Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 113, NWS Billings, MT

July 2, 2001Musselshell County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 2, 2001, 2:14 AM MDT for Musselshell County, Montana. It was in force for 61 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, 2:14 AM MDT (08:14 UTC)
Expired: Jul 2, 2001, 3:15 AM MDT
In force: 61 min
Issued by: NWS Billings, MT
Area: Whole counties

County Musselshell County, MT

The radar

The Billings radar (KBLX), 73 km from the middle of the area, began a volume at 08:13 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, 3:10 AM MDT	Hail 0.88	Roundup, 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, 8.2 hours before the alert went out and 198 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

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KBYZ 020815
SVRBIL

MTC065-020915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
214 AM MDT MON JUL 2 2001

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MUSSELSHELL COUNTY IN CENTRAL MONTANA

* UNTIL 315 AM MDT

* AT 214 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL 22 MILES WEST OF DELPHIA...OR
  ABOUT 11 MILES NORTHWEST OF ROUNDUP...MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS.   

THIS WARNING REPLACES THE WARNING FOR NORTHEAST GOLDEN VALLEY AND 
NORTHWEST MUSSELSHELL COUNTIES.
$$
MIDDENDORF
LAT...LON 4667 10877 4649 10879 4649 10818 4668 10811

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 1, 8:50 PM MDT, 5 hours 24 minutes earlier.

Area forecast discussion, Jul 1, 8:50 PM MDT, 5 hours 24 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
850 PM MDT SUN JUL 1 2001

.MON AND TUE...
SEVERE THUNDERSTORM WATCH GOING UNTIL MIDNIGHT. SHORTWAVE TRACKING INTO
THE AREA NOW WITH ANOTHER WAVE BEHIND IT IN IDAHO. STORMS HAVE RISEN
AND THEN FALLEN THE LAST COUPLE OF HOURS. CAP A LITTLE TOO STRONG AT THE
MOMENT. AS STORMS CONTINUE TO FIRE OVER THE MOUNTAINS...THIS SHOULD AID
IN CAP EROSION AND ALLOW FOR AN EASTWARD PROGRESSION. DEWPOINTS IN THE
60S ALMOST EVERYWHERE WITH MID 60S AT BILLINGS. SHEAR STILL SUPPORTS
SUPERCELLS. FRONTAL BOUNDARY LAYING OVER SOUTHERN MONTANA TO INTERACT
WITH. LIKE THE IDEA OF THE WATCH AND FEEL THINGS WILL CONTINUE TO
DEVELOP THIS EVENING...THEN SHIFT EAST OVERNIGHT. NEXT UPSTREAM WAVE
COULD MAKE FOR ANOTHER LONG NIGHT. INSTABILITY TAPERS OFF OVER THE
EXTREME EAST...SO STORMS SHOULD DECREASE OVER THE LAST TWO EASTERN
COUNTIES. CURRENT FORECAST LOOKS GOOD. HUMPHREY

.WED...THU...FRI...SAT...SUN...
RIDGE WILL BE OVER THE AREA WEDNESDAY AND THURSDAY...BUT 00Z AND 12Z
AVN/MRF INDICATE A SHORT WAVE WILL BRIEFLY KNOCK THE RIDGE DOWN
ON FRIDAY.  WILL THEREFORE INTRODUCE CHANCE POPS TO CENTRAL AND
EASTERN ZONES WHERE GREATEST INSTABILITY WILL EXIST.  RIDGE SHOULD
RETURN FOR SATURDAY AND SUNDAY.  WITH THE RIDGE OVERHEAD...TEMPS WILL
BE A FEW DEGREES ABOVE NORMAL.  MOORE

    MON     TUE     WED     THU     FRI     SAT     SUN
-----------------------------------------------------------
BIL 061/092 060/091 057/088 057/090 054/087 059/087 056/089
    42/T    20/B    01/B    20/B    33/T    11/B    11/B
LVM 057/090 058/091 053/088 052/087 050/087 055/087 056/088
    40/B    00/B    01/B    20/B    22/B    11/B    11/B
HDN 059/094 058/093 055/090 053/088 051/088 063/090 062/090
    42/T    20/B    01/B    20/B    33/T    11/B    11/B
MLS 058/090 058/090 059/087 055/086 054/085 059/085 059/086
    33/T    20/B    01/B    00/B    33/T    11/B    11/B
4BQ 057/089 057/090 057/086 054/084 053/084 058/088 058/089
    33/T    20/B    01/B    00/B    33/T    11/B    11/B
BHK 056/087 056/088 055/085 053/085 052/083 054/083 054/085
    33/T    20/B    01/B    00/B    33/T    11/B    11/B
SHR 057/091 056/091 052/088 051/086 050/086 051/086 052/086
    22/T    22/T    01/B    00/B    33/T    11/B    11/B

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, 5:20 AM MDT	Severe Thunderstorm Warning	BYZ	Treasure	40 min
Jul 2, 5:36 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	54 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.