Alert archive / Montana / Tornado Warnings in 2010

Tornado Warning 11, NWS Billings, MT

June 20, 2010Big Horn County, Rosebud County, Montana

NWS Billings, MT issued this tornado warning at Jun 20, 2010, 7:21 PM MDT for Big Horn County, Rosebud County, Montana. It was in force for 24 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 20, 2010, 7:21 PM MDT (01:21 UTC)
Expired: Jun 20, 2010, 7:45 PM MDT
In force: 24 min
Issued by: NWS Billings, MT
Area: Storm-based polygon

Counties Big Horn County, MT, Rosebud County, MT

The radar

The Billings radar (KBLX), 116 km from the middle of the area, began a volume at 01:24 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
Jun 20, 12:55 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

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 Billings, MT wrote its last area forecast discussion before this tornado warning went out at Jun 20, 6:23 PM MDT, 58 minutes earlier.

Area forecast discussion, Jun 20, 6:23 PM MDT, 58 minutes before

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Hazardous weather outlook, Jun 20, 1:07 PM MDT, 6 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
107 PM MDT SUN JUN 20 2010

MTZ028>042-056>058-063>068-WYZ098-099-211915-
SOUTHERN WHEATLAND-MUSSELSHELL-TREASURE-NORTHERN ROSEBUD-CUSTER-
FALLON-NORTHERN STILLWATER-YELLOWSTONE-POWDER RIVER-CARTER-
SOUTHERN BIG HORN-EASTERN CARBON-NORTHERN PARK-
NORTHERN SWEET GRASS-GOLDEN VALLEY-RED LODGE FOOTHILLS-
NORTHERN BIG HORN-SOUTHERN ROSEBUD-JUDITH GAP-PARADISE VALLEY-
LIVINGSTON AREA-BEARTOOTH FOOTHILLS-ABSAROKA/BEARTOOTH MOUNTAINS-
CRAZY MOUNTAINS-NORTHEAST BIG HORN MOUNTAINS-SHERIDAN FOOTHILLS-
107 PM MDT SUN JUN 20 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL IMPACT THE FORECAST AREA THIS
AFTERNOON THROUGH TONIGHT. SOME OF THESE STORMS MAY BECOME
SEVERE...ESPECIALLY FROM ROUNDUP TO BILLINGS TO RED LODGE AND
EAST. THE PRIMARY THREATS WILL BE LARGE HAIL...STRONG
WINDS...HEAVY RAIN AND FREQUENT LIGHTNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A COLD FRONT WILL PUSH THROUGH THE FORECAST AREA MONDAY AFTERNOON
THROUGH MONDAY EVENING. THUNDERSTORMS ARE EXPECTED TO DEVELOP
ALONG THE FRONT. SOME OF THESE STORMS MAY BECOME SEVERE
ESPECIALLY OVER EXTREME SOUTHEASTERN MONTANA.

MONITOR NOAA WEATHER RADIO FOR THE LATEST
INFORMATION...FORECASTS...AND WARNINGS.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jun 20, 1:46 PM MDT, 5 hours 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
146 PM MDT SUN JUN 20 2010

MTZ038-202045-
SOUTHERN BIG HORN MT-
146 PM MDT SUN JUN 20 2010

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL BIG HORN COUNTY UNTIL 245
PM MDT...

AT 138 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 20 MILES SOUTHWEST OF LODGE GRASS...OR 38 MILES
NORTHWEST OF SHERIDAN...MOVING NORTH AT 15 MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN.

AREAS AFFECTED BY THIS STORM INCLUDE...LODGE GRASS.

THIS INCLUDES INTERSTATE 90 BETWEEN MILE MARKERS 522 AND 537.

LAT...LON 4546 10778 4543 10723 4501 10750 4502 10775
TIME...MOT...LOC 1946Z 184DEG 13KT 4511 10762

RNL

Local storm report, Jun 20, 2:58 PM MDT, 4 hours 23 minutes before

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Local storm report, Jun 20, 3:54 PM MDT, 3 hours 27 minutes before

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Local storm report, Jun 20, 4:33 PM MDT, 2 hours 48 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 6:00 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	60 min
Jun 20, 6:08 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	67 min
Jun 20, 6:12 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	63 min
Jun 20, 6:52 PM MDT	Flash Flood Warning	BYZ	Yellowstone	3 hr
Jun 20, 7:09 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	51 min
Jun 20, 7:09 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	49 min
Jun 20, 7:55 PM MDT	Flash Flood Warning	BYZ	Carter	3 hr
Jun 20, 9:05 PM MDT	Flash Flood Warning	BYZ	Carter	5 hr
Jun 20, 9:05 PM MDT	Special Weather Statement	BYZ	Rosebud	55 min
Jun 21, 4:07 AM MDT	Flash Flood Watch	BYZ	Big Horn, Carter, Custer, Fallon, Musselshell, Powder River and 3 more	19 hr
Jun 21, 11:58 AM MDT	Areal Flood Advisory	BYZ	Wheatland	22 hr
Jun 21, 4:55 PM MDT	Special Weather Statement	BYZ	Big Horn	65 min
Jun 21, 5:06 PM MDT	Special Weather Statement	BYZ	Big Horn	54 min
Jun 21, 5:24 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	66 min
Jun 21, 5:49 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	56 min
Jun 21, 5:51 PM MDT	Special Weather Statement	BYZ	Yellowstone	54 min
Jun 21, 5:54 PM MDT	Tornado Warning	BYZ	Big Horn, Rosebud	36 min
Jun 21, 5:59 PM MDT	Tornado Warning	BYZ	Powder River, Rosebud	31 min
Jun 20, 6:28 PM MDT	Severe Thunderstorm Warning	BYZ	Sheridan	49 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; radar from the NEXRAD Level II archive.