Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 57, NWS Billings, MT

June 29, 2002Park County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 29, 2002, 1:50 PM MDT for Park 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: Jun 29, 2002, 1:50 PM MDT (19:50 UTC)
Expired: Jun 29, 2002, 2:45 PM MDT
In force: 55 min
Issued by: NWS Billings, MT
Area: Counties, with a storm outline in the text

County Park County, MT

The radar

The Billings radar (KBLX), 155 km from the middle of the area, began a volume at 19:52 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

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 7.8 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: 80 J/kg
Mixed-layer CIN: -468 J/kg
Mixed-layer LCL: 2641 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 89 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 Jun 29, 9:28 AM MDT, 4 hours 22 minutes earlier.

Area forecast discussion, Jun 29, 9:28 AM MDT, 4 hours 22 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
928 AM MDT SAT JUN 29 2002

.SHORT TERM...VALID FOR TDY...SUN...MON...
CHANGES TO ZFP...AND TO AFP. ACTIVE DAY SETTING UP FOR MONTANA AS
WATER VAPOR IMAGERY SHOWING SHORTWAVE TROUGH PUSHING THROUGH PACIFIC
NORTHWEST AND HEADING TOWARD MONTANA. BY AFTERNOON COLD FRONT WILL BEGIN
PUSHING THROUGH CWA...AND WILL RESULT IN BOTH SEVERE AND FIRE WX
CONCERNS. SOME STORMS WILL DEVELOP AHEAD OF COLD FRONT IN STRONG LIFT AS
THE CAP ERODES. WILL TWEAK POPS SOME...AND WILL LEAVE IN SEVERE MENTION
EAST OF BILLINGS...AS MAIN THREAT FROM THESE STORMS IN SOUTHERN MONTANA
WILL BE STRONG WINDS...WITH LARGE DEW POINT DEPRESSIONS AND VERY HIGH
WET BULB ZERO HEIGHTS. THE STORMS SHOULD CLEAR OUT OF EASTERN ZONES BY
LATE EVENING AS COLD FRONT PUSHES EAST. STRONG NORTHWEST WINDS WILL
DEVELOP BEHIND COLD FRONT AND INTENSIFYING SURFACE LOW ACROSS CENTRAL
AND EASTERN ZONES LATE THIS AFTERNOON INTO TONIGHT. WILL BUMP WINDS A
LITTLE HIGHER IN CENTRAL ZONES THROUGH LATE THIS EVENING...WHILE WINDS
WILL STAY UP MOST OF THE NIGHT IN THE EAST. JZ

.LONG TERM...VALID FOR TUE...WED...THU...FRI...

LARGE TROUGH OFF THE PACIFIC NORTHWEST COAST WILL PROVIDE FOR A
SOUTHWEST FLOW ALOFT...RESULTING IN UNSETTLED WEATHER THROUGH FRIDAY. IN
ADDITION...A FEW WAVES WILL KICK EASTWARD OUT OF THE TROUGH. THIS IS A
FAVORABLE PATTERN FOR THUNDERSTORM ACTIVITY. AS IS THE CASE WITH THIS
TYPE OF PATTERN...TIMING AND EXACT PLACEMENT OF WAVES IS UNCERTAIN.
THEREFORE...WILL LEAVE CURRENT PACKAGE AS IS AND MAKE NO CHANGES AT THIS
TIME. HOOLEY

    TDY SUN     MON     TUE     WED     THU     FRI
-------------------------------------------------------
BIL 092 059/088 059/086 055/080 056/083 057/084 055/083
    3/T 20/B    00/B    00/B    03/T    33/T    33/T
LVM 085 055/087 057/085 051/077 052/080 054/082 052/081
    4/T 20/B    00/B    00/B    03/T    33/T    33/T
HDN 096 057/089 057/087 053/082 054/085 055/086 054/085
    3/T 20/B    00/B    00/B    03/T    33/T    33/T
MLS 104 064/088 062/086 056/082 057/086 058/087 057/086
    2/T 30/B    00/B    00/B    03/T    33/T    33/T
4BQ 102 059/086 060/084 055/081 056/085 057/086 055/085
    1/G 30/B    00/B    00/B    03/T    33/T    33/T
BHK 103 059/087 057/085 054/079 054/083 055/084 053/083
    2/T 30/B    00/B    00/B    03/T    33/T    33/T
SHR 098 057/089 055/087 052/081 052/083 053/083 052/082
    2/T 30/B    00/B    00/B    03/T    33/T    33/T

.BYZ...
MT...NONE.
WY...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 6:53 PM MDT	Severe Thunderstorm Warning	BYZ	Park	52 min
Jun 28, 7:07 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	53 min
Jun 28, 10:10 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	65 min
Jun 29, 2:36 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	54 min
Jun 29, 2:42 PM MDT	Severe Thunderstorm Warning	BYZ	Sweet Grass	33 min
Jun 29, 3:13 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	32 min
Jun 29, 5:10 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Custer, Powder River, Rosebud	65 min
Jun 29, 5:44 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	61 min
Jun 29, 5:33 PM MDT	Severe Thunderstorm Warning	BYZ	Sheridan	57 min

Nearby

Severe Thunderstorm Warnings in Montana, 2002 Every severe thunderstorm warning in 2002

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.