Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL5
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 645
NWS Storm Prediction Center Norman OK
255 PM MDT Fri Aug 23 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and Central Montana
* Effective this Friday afternoon and evening from 255 PM until
900 PM MDT.
* Primary threats include...
Isolated significant damaging wind gusts to 75 mph possible
SUMMARY...Scattered thunderstorms will continue to develop and move
north-northeastward across the region through early evening, with
severe-caliber wind gusts a possibility.
The severe thunderstorm watch area is approximately along and 95
statute miles east and west of a line from 25 miles north of Cut
Bank MT to 40 miles south of Dillon MT. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU5).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 450. Mean storm motion vector
20030.
...Guyer
SEL5
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 645
NWS Storm Prediction Center Norman OK
255 PM MDT Fri Aug 23 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and Central Montana
* Effective this Friday afternoon and evening from 255 PM until
900 PM MDT.
* Primary threats include...
Isolated significant damaging wind gusts to 75 mph possible
SUMMARY...Scattered thunderstorms will continue to develop and move
north-northeastward across the region through early evening, with
severe-caliber wind gusts a possibility.
The severe thunderstorm watch area is approximately along and 95
statute miles east and west of a line from 25 miles north of Cut
Bank MT to 40 miles south of Dillon MT. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU5).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 450. Mean storm motion vector
20030.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW5
WW 645 SEVERE TSTM MT 232055Z - 240300Z
AXIS..95 STATUTE MILES EAST AND WEST OF LINE..
25N CTB/CUT BANK MT/ - 40S DLN/DILLON MT/
..AVIATION COORDS.. 80NM E/W /42SSE YQL - 35S DLN/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..65 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 20030.
LAT...LON 48961029 44651062 44651448 48961447
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU5.
Watch 645 Status Report Messages:
STATUS REPORT #2 ON WW 645
VALID 240010Z - 240140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NNW LVM
TO 25 SSW GTF TO 45 SSW CTB TO 40 SE GPI TO 35 SSW GPI.
..SPC..08/24/24
ATTN...WFO...TFX...MSO...
&&
STATUS REPORT FOR WS 645
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC005-013-015-027-029-035-041-045-051-053-059-073-099-101-
240140-
MT
. MONTANA COUNTIES INCLUDED ARE
BLAINE CASCADE CHOUTEAU
FERGUS FLATHEAD GLACIER
HILL JUDITH BASIN LIBERTY
LINCOLN MEAGHER PONDERA
TETON TOOLE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 645
VALID 232225Z - 232340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..SPC..08/23/24
ATTN...WFO...TFX...MSO...
&&
STATUS REPORT FOR WS 645
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC001-005-007-013-015-023-027-029-031-035-039-041-043-045-047-
049-051-053-057-059-061-063-073-077-081-089-093-099-101-
232340-
MT
. MONTANA COUNTIES INCLUDED ARE
BEAVERHEAD BLAINE BROADWATER
CASCADE CHOUTEAU DEER LODGE
FERGUS FLATHEAD GALLATIN
GLACIER GRANITE HILL
JEFFERSON JUDITH BASIN LAKE
LEWIS AND CLARK LIBERTY LINCOLN
MADISON MEAGHER MINERAL
MISSOULA PONDERA POWELL
RAVALLI SANDERS SILVER BOW
TETON TOOLE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (<5%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Low (10%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
@NWSSPC
