Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 23, NWS Billings, MT

June 9, 2001Powder River County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 9, 2001, 1:16 AM MDT for Powder River County, Montana. It was in force for 59 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 9, 2001, 1:16 AM MDT (07:16 UTC)
Expired: Jun 9, 2001, 2:15 AM MDT
In force: 59 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 07:20 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.

What was reported inside it

Time	Report	Where	Remark
Jun 9, 1:20 AM MDT	Hail 0.88	Sonnette, MT

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 7.3 hours before the alert went out and 262 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: 1061 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1371 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 8, 8:18 PM MDT, 4 hours 58 minutes earlier.

Area forecast discussion, Jun 8, 8:18 PM MDT, 4 hours 58 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
818 PM MDT FRI JUN 8 2001

.SAT AND SUN...
FORECAST HAS BEEN UPDATED TO INCLUDE SEVERE THUNDERSTORM WATCH FROM
MUSSELSHELL COUNTY SSE TO SHERIDAN COUNTY WY EAST. ONLY FALLON COUNTY
IS NOT IN THE WATCH BOX. WAVE MOVING ACROSS THE STATE...COMBINED WITH
STRONG INSTABILITY...WILL CONTINUE THE CONVECTION OVERNIGHT. STROBIN

.MON...TUE...WED...THU...FRI...
MODELS IN GENERAL AGREEMENT IN BRINGING A SIGNIFICANT TROUGH EARLY NEXT
WEEK WITH CHANCES OF THUNDERSTORMS AND SHOWERS MONDAY AND TUESDAY. THIS
SYSTEM WILL BRING COLDER TEMPERATURES TO THE AREA WITH GUSTY WINDS AS
THE SYSTEM MOVES THROUGH THE AREA. WEAK RIDGING THEN FORMS OVER THE
NORTHERN ROCKIES WEDNESDAY THROUGH THE END OF THE WEEK FOR SLOW WARMING
AND GENERALLY DRY CONDITIONS. THORICHT

    SAT     SUN     MON     TUE     WED     THU     FRI
-----------------------------------------------------------
BIL 055/087 058/086 054/077 047/064 044/066 047/072 049/077
    43/T    22/T    44/T    43/W    22/B    22/B    22/U
LVM 050/082 049/080 052/074 045/061 041/064 045/070 047/075
    43/T    22/T    44/T    43/W    22/B    22/B    22/U
HDN 054/088 055/089 055/077 045/065 044/067 046/072 048/076
    43/T    22/T    44/T    43/W    22/B    22/B    22/U
MLS 058/089 057/089 057/077 049/067 044/067 049/074 049/076
    44/T    43/T    44/T    43/W    22/E    22/B    22/U
4BQ 057/089 056/088 056/077 046/065 042/065 047/075 048/073
    44/T    43/T    44/T    43/W    22/E    22/B    22/U
BHK 055/085 057/086 055/077 044/063 040/065 045/072 046/071
    44/T    43/T    44/T    43/W    22/E    22/B    2x2/U
SHR 050/086 052/087 052/074 040/063 039/064 041/068 044/076
    43/T    22/T    44/T    43/W    22/E    22/B    22/U

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 6:16 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	29 min
Jun 8, 7:12 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Yellowstone	48 min
Jun 8, 7:57 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	63 min
Jun 8, 8:36 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	54 min
Jun 8, 11:16 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	44 min
Jun 8, 11:19 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	41 min
Jun 9, 12:54 AM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	66 min
Jun 9, 3:14 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	61 min

Nearby

Severe Thunderstorm Warnings in Montana, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.