Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 115, NWS Billings, MT

July 2, 2001Rosebud County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 2, 2001, 5:36 AM MDT for Rosebud County, Montana. It was in force for 54 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: Jul 2, 2001, 5:36 AM MDT (11:36 UTC)
Expired: Jul 2, 2001, 6:30 AM MDT
In force: 54 min
Issued by: NWS Billings, MT
Area: Whole counties

County Rosebud County, MT

The radar

The Billings radar (KBLX), 151 km from the middle of the area, began a volume at 11:39 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
Jul 2, 5:40 AM MDT	Hail 1.75	Vananda, 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

Great_falls, MT (KTFX), launched 00:00Z, 11.6 hours before the alert went out and 324 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: 490 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 2854 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Jul 2, 2:45 AM MDT, 2 hours 51 minutes earlier.

Area forecast discussion, Jul 2, 2:45 AM MDT, 2 hours 51 minutes before

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In the hours before

Local storm report, Jul 2, 4:13 AM MDT, 1 hour 23 minutes before

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    <section class="card" role="status" aria-live="polite">
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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 1, 9:07 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Sweet Grass	53 min
Jul 1, 9:18 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	57 min
Jul 1, 9:26 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley	49 min
Jul 1, 9:37 PM MDT	Flash Flood Warning	BYZ	Musselshell	15 hr
Jul 1, 10:15 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	60 min
Jul 2, 12:00 AM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	60 min
Jul 2, 12:16 AM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley	59 min
Jul 2, 12:25 AM MDT	Flash Flood Warning	BYZ	Musselshell	3 hr
Jul 2, 1:14 AM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	61 min
Jul 2, 2:14 AM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	61 min
Jul 2, 5:20 AM MDT	Severe Thunderstorm Warning	BYZ	Treasure	40 min
Jul 2, 6:31 AM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	59 min
Jul 2, 7:01 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud, Treasure	59 min
Jul 2, 7:11 AM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	49 min
Jul 2, 7:51 AM MDT	Severe Thunderstorm Warning	BYZ	Treasure	39 min
Jul 2, 8:12 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	63 min
Jul 2, 8:52 AM MDT	Severe Thunderstorm Warning	BYZ	Treasure	23 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.