03 AM CDT	Severe Thunderstorm Warning	DMX	Mahaska	42 min

Nearby

Tornado Warnings in Iowa, 2000 Every tornado warning in 2000 Tornadoes in 2000

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.