Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 329
NWS Storm Prediction Center Norman OK
540 PM MDT Sat Jul 4 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Montana
* Effective this Saturday afternoon from 540 PM until Midnight
MDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Scattered thunderstorms, in the form of high-based
supercells and clusters, will form and move across eastern Montana
through early tonight. The storm environment will favor damaging
winds and large hail as the primary threats.
The severe thunderstorm watch area is approximately along and 80
statute miles east and west of a line from 60 miles north of Wolf
Point MT to 15 miles west southwest of Broadus MT. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 328...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26025.
...Thompson
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 329
NWS Storm Prediction Center Norman OK
540 PM MDT Sat Jul 4 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Montana
* Effective this Saturday afternoon from 540 PM until Midnight
MDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Scattered thunderstorms, in the form of high-based
supercells and clusters, will form and move across eastern Montana
through early tonight. The storm environment will favor damaging
winds and large hail as the primary threats.
The severe thunderstorm watch area is approximately along and 80
statute miles east and west of a line from 60 miles north of Wolf
Point MT to 15 miles west southwest of Broadus MT. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 328...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26025.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 329 SEVERE TSTM MT 042340Z - 050600Z
AXIS..80 STATUTE MILES EAST AND WEST OF LINE..
60N OLF/WOLF POINT MT/ - 15WSW 4BQ/BROADUS MT/
..AVIATION COORDS.. 70NM E/W /61NE GGW - 63S MLS/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26025.
LAT...LON 48950382 45330404 45330733 48950734
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 329 Status Report Messages:
STATUS REPORT #5 ON WW 329
VALID 050455Z - 050600Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SSE SDY
TO 25 E OLF TO 70 NNE OLF.
WW 329 WILL BE ALLOWED TO EXPIRE AT 050600Z.
..SMITH..07/05/20
ATTN...WFO...BYZ...GGW...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC083-085-091-050600-
MT
. MONTANA COUNTIES INCLUDED ARE
RICHLAND ROOSEVELT SHERIDAN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 329
VALID 050400Z - 050440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 ESE GDV
TO 35 SSW OLF TO 55 NNE GGW.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1105
..SMITH..07/05/20
ATTN...WFO...BYZ...GGW...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC019-021-055-083-085-091-105-109-050440-
MT
. MONTANA COUNTIES INCLUDED ARE
DANIELS DAWSON MCCONE
RICHLAND ROOSEVELT SHERIDAN
VALLEY WIBAUX
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 329
VALID 050255Z - 050340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 SSW 2WX
TO 20 NE 4BQ TO 50 WNW MLS TO 55 SW GGW TO 70 WNW GGW TO 85 NE
HVR.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1105
..MOORE..07/05/20
ATTN...WFO...BYZ...GGW...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC011-019-021-025-033-055-079-083-085-091-105-109-050340-
MT
. MONTANA COUNTIES INCLUDED ARE
CARTER DANIELS DAWSON
FALLON GARFIELD MCCONE
PRAIRIE RICHLAND ROOSEVELT
SHERIDAN VALLEY WIBAUX
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 329
VALID 050200Z - 050340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 NW GCC TO
65 ENE BIL TO 50 E LWT TO 35 ENE LWT TO 55 NNE HVR.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1103
..MOORE..07/05/20
ATTN...WFO...BYZ...GGW...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC011-017-019-021-025-033-055-069-071-075-079-083-085-087-091-
105-109-050340-
MT
. MONTANA COUNTIES INCLUDED ARE
CARTER CUSTER DANIELS
DAWSON FALLON GARFIELD
MCCONE PETROLEUM PHILLIPS
POWDER RIVER PRAIRIE RICHLAND
ROOSEVELT ROSEBUD SHERIDAN
VALLEY WIBAUX
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 329
VALID 050035Z - 050140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 W SHR TO
45 N BIL TO 25 NNW LWT TO 35 SSE HVR TO 45 NNE HVR.
..MOORE..07/05/20
ATTN...WFO...BYZ...GGW...
&&
STATUS REPORT FOR WS 329
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC011-017-019-021-025-033-055-069-071-075-079-083-085-087-091-
105-109-050140-
MT
. MONTANA COUNTIES INCLUDED ARE
CARTER CUSTER DANIELS
DAWSON FALLON GARFIELD
MCCONE PETROLEUM PHILLIPS
POWDER RIVER PRAIRIE RICHLAND
ROOSEVELT ROSEBUD SHERIDAN
VALLEY WIBAUX
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (20%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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 
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