Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 341
NWS Storm Prediction Center Norman OK
720 PM MDT Tue Jul 7 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
North central South Dakota
* Effective this Tuesday night from 720 PM until Midnight MDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...A cluster of storms east of Rapid City will continue to
spread northeastward through early tonight. The stronger embedded
storms, which could have supercell structures, will be capable of
producing damaging winds and isolated large hail.
The severe thunderstorm watch area is approximately along and 35
statute miles east and west of a line from 40 miles northwest of
Mobridge SD to 70 miles south of Mobridge SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
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 338...WW 339...WW 340...
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
23035.
...Thompson
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 341
NWS Storm Prediction Center Norman OK
720 PM MDT Tue Jul 7 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
North central South Dakota
* Effective this Tuesday night from 720 PM until Midnight MDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...A cluster of storms east of Rapid City will continue to
spread northeastward through early tonight. The stronger embedded
storms, which could have supercell structures, will be capable of
producing damaging winds and isolated large hail.
The severe thunderstorm watch area is approximately along and 35
statute miles east and west of a line from 40 miles northwest of
Mobridge SD to 70 miles south of Mobridge SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).
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 338...WW 339...WW 340...
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
23035.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 341 SEVERE TSTM SD 080120Z - 080600Z
AXIS..35 STATUTE MILES EAST AND WEST OF LINE..
40NW MBG/MOBRIDGE SD/ - 70S MBG/MOBRIDGE SD/
..AVIATION COORDS.. 30NM E/W /52SSW BIS - 13WNW PIR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 23035.
LAT...LON 45940029 44519972 44510114 45940175
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 341 Status Report Messages:
STATUS REPORT #2 ON WW 341
VALID 080415Z - 080540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NW PIR TO
10 SSE MBG TO 40 SE Y22.
..DIAL..07/08/20
ATTN...WFO...ABR...
&&
STATUS REPORT FOR WS 341
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC021-031-107-119-129-080540-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON POTTER
SULLY WALWORTH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 341
VALID 080215Z - 080340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 ESE PHP
TO 15 N Y22.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1135
..MOORE..07/08/20
ATTN...WFO...ABR...
&&
STATUS REPORT FOR WS 341
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC021-031-041-107-117-119-129-080340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
CAMPBELL CORSON DEWEY
POTTER STANLEY SULLY
WALWORTH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (30%)
|
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 (70%)
|
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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