Alert archive / Montana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 89, NWS Billings, MT

July 23, 2000Big Horn County, Rosebud County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 23, 2000, 8:50 PM MDT for Big Horn County, Rosebud County, Montana. It was in force for 60 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 23, 2000, 8:50 PM MDT (02:50 UTC)
Expired: Jul 23, 2000, 9:50 PM MDT
In force: 60 min
Issued by: NWS Billings, MT
Area: Whole counties

Counties Big Horn County, MT, Rosebud County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 2.8 hours before the alert went out and 269 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: 1642 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 3058 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

681 
WUUS55 KBYZ 240250
SVRBIL
MTC003-087-240345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
850 PM MDT SUN JUL 23 2000

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BIG HORN COUNTY IN SOUTH CENTRAL MONTANA

* UNTIL 950 PM MDT

* AT 846 PM MDT...SEVERE WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM WITH DAMAGING WINDS ALONG A LINE EXTENDING FROM 15    
  MILES NORTHEAST OF HARDIN TO 10 MILES SOUTHWEST OF CROW AGENCY.
  THE LINE OF STORMS WERE MOVING EAST TO SOUTEAST AT 40 MPH. THESE
  STORMS HAVE A HISTORY OF PRODUCING 60 TO 70 MPH WINDS.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
   BUSBY BY 920 PM MDT.
   KIRBY BY 930 PM MDT.

* REMEMBER...SEVERE THUNDERSTORMS CAN AND SOMETIMES DO PRODUCE       
  TORNADOS WITH LITTLE ADVANCE WARNING.

THIS WARNING REPLACES THE PREVIOUS WARNING FOR NORTHERN BIG HORN 
COUNTY.

$$

LAT...LON 4597 10738 4535 10770 4508 10681 4568 10673
          4569 10693 4586 10696

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 23, 8:15 PM MDT, 35 minutes earlier.

Area forecast discussion, Jul 23, 8:15 PM MDT, 35 minutes before

SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
815 PM MDT SUN JUL 23 2000

.MON AND TUE...

UPDATES FORTHCOMING.

STRONG THUNDERSTORMS ARE PRESENTLY OVER BIG HORN COUNTY AND ARE SHOWING
SIGNS OF TURNING RIGHT.  WILL BE RECONFIGURING THE ZONES FOR SEVERE
STORMS IN A LARGER AREA. WILL ALSO KEEP A MENTION OF ISOLATED STORMS
FROM BILLINGS WEST...BUT THESE SHOULD PETER OUT BEFORE MIDNIGHT. CHB

.WED...THU...AND FRI...
RIDGE SLOWLY SHIFTS EASTWARD ON WED WITH DISTURBANCES MOVING THROUGH
OVERALL FLOW ON THU AND FRI WITH THUNDERSTORMS DEVELOPING LATE IN THE
DAY THU AND FRI. MAIN ACTIVITY WILL BE CONFINED TO THE SOUTHEAST CORNER
ON FRI...AFTER RIDGE HAS SHIFTED AND THICKNESS VALUES HAVE FALLEN. WILL
TREND TEMPS ON A DOWNWARD PATTERN AFTER WED...YET KEEP READINGS AROUND
NORMAL. SPRINGER

BIL BBBTT 060/086 059/088 056/089 059/086 059/086 522000 54
LVM BBBTT 053/083 052/086 053/085 055/085 055/085 522000 54
HDN BBBTT 058/088 057/090 055/090 057/088 057/088 524000 54
MLS BBBTT 064/087 061/089 059/089 059/089 062/086 524000 54
4BQ BBBTT 061/085 059/087 056/090 058/090 058/088 524000 54
BHK BBBTT 058/082 051/085 055/088 057/088 057/085 524200 54
SHR BBBTT 055/086 053/088 054/089 054/089 054/087 523000 54

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 6:43 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Stillwater, Yellowstone	62 min
Jul 23, 7:45 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure, Yellowstone	60 min
Jul 23, 8:53 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	52 min
Jul 23, 9:10 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	65 min
Jul 23, 9:46 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	59 min
Jul 23, 10:47 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	58 min

Nearby

Severe Thunderstorm Warnings in Montana, 2000 Every severe thunderstorm warning in 2000

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.