Alert archive / Montana / Tornado Warnings in 2010

Tornado Warning 9, NWS Glasgow, MT

July 26, 2010Daniels County, Montana

NWS Glasgow, MT issued this tornado warning at Jul 26, 2010, 5:40 PM MDT for Daniels County, Montana. 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: Jul 26, 2010, 5:40 PM MDT (23:40 UTC)
Expired: Jul 26, 2010, 6:15 PM MDT
In force: 35 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon

County Daniels County, MT

The radar

The Glasgow radar (KGGW), 102 km from the middle of the area, began a volume at 23:42 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.

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 26, 4:15 PM MDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.7 hours before the alert went out and 426 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: 1418 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 1823 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before this tornado warning went out at Jul 26, 4:28 PM MDT, 1 hour 12 minutes earlier.

Area forecast discussion, Jul 26, 4:28 PM MDT, 1 hour 12 minutes before

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Hazardous weather outlook, Jul 26, 2:59 PM MDT, 2 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
259 PM MDT MON JUL 26 2010

MTZ016-017-021>023-271200-
CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-
PETROLEUM-GARFIELD-MCCONE-
259 PM MDT MON JUL 26 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A LAKE WIND ADVISORY IS IN EFFECT ACROSS FORT PECK LAKE TONIGHT
THROUGH EARLY TUESDAY MORNING FOR NORTHEAST WINDS OF 15 TO 20 MPH
AND GUSTS UP TO 30 MPH ASSOCIATED WITH A COLD FRONT SET TO MOVE
SOUTH THROUGH THE REGION.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 9:30 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	27 hr
Jul 26, 5:30 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	60 min
Jul 26, 5:30 PM MDT	Tornado Warning	GGW	Daniels, Valley	60 min

Nearby

Tornado Warnings in Montana, 2010 Every tornado warning in 2010 Tornadoes in 2010

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; radar from the NEXRAD Level II archive.