Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 327
NWS Storm Prediction Center Norman OK
530 PM MDT Fri Jul 3 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Montana
Extreme western North Dakota
Extreme northwestern South Dakota
* Effective this Friday afternoon and Saturday morning from 530
PM until 100 AM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Scattered thunderstorms are forming across southeast
Montana, and additional development is expected through this evening
across eastern Montana. The storm environment will favor both
supercells and organized clusters capable of producing large hail
and damaging winds. A cluster or two of storms could move into
northwestern South Dakota and western North Dakota during the early
overnight hours.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 55 miles north northeast
of Wolf Point MT to 25 miles southeast of Broadus MT. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).
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
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
26020.
...Thompson
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 327
NWS Storm Prediction Center Norman OK
530 PM MDT Fri Jul 3 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Montana
Extreme western North Dakota
Extreme northwestern South Dakota
* Effective this Friday afternoon and Saturday morning from 530
PM until 100 AM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Scattered thunderstorms are forming across southeast
Montana, and additional development is expected through this evening
across eastern Montana. The storm environment will favor both
supercells and organized clusters capable of producing large hail
and damaging winds. A cluster or two of storms could move into
northwestern South Dakota and western North Dakota during the early
overnight hours.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 55 miles north northeast
of Wolf Point MT to 25 miles southeast of Broadus MT. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).
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
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
26020.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 327 SEVERE TSTM MT ND SD 032330Z - 040700Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
55NNE OLF/WOLF POINT MT/ - 25SE 4BQ/BROADUS MT/
..AVIATION COORDS.. 75NM E/W /71ENE GGW - 82SSE MLS/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 26020.
LAT...LON 48820325 45160329 45160678 48820699
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 327 Status Report Messages:
STATUS REPORT #5 ON WW 327
VALID 040550Z - 040640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 ENE 2WX
TO 35 NNW 2WX TO 40 E BHK TO 25 WNW DIK TO 25 NE ISN TO 50 NNE
ISN TO 45 NNW ISN TO 45 NW ISN TO 35 NE OLF TO 55 N OLF.
..BROYLES..07/04/20
ATTN...WFO...BYZ...GGW...BIS...UNR...
&&
STATUS REPORT FOR WS 327
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC091-040640-
MT
. MONTANA COUNTIES INCLUDED ARE
SHERIDAN
$$
NDC011-040640-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BOWMAN
$$
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.
$$
STATUS REPORT #4 ON WW 327
VALID 040400Z - 040440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE 2WX TO
30 SSE BHK TO 15 E SDY TO 60 NW ISN.
..SMITH..07/04/20
ATTN...WFO...BYZ...GGW...BIS...UNR...
&&
STATUS REPORT FOR WS 327
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC091-040440-
MT
. MONTANA COUNTIES INCLUDED ARE
SHERIDAN
$$
NDC007-011-023-033-053-087-105-040440-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BILLINGS BOWMAN DIVIDE
GOLDEN VALLEY MCKENZIE SLOPE
WILLIAMS
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 327
VALID 040220Z - 040340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SSW 2WX
TO 40 WSW BHK TO 45 WNW GGW TO 85 NW GGW.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1095
..MOORE..07/04/20
ATTN...WFO...BYZ...GGW...BIS...UNR...
&&
STATUS REPORT FOR WS 327
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC019-021-025-055-079-083-085-091-105-109-040340-
MT
. MONTANA COUNTIES INCLUDED ARE
DANIELS DAWSON FALLON
MCCONE PRAIRIE RICHLAND
ROOSEVELT SHERIDAN VALLEY
WIBAUX
$$
NDC007-011-023-033-053-087-105-040340-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BILLINGS BOWMAN DIVIDE
GOLDEN VALLEY MCKENZIE SLOPE
WILLIAMS
$$
SDC063-040340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
HARDING
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 327
VALID 040140Z - 040240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSE 4BQ
TO 5 NNW 4BQ TO 40 W MLS TO 70 SW GGW TO 80 NW GGW.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1095
..MOORE..07/04/20
ATTN...WFO...BYZ...GGW...BIS...UNR...
&&
STATUS REPORT FOR WS 327
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC011-017-019-021-025-033-055-079-083-085-091-105-109-040240-
MT
. MONTANA COUNTIES INCLUDED ARE
CARTER CUSTER DANIELS
DAWSON FALLON GARFIELD
MCCONE PRAIRIE RICHLAND
ROOSEVELT SHERIDAN VALLEY
WIBAUX
$$
NDC007-011-023-033-053-087-105-040240-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BILLINGS BOWMAN DIVIDE
GOLDEN VALLEY MCKENZIE SLOPE
WILLIAMS
$$
SDC063-040240-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
HARDING
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 327
VALID 040025Z - 040140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 NE SHR TO
70 NNE BIL TO 85 NW GGW.
..MOORE..07/04/20
ATTN...WFO...BYZ...GGW...BIS...UNR...
&&
STATUS REPORT FOR WS 327
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC011-017-019-021-025-033-055-075-079-083-085-087-091-105-109-
040140-
MT
. MONTANA COUNTIES INCLUDED ARE
CARTER CUSTER DANIELS
DAWSON FALLON GARFIELD
MCCONE POWDER RIVER PRAIRIE
RICHLAND ROOSEVELT ROSEBUD
SHERIDAN VALLEY WIBAUX
$$
NDC007-011-023-033-053-087-105-040140-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BILLINGS BOWMAN DIVIDE
GOLDEN VALLEY MCKENZIE SLOPE
WILLIAMS
$$
SDC063-040140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
HARDING
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (<2%)
|
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 (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
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.
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