Alert archive / Iowa / Tornado Warnings in 1998

Tornado Warning 43, NWS Des Moines, IA

June 27, 1998Franklin County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 27, 1998, 8:15 PM CDT for Franklin County, Iowa. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 27, 1998, 8:15 PM CDT (01:15 UTC)
Expired: Jun 27, 1998, 8:50 PM CDT
In force: 35 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Franklin County, IA

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 27, 7:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.3 hours before the alert went out and 237 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: 2178 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

005 
WFUS1 KDSM 280116 RRA
TORDSM
IAC069-280150-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
815 PM CDT SAT JUN 27 1998

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTHERN FRANKLIN COUNTY IN NORTH CENTRAL IOWA

* UNTIL 850 PM CDT

* AT 815 PM CDT... DOPPLER RADAR INDICATED A DEVELOPING TORNADO 18
  MILES SOUTH OF MASON CITY OR 1 MILE WEST OF SHEFFIELD MOVING EAST
  AT 30 MPH.

* THIS TORNADO CAN BE EXPECTED NEAR...
   SHEFFIELD          BY 820 PM CDT

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

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 7:27 PM CDT	Tornado Warning	DMX	Worth	33 min
Jun 27, 7:38 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	47 min
Jun 27, 7:41 PM CDT	Tornado Warning	DMX	Cerro Gordo	34 min
Jun 27, 8:18 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	32 min
Jun 27, 8:44 PM CDT	Flash Flood Warning	DMX	Cerro Gordo	3 hr
Jun 27, 8:49 PM CDT	Tornado Warning	DMX	Cerro Gordo	21 min
Jun 27, 8:54 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	36 min
Jun 27, 10:08 PM CDT	Tornado Warning	DMX	Butler	32 min
Jun 27, 10:33 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	62 min
Jun 27, 10:33 PM CDT	Severe Thunderstorm Warning	DMX	Boone	62 min
Jun 27, 10:38 PM CDT	Tornado Warning	DMX	Bremer, Butler	32 min
Jun 27, 10:45 PM CDT	Severe Thunderstorm Warning	DMX	Butler	50 min
Jun 27, 10:57 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	48 min
Jun 27, 11:01 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk, Story	64 min
Jun 27, 11:10 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	50 min
Jun 27, 11:18 PM CDT	Severe Thunderstorm Warning	DMX	Polk	62 min
Jun 27, 11:18 PM CDT	Severe Thunderstorm Warning	DMX	Marshall	62 min
Jun 27, 11:21 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk	64 min
Jun 27, 11:24 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	61 min
Jun 28, 12:01 AM CDT	Severe Thunderstorm Warning	DMX	Tama	64 min
Jun 28, 12:05 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	65 min
Jun 28, 12:40 AM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	65 min

Nearby

Tornado Warnings in Iowa, 1998 Every tornado warning in 1998 Tornadoes in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.