Alert archive / Montana / Tornado Warnings in 2000

Tornado Warning 9, NWS Glasgow, MT

July 4, 2000Garfield County, Montana

NWS Glasgow, MT issued this tornado warning at Jul 4, 2000, 4:11 PM MDT for Garfield County, Montana. It was in force for 49 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: Jul 4, 2000, 4:11 PM MDT (22:11 UTC)
Expired: Jul 4, 2000, 5:00 PM MDT
In force: 49 min
Issued by: NWS Glasgow, MT
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Garfield County, MT

What was reported inside it

Time	Report	Where	Remark
Jul 4, 4:38 PM MDT	Hail 1	Van Norman, MT
Jul 4, 4:40 PM MDT	Hail 2.75	Van Norman, MT

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
Jul 4, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.2 hours before the alert went out and 80 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: 19 J/kg
Mixed-layer CIN: -287 J/kg
Mixed-layer LCL: 780 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: 1 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.

000 
WFUS55 KGGW 042212
TORGGW

MTC033-042300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
411 PM MDT TUE JUL 4 2000

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN GARFIELD COUNTY IN NORTHEAST MONTANA

* UNTIL 500 PM MDT

* AT 407 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 18 MILES WEST OF VAN NORMAN...OR ABOUT 10 MILES NORTHEAST
  OF JORDAN...MOVING NORTHEAST AT 25 MPH.

* THE TORNADO PRODUCING STORM WILL REMAIN OVER...
  RURAL NORTHEASTERN GARFIELD COUNTY

VERY LARGE HAIL AND DAMAGING THUNDERSTORM WINDS ARE ALSO EXPECTED
WITH THIS STORM.

LAT...LON 4746 10694 4733 10675 4731 10631 4793 10638

.END 

79

The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 6:18 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	57 min
Jul 3, 6:37 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	53 min
Jul 3, 7:11 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	64 min
Jul 3, 7:16 PM MDT	Severe Thunderstorm Warning	GGW	Valley	59 min
Jul 3, 7:25 PM MDT	Tornado Warning	GGW	Valley	65 min
Jul 3, 7:35 PM MDT	Severe Thunderstorm Warning	GGW	McCone	55 min
Jul 3, 8:08 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	67 min
Jul 3, 8:15 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	60 min
Jul 3, 8:24 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	66 min
Jul 3, 8:27 PM MDT	Severe Thunderstorm Warning	GGW	McCone	63 min
Jul 3, 9:05 PM MDT	Tornado Warning	GGW	Roosevelt	55 min
Jul 3, 9:26 PM MDT	Severe Thunderstorm Warning	GGW	McCone	64 min
Jul 3, 9:47 PM MDT	Severe Thunderstorm Warning	GGW	Richland	58 min
Jul 3, 9:52 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt	53 min
Jul 3, 10:09 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	66 min
Jul 3, 10:41 PM MDT	Severe Thunderstorm Warning	GGW	Richland	64 min
Jul 3, 11:34 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	56 min
Jul 4, 12:35 AM MDT	Severe Thunderstorm Warning	GGW	Prairie	55 min
Jul 4, 1:37 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	53 min
Jul 4, 2:27 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
Jul 4, 3:25 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	65 min
Jul 4, 4:24 PM MDT	Tornado Warning	GGW	McCone	66 min
Jul 4, 5:26 PM MDT	Severe Thunderstorm Warning	GGW	McCone	64 min
Jul 4, 5:55 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	65 min

Nearby

Tornado Warnings in Montana, 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.