Alert archive / Montana / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 28, NWS Billings, MT

July 7, 2003Powder River County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 7, 2003, 9:50 PM MDT for Powder River County, Montana. It was in force for 55 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 7, 2003, 9:50 PM MDT (03:50 UTC)
Expired: Jul 7, 2003, 10:45 PM MDT
In force: 55 min
Issued by: NWS Billings, MT
Area: Whole counties

County Powder River County, MT

The radar

The Billings radar (KBLX), 237 km from the middle of the area, began a volume at 03:51 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 nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 3.8 hours before the alert went out and 340 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: 146 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 3311 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 7, 8:48 PM MDT, 1 hour 2 minutes earlier.

Area forecast discussion, Jul 7, 8:48 PM MDT, 1 hour 2 minutes before

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Hazardous weather outlook, Jul 7, 5:00 AM MDT, 16 hours 50 minutes before

MTZ028>042-056>058-WYZ098-099-081100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
500 AM MDT MON JUL 7 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL...SOUTHEAST
MONTANA AND NORTH CENTRAL WYOMING.

.DAY ONE...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAY TWO THROUGH SEVEN...
AN UPPER LEVEL DISTURBANCE WILL PUSH ACROSS SOUTHERN MONTANA AND
NORTH CENTRAL WYOMING TUESDAY AFTERNOON INTO TUESDAY NIGHT.
THUNDERSTORMS WILL BE POSSIBLE WITH THE DISTURBANCE. A FEW
THUNDERSTORMS MAY BECOME SEVERE...PRODUCING LARGE HAIL AND DAMAGING
WINDS.

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

JZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:10 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	65 min
Jul 7, 9:17 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	58 min
Jul 7, 11:48 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon	27 min
Jul 8, 2:49 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	56 min
Jul 8, 3:35 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	55 min
Jul 8, 4:52 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	53 min
Jul 8, 5:02 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	58 min
Jul 8, 5:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	62 min

Nearby

Severe Thunderstorm Warnings in Montana, 2003 Every severe thunderstorm warning in 2003

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.