Alert archive / Montana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 40, NWS Billings, MT

June 26, 2011Carter County, Fallon County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 26, 2011, 6:48 AM MDT for Carter County, Fallon County, Montana. It was in force for 57 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 26, 2011, 6:48 AM MDT (12:48 UTC)
Expired: Jun 26, 2011, 7:45 AM MDT
In force: 57 min
Issued by: NWS Billings, MT
Area: Storm-based polygon

Counties Carter County, MT, Fallon County, MT

The radar

The Rapid City radar (KUDX), 238 km from the middle of the area, began a volume at 12:50 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

Rapid City, SD (KUNR), launched 12:00Z, 0.8 hours before the alert went out and 241 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: 277 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 837 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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 Jun 26, 4:01 AM MDT, 2 hours 47 minutes earlier.

Area forecast discussion, Jun 26, 4:01 AM MDT, 2 hours 47 minutes before

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Hazardous weather outlook, Jun 26, 4:13 AM MDT, 2 hours 35 minutes before

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In the hours before

Special weather statement, Jun 26, 2:03 AM MDT, 4 hours 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
203 AM MDT SUN JUN 26 2011

MTZ037-260900-
CARTER MT-
203 AM MDT SUN JUN 26 2011

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CARTER COUNTY UNTIL 300
AM MDT...

AT 200 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 11 MILES NORTHEAST OF RIDGEWAY...OR 22 MILES
SOUTHEAST OF EKALAKA...MOVING NORTHEAST AT 30 MPH.

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

THIS STORM WILL BE NEAR...
  RURAL EASTERN CARTER COUNTY...
  RURAL NORTHEASTERN CARTER COUNTY...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 4549 10446 4560 10460 4588 10413 4588 10403
      4559 10403
TIME...MOT...LOC 0803Z 235DEG 24KT 4561 10434

Local storm report, Jun 26, 3:08 AM MDT, 3 hours 40 minutes before

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Special weather statement, Jun 26, 6:29 AM MDT, 19 minutes before

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Special weather statement, Jun 26, 6:43 AM MDT, 5 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 26, 2:03 AM MDT	Special Weather Statement	BYZ	Carter	57 min
Jun 26, 2:28 AM MDT	Severe Thunderstorm Warning	BYZ	Carter	62 min
Jun 26, 6:29 AM MDT	Special Weather Statement	BYZ	Fallon	61 min
Jun 26, 6:43 AM MDT	Special Weather Statement	BYZ	Powder River	62 min
Jun 26, 12:47 PM MDT	Special Weather Statement	BYZ	Yellowstone	58 min
Jun 26, 1:56 PM MDT	Special Weather Statement	BYZ	Big Horn	64 min
Jun 26, 2:31 PM MDT	Special Weather Statement	BYZ	Rosebud	59 min
Jun 26, 4:24 PM MDT	Special Weather Statement	BYZ	Custer, Powder River	66 min

Nearby

Severe Thunderstorm Warnings in Montana, 2011 Every severe thunderstorm warning in 2011

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.