Alert archive / Montana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 68, NWS Billings, MT

July 27, 2016Yellowstone County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 27, 2016, 3:01 PM MDT for Yellowstone County, Montana. It was in force for 59 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 27, 2016, 3:01 PM MDT (21:01 UTC)
Expired: Jul 27, 2016, 4:00 PM MDT
In force: 59 min
Issued by: NWS Billings, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Yellowstone County, MT

The radar

The Billings radar (KBLX), 27 km from the middle of the area, began a volume at 21:01 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 12:00Z, 9.0 hours before the alert went out and 319 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: 23 J/kg
Mixed-layer CIN: -281 J/kg
Mixed-layer LCL: 2318 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 27, 2:43 PM MDT, 18 minutes earlier.

Area forecast discussion, Jul 27, 2:43 PM MDT, 18 minutes before

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Hazardous weather outlook, Jul 27, 2:59 PM MDT, 2 minutes before

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In the hours before

Special weather statement, Jul 27, 1:42 PM MDT, 1 hour 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
142 PM MDT WED JUL 27 2016

MTZ029-272030-
MUSSELSHELL MT-
142 PM MDT WED JUL 27 2016

...SIGNIFICANT WEATHER ADVISORY...

AT 141 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7
MILES NORTHWEST OF ROUNDUP...MOVING SOUTHEAST AT 35 MPH.

NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
ROUNDUP AND KLEIN.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4640 10782 4640 10793 4638 10793 4638 10795
      4635 10797 4633 10801 4626 10820 4627 10832
      4625 10832 4624 10840 4618 10840 4615 10849
      4655 10890 4669 10868
TIME...MOT...LOC 1941Z 293DEG 32KT 4654 10864

PALMQUIST

Local storm report, Jul 27, 2:01 PM MDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
201 PM MDT WED JUL 27 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0201 PM     TSTM WND GST     1 N ROUNDUP             46.48N 108.54W
07/27/2016  M50.00 MPH       MUSSELSHELL        MT   PUBLIC

0201 PM     HAIL             1 N ROUNDUP             46.48N 108.54W
07/27/2016  M0.50 INCH       MUSSELSHELL        MT   PUBLIC

&&

LD

Local storm report, Jul 27, 2:09 PM MDT, 52 minutes before

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Local storm report, Jul 27, 2:22 PM MDT, 39 minutes before

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Special weather statement, Jul 27, 2:47 PM MDT, 14 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
Jul 26, 6:42 PM MDT	Special Weather Statement	BYZ	Stillwater	63 min
Jul 26, 8:19 PM MDT	Special Weather Statement	BYZ	Yellowstone	56 min
Jul 26, 8:53 PM MDT	Special Weather Statement	BYZ	Big Horn	52 min
Jul 26, 9:48 PM MDT	Special Weather Statement	BYZ	Treasure	42 min
Jul 26, 10:34 PM MDT	Special Weather Statement	BYZ	Big Horn	56 min
Jul 27, 1:42 PM MDT	Special Weather Statement	BYZ	Musselshell	48 min
Jul 27, 2:19 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	26 min
Jul 27, 2:47 PM MDT	Special Weather Statement	BYZ	Yellowstone	58 min
Jul 27, 3:10 PM MDT	Special Weather Statement	BYZ	Stillwater	65 min
Jul 27, 3:39 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	37 min
Jul 27, 4:01 PM MDT	Special Weather Statement	BYZ	Yellowstone	59 min
Jul 27, 4:15 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater, Yellowstone	37 min
Jul 27, 4:34 PM MDT	Special Weather Statement	BYZ	Golden Valley	56 min
Jul 27, 5:13 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Stillwater, Yellowstone	47 min
Jul 27, 5:43 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	46 min

Nearby

Severe Thunderstorm Warnings in Montana, 2016 Every severe thunderstorm warning in 2016

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.