Alert archive / Iowa / Tornado Warnings in 1999

Tornado Warning 35, NWS Des Moines, IA

June 6, 1999Wright County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 6, 1999, 4:13 PM CDT for Wright County, Iowa. It was in force for 32 min. 1 report 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: Jun 6, 1999, 4:13 PM CDT (21:13 UTC)
Expired: Jun 6, 1999, 4:45 PM CDT
In force: 32 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Wright County, IA

The radar

The Des Moines radar (KDMX), 111 km from the middle of the area, began a volume at 21:15 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 6, 4:19 PM CDT	Tornado F0	Belmond, 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
Jun 6, 2:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.2 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: 1851 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 283 m²/s²
0-3 km storm-relative helicity: 338 m²/s²
Significant tornado parameter: 2.7
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDSM 062113 RRA
TORDSM
IAC197-062145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
413 PM CDT SUN JUN 6 1999

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN WRIGHT COUNTY IN NORTH CENTRAL IOWA

* UNTIL 445 PM CDT

* AT 412 PM CDT... THE PUBLIC REPORTED A TORNADO 23 MILES EAST
  NORTHEAST OF FORT DODGE OR 10 MILES SOUTHWEST OF GALT... MOVING
  NORTHEAST AT 45 MPH.

* THIS TORNADO CAN BE EXPECTED NEAR...
   WALL LAKE          BY 420 PM CDT
   GALT               BY 425 PM CDT
   DOWS               BY 428 PM CDT
   ROWAN              BY 430 PM CDT

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

MYEtRS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 7:08 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	32 min
Jun 5, 8:24 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	36 min
Jun 6, 2:32 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	33 min
Jun 6, 3:09 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth	36 min
Jun 6, 3:19 PM CDT	Severe Thunderstorm Warning	DMX	Greene, Webster	31 min
Jun 6, 3:36 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	34 min
Jun 6, 3:39 PM CDT	Tornado Warning	DMX	Webster	36 min
Jun 6, 3:58 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Wright	32 min
Jun 6, 3:58 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton	32 min
Jun 6, 4:30 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin	30 min
Jun 6, 4:33 PM CDT	Tornado Warning	DMX	Franklin	32 min
Jun 6, 5:45 PM CDT	Severe Thunderstorm Warning	DMX	Audubon	35 min
Jun 6, 5:52 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	33 min
Jun 6, 6:16 PM CDT	Severe Thunderstorm Warning	DMX	Greene	34 min
Jun 6, 6:29 PM CDT	Tornado Warning	DMX	Adair, Cass	31 min
Jun 6, 6:36 PM CDT	Tornado Warning	DMX	Boone, Greene, Webster	49 min
Jun 6, 6:42 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Wright	33 min

Nearby

Tornado Warnings in Iowa, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.