Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL3
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 423
NWS Storm Prediction Center Norman OK
1215 PM CDT Sun Aug 9 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northwest Minnesota
Eastern North Dakota
* Effective this Sunday afternoon and evening from 1215 PM until
700 PM CDT.
* 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
A tornado or two possible
SUMMARY...Strong to severe thunderstorms have initially formed
across northeast North Dakota, with additional storms expected to
develop through the afternoon farther south into southeast North
Dakota. This activity will spread east with embedded supercells and
line segments into northwest Minnesota through early evening.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 45 miles north of Thief
River Falls MN to 70 miles south southwest of Fargo ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU3).
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
28035.
...Grams
SEL3
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 423
NWS Storm Prediction Center Norman OK
1215 PM CDT Sun Aug 9 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northwest Minnesota
Eastern North Dakota
* Effective this Sunday afternoon and evening from 1215 PM until
700 PM CDT.
* 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
A tornado or two possible
SUMMARY...Strong to severe thunderstorms have initially formed
across northeast North Dakota, with additional storms expected to
develop through the afternoon farther south into southeast North
Dakota. This activity will spread east with embedded supercells and
line segments into northwest Minnesota through early evening.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 45 miles north of Thief
River Falls MN to 70 miles south southwest of Fargo ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU3).
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
28035.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW3
WW 423 SEVERE TSTM MN ND 091715Z - 100000Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
45N TVF/THIEF RIVER FALLS MN/ - 70SSW FAR/FARGO ND/
..AVIATION COORDS.. 75NM E/W /61NE GFK - 51SSW FAR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 28035.
LAT...LON 48719432 45979561 45979915 48719804
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.
Watch 423 Status Report Messages:
STATUS REPORT #4 ON WW 423
VALID 092220Z - 092340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NE ABR TO
20 S FAR TO 10 NE FAR TO 25 S TVF TO 45 SW INL.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1437
..DEAN..08/09/20
ATTN...WFO...FGF...BIS...
&&
STATUS REPORT FOR WS 423
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MNC005-007-027-029-051-057-087-111-119-159-167-092340-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BECKER BELTRAMI CLAY
CLEARWATER GRANT HUBBARD
MAHNOMEN OTTER TAIL POLK
WADENA WILKIN
$$
NDC077-081-092340-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
RICHLAND SARGENT
$$
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.
$$
STATUS REPORT #3 ON WW 423
VALID 092035Z - 092140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNW ABR
TO 40 SE JMS TO 30 NW FAR TO 10 SSE ROX.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1435
..MARSH..08/09/20
ATTN...WFO...FGF...BIS...
&&
STATUS REPORT FOR WS 423
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MNC005-007-027-029-051-057-077-087-089-107-111-113-119-125-135-
159-167-092140-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BECKER BELTRAMI CLAY
CLEARWATER GRANT HUBBARD
LAKE OF THE WOODS MAHNOMEN MARSHALL
NORMAN OTTER TAIL PENNINGTON
POLK RED LAKE ROSEAU
WADENA WILKIN
$$
NDC017-021-045-073-077-081-092140-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
CASS DICKEY LAMOURE
RANSOM RICHLAND SARGENT
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 423
VALID 091940Z - 092040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNW ABR
TO 20 S GFK TO 25 E HCO.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1435
..MARSH..08/09/20
ATTN...WFO...FGF...BIS...
&&
STATUS REPORT FOR WS 423
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MNC005-007-027-029-051-057-077-087-089-107-111-113-119-125-135-
159-167-092040-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BECKER BELTRAMI CLAY
CLEARWATER GRANT HUBBARD
LAKE OF THE WOODS MAHNOMEN MARSHALL
NORMAN OTTER TAIL PENNINGTON
POLK RED LAKE ROSEAU
WADENA WILKIN
$$
NDC003-017-021-045-073-077-081-097-092040-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BARNES CASS DICKEY
LAMOURE RANSOM RICHLAND
SARGENT TRAILL
$$
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.
$$
STATUS REPORT #1 ON WW 423
VALID 091835Z - 091940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MARSH..08/09/20
ATTN...WFO...FGF...BIS...
&&
STATUS REPORT FOR WS 423
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MNC005-007-027-029-051-057-069-077-087-089-107-111-113-119-125-
135-159-167-091940-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BECKER BELTRAMI CLAY
CLEARWATER GRANT HUBBARD
KITTSON LAKE OF THE WOODS MAHNOMEN
MARSHALL NORMAN OTTER TAIL
PENNINGTON POLK RED LAKE
ROSEAU WADENA WILKIN
$$
NDC003-017-021-035-039-045-047-051-063-067-073-077-081-091-093-
097-099-091940-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BARNES CASS DICKEY
GRAND FORKS GRIGGS LAMOURE
LOGAN MCINTOSH NELSON
PEMBINA RANSOM RICHLAND
SARGENT STEELE STUTSMAN
TRAILL WALSH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (20%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (10%)
|
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.
weather.gov 
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