Alert archive / Montana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 41, NWS Billings, MT

July 3, 2000Custer County, Fallon County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 3, 2000, 9:06 PM MDT for Custer County, Fallon County, Montana. It was in force for 54 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 3, 2000, 9:06 PM MDT (03:06 UTC)
Expired
Jul 3, 2000, 10:00 PM MDT
In force
54 min
Issued by
NWS Billings, MT
Area
Whole counties

Counties Custer County, MT, Fallon County, MT

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 3, 9:00 PM MDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.1 hours before the alert went out and 246 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-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2000-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1264 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2000-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1264 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1591 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
267 m²/s²
Significant tornado parameter
0.3
Supercell composite
7.6

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KBYZ 040308
SVRBIL
MTC017-025-040400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
906 PM MDT MON JUL 3 2000

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL CUSTER COUNTY IN SOUTHEAST MONTANA
  NORTHWESTERN FALLON COUNTY IN SOUTHEAST MONTANA

* UNTIL 1000 PM MDT

* AT 906 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER MIZPAH...OR ABOUT 29 MILES EAST OF MILES
  CITY...MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF...
  EASTERN CUSTER...WESTERN FALLON AND NORTHEASTERN CUSTER COUNTIES.

LARGE HAIL...DAMAGING WINDS...BRIEF HEAVY RAIN...AND FREQUENT 
LIGHTNING ARE POSSIBLE WITH THIS STORM. IF THREATENING WEATHER 
APPROACHES...SEEK SHELTER AT ONCE. PLEASE REPORT INSTANCES OF SEVERE 
WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY FOR RELAY TO THE 
NATIONAL WEATHER SERVICE.

$$

LAT...LON 4629 10541 4617 10522 4653 10460 4672 10488
CHB

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 3, 8:47 PM MDT, 19 minutes earlier.

Area forecast discussion, Jul 3, 8:47 PM MDT, 19 minutes before
SOUTH CENTRAL AND SOUTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
847 PM MDT MON JUL 3 2000

.TUE AND WED...
WITH ONGOING SEVERE WEATHER AND ANOTHER SEVERE THUNDERSTORM WATCH BOX
UNTIL 200 AM...HAVE NOT HAD TIME TO LOOK AT NEW MODEL DATA.  WILL
UPDATE AND RECONFIGURE ZONES FOR THE NEW SEVERE THUNDERSTORM WATCH.
STROBIN

.THU...FRI...AND SAT...
WARM PATTERN LOOKS TO CONTINUE ACROSS SOUTHERN MONTANA DURING THE
PERIOD. ALL MODELS INDICATING ONE MORE DAY OF SOUTHWEST FLOW ON
THURSDAY...THUS WILL LEAVE IN CHANCE OF THUNDERSTORMS. MRF AND ETA
700MB TEMPERATURES ARE ROUGHLY 8 TO 12 DEGREES...WHILE AVN IS A COUPLE
OF DEGREES WARMER. SINCE AVN IS HAVING PROBLEMS HANDLING TODAYS
SITUATION...ESPECIALLY MOISTURE...WILL STICK MORE WITH THE ETA FOR
THURSDAY AND LOWER HIGH TEMPS A COUPLE DEGREES. FRIDAY SHORTWAVE TROUGH
OVER WEST COAST EJECTS OUT AND RIDES OVER TOP OF THE RIDGE IN PLACE OVER
THE CENTRAL US AND IS QUICKLY REPLACED BY ANOTHER. THE TROUGH WILL ACT
TO BRING IN COOLER TEMPERATURES DUE TO SLIGHTLY COOLER MID LEVEL
TEMPS...BUT LOOKS TO BE TOO FAR NORTH TO BRING MUCH OF A CHANCE OF
PRECIPITATION TO THE CWA...SO WILL LEAVE FRIDAY DRY FOR NOW. SATURDAY
THE RIDGE BEGINS TO BUILD BACK IN TO THE AREA...WITH DRY NORTHWESTERLY
FLOW AND WARMING TEMPERATURES...DEPENDING ON WHETHER ECMWF OR MRF IS TO
BE FOLLOWED. ECMWF IS OLDER.  WILL FOLLOW THE NEWER MRF THIS TIME.
JZ/CHB

BIL TTTBB 059/079 055/084 058/087 057/086 058/089 634443 52
LVM TTTBB 054/078 052/083 055/085 055/084 056/087 634443 52
HDN TTTBB 058/081 053/086 058/088 055/087 057/090 634443 52
MLS TTTBB 063/085 057/088 061/090 060/088 059/090 634443 52
4BQ TTTBB 062/086 057/089 060/092 060/089 060/091 634443 52
BHK TTTBB 061/084 056/087 060/091 059/087 059/088 634443 52
SHR TTTBB 056/080 051/085 055/089 055/087 056/090 634443 52

In the hours before

Special weather statement, Jul 3, 6:25 PM MDT, 2 hours 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
625 PM MDT MON JUL 3 2000

MTZ028>029-034>035-038>042-030200-
GOLDEN VALLEY-MUSSELSHELL-BIG HORN-ROSEBUD-CARTER-CUSTER-
CARBON-TREASURE-FALLON-POWDER RIVER-YELLOWSTONE-STILLWATER-PARK-
SWEET GRASS-WHEATLAND-
625 PM MDT MON JUL 3 2000

...SEVERE THUNDERSTORM WATCH CANCELLED FOR BIG HORN...
CARBON...GOLDEN VALLEY...MUSSELSHELL...PARK...STILLWATER...SWEET
GRASS...WHEATLAND...AND YELLOWSTONE COUNTIES...

THUNDERSTORMS HAVE DIMINISHED TO BELOW SEVERE CRITERIA OVER SOUTHERN
MONTANA. AS A RESULT THE SEVERE THUNDERSTORM WATCH HAS BEEN
CANCELLED FOR THESE COUNTIES. SCATTERED SHOWERS AND THUNDERSTORMS
WILL CONGTINUE OVER SOUTHERN MONTANA THIS EVENING BUT ARE NOT EXPECTED TO
BE SEVERE.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 8:08 PM MDTSevere Thunderstorm WarningBYZCuster67 min
Jul 3, 8:13 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure62 min
Jul 4, 12:06 AM MDTSevere Thunderstorm WarningBYZCuster54 min
Jul 4, 1:51 PM MDTSevere Thunderstorm WarningBYZCarbon, Stillwater, Yellowstone54 min
Jul 4, 2:05 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Musselshell55 min
Jul 4, 2:52 PM MDTSevere Thunderstorm WarningBYZYellowstone53 min
Jul 4, 3:35 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure55 min
Jul 4, 3:39 PM MDTSevere Thunderstorm WarningBYZYellowstone36 min
Jul 4, 4:23 PM MDTSevere Thunderstorm WarningBYZPowder River67 min
Jul 4, 4:32 PM MDTSevere Thunderstorm WarningBYZYellowstone43 min
Jul 4, 4:33 PM MDTSevere Thunderstorm WarningBYZRosebud57 min
Jul 4, 4:38 PM MDTSevere Thunderstorm WarningBYZPowder River67 min
Jul 4, 4:57 PM MDTTornado WarningBYZYellowstone33 min
Jul 4, 5:30 PM MDTSevere Thunderstorm WarningBYZCarter, Powder River60 min
Jul 4, 5:40 PM MDTSevere Thunderstorm WarningBYZCuster65 min

Nearby

Severe Thunderstorm Warnings in Montana, 2000Every 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.