Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 434
NWS Storm Prediction Center Norman OK
1250 AM CDT Fri Aug 14 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern North Dakota
Extreme north central South Dakota
* Effective this Friday morning from 1250 AM until 800 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter likely
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
SUMMARY...A cluster of severe storms, including bowing segments and
some embedded supercell structures, will persist overnight while
moving eastward over southern North Dakota and adjacent northern
South Dakota. The storms will be capable of producing damaging
winds and large hail through the early morning hours.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 35 miles south of
Dickinson ND to 40 miles south southeast of Jamestown ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
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 433...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
27040.
...Thompson
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 434
NWS Storm Prediction Center Norman OK
1250 AM CDT Fri Aug 14 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern North Dakota
Extreme north central South Dakota
* Effective this Friday morning from 1250 AM until 800 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter likely
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
SUMMARY...A cluster of severe storms, including bowing segments and
some embedded supercell structures, will persist overnight while
moving eastward over southern North Dakota and adjacent northern
South Dakota. The storms will be capable of producing damaging
winds and large hail through the early morning hours.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 35 miles south of
Dickinson ND to 40 miles south southeast of Jamestown ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
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 433...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
27040.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 434 SEVERE TSTM ND SD 140550Z - 141300Z
AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE..
35S DIK/DICKINSON ND/ - 40SSE JMS/JAMESTOWN ND/
..AVIATION COORDS.. 35NM N/S /34S DIK - 59N ABR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 27040.
LAT...LON 46870280 46979836 45829836 45710280
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 434 Status Report Messages:
STATUS REPORT #7 ON WW 434
VALID 141235Z - 141340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 E MBG TO
45 NE MBG TO 25 SE BIS TO 25 ESE BIS TO 45 NW JMS.
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC021-029-043-045-047-051-093-141340-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
DICKEY EMMONS KIDDER
LAMOURE LOGAN MCINTOSH
STUTSMAN
$$
SDC089-141340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
MCPHERSON
$$
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.
$$
STATUS REPORT #6 ON WW 434
VALID 141135Z - 141240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 E MBG TO
35 NNW MBG TO 40 SSE BIS TO 25 SE BIS TO 10 E BIS TO 25 ENE BIS
TO 60 NE BIS.
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC015-021-029-043-045-047-051-093-141240-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BURLEIGH DICKEY EMMONS
KIDDER LAMOURE LOGAN
MCINTOSH STUTSMAN
$$
SDC021-089-141240-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL MCPHERSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #5 ON WW 434
VALID 141025Z - 141140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 W MBG TO
35 E Y22 TO 35 NNE Y22 TO 30 SSW N60.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1484
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC015-021-029-037-043-045-047-051-059-085-093-141140-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BURLEIGH DICKEY EMMONS
GRANT KIDDER LAMOURE
LOGAN MCINTOSH MORTON
SIOUX STUTSMAN
$$
SDC021-031-089-141140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON MCPHERSON
$$
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.
$$
STATUS REPORT #4 ON WW 434
VALID 140940Z - 141040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SW Y22 TO
35 SSE DIK TO 35 N Y22 TO 35 SW N60.
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC001-015-021-029-037-041-043-045-047-051-059-085-093-141040-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BURLEIGH DICKEY
EMMONS GRANT HETTINGER
KIDDER LAMOURE LOGAN
MCINTOSH MORTON SIOUX
STUTSMAN
$$
SDC021-031-089-141040-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON MCPHERSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 434
VALID 140840Z - 140940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSW DIK
TO 35 N Y22 TO 40 SW N60.
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC001-015-021-029-037-041-043-045-047-051-059-085-093-140940-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BURLEIGH DICKEY
EMMONS GRANT HETTINGER
KIDDER LAMOURE LOGAN
MCINTOSH MORTON SIOUX
STUTSMAN
$$
SDC021-031-089-140940-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON MCPHERSON
$$
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.
$$
STATUS REPORT #2 ON WW 434
VALID 140745Z - 140840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSW DIK
TO 35 N Y22 TO 45 NE DIK.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1482
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC001-015-021-029-037-041-043-045-047-051-059-085-093-140840-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BURLEIGH DICKEY
EMMONS GRANT HETTINGER
KIDDER LAMOURE LOGAN
MCINTOSH MORTON SIOUX
STUTSMAN
$$
SDC021-031-089-140840-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON MCPHERSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 434
VALID 140645Z - 140740Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GLEASON..08/14/20
ATTN...WFO...BIS...ABR...
&&
STATUS REPORT FOR WS 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC001-015-021-029-037-041-043-045-047-051-059-085-089-093-
140740-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BURLEIGH DICKEY
EMMONS GRANT HETTINGER
KIDDER LAMOURE LOGAN
MCINTOSH MORTON SIOUX
STARK STUTSMAN
$$
SDC021-031-089-140740-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON MCPHERSON
$$
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 (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (60%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (60%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
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.