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 461
NWS Storm Prediction Center Norman OK
1020 PM CDT Thu Aug 27 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern North Dakota
Central and Eastern South Dakota
* Effective this Thursday night and Friday morning from 1020 PM
until 500 AM CDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...Storms over western South Dakota at mid/late evening are
expected to organize and accelerate eastward through the late
evening and overnight hours with an increasing risk for wind damage
and wind-driven hail across central into eastern South Dakota, and
possibly southern North Dakota.
The severe thunderstorm watch area is approximately along and 105
statute miles north and south of a line from 20 miles north of
Pierre SD to 30 miles north northeast of Brookings 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 460...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
28040.
...Guyer
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 461
NWS Storm Prediction Center Norman OK
1020 PM CDT Thu Aug 27 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern North Dakota
Central and Eastern South Dakota
* Effective this Thursday night and Friday morning from 1020 PM
until 500 AM CDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...Storms over western South Dakota at mid/late evening are
expected to organize and accelerate eastward through the late
evening and overnight hours with an increasing risk for wind damage
and wind-driven hail across central into eastern South Dakota, and
possibly southern North Dakota.
The severe thunderstorm watch area is approximately along and 105
statute miles north and south of a line from 20 miles north of
Pierre SD to 30 miles north northeast of Brookings 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 460...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
28040.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 461 SEVERE TSTM ND SD 280320Z - 281000Z
AXIS..105 STATUTE MILES NORTH AND SOUTH OF LINE..
20N PIR/PIERRE SD/ - 30NNE BKX/BROOKINGS SD/
..AVIATION COORDS.. 90NM N/S /17NNW PIR - 64N FSD/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 28040.
LAT...LON 46190028 46229659 43189659 43150028
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 461 Status Report Messages:
STATUS REPORT #3 ON WW 461
VALID 280750Z - 280840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 NNW YKN
TO 25 NNE BKX TO 10 SSE VVV.
THE SEVERE BOW ECHO HAS MOSTLY MOVED INTO SEVERE THUNDERSTORM WATCH
462. SOME STRONG TO SEVERE GUSTS MAY STILL OCCUR ACROSS TURNER,
LINCOLN MINNEHAHA, BROOKINGS AND DEUEL COUNTIES OVER THE NEXT HOUR,
BUT OVERALL SEVERE THREAT SHOULD DIMINISH BY 830Z FOR WW 461.
..LEITMAN..08/28/20
ATTN...WFO...BIS...FGF...FSD...ABR...
&&
STATUS REPORT FOR WS 461
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC011-039-083-099-101-125-280840-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BROOKINGS DEUEL LINCOLN
MINNEHAHA MOODY TURNER
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 461
VALID 280650Z - 280740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 N ONL TO
30 E HON TO 30 WSW ATY TO 35 WNW ATY TO 40 S FAR.
..LEITMAN..08/28/20
ATTN...WFO...BIS...FGF...FSD...ABR...
&&
STATUS REPORT FOR WS 461
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC011-025-029-037-039-051-057-061-067-077-079-083-087-097-099-
101-109-125-280740-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BROOKINGS CLARK CODINGTON
DAY DEUEL GRANT
HAMLIN HANSON HUTCHINSON
KINGSBURY LAKE LINCOLN
MCCOOK MINER MINNEHAHA
MOODY ROBERTS TURNER
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 461
VALID 280540Z - 280640Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..LEITMAN..08/28/20
ATTN...WFO...BIS...FGF...FSD...ABR...
&&
STATUS REPORT FOR WS 461
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC021-029-051-081-280640-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
DICKEY EMMONS MCINTOSH
SARGENT
$$
SDC003-005-011-013-015-017-021-023-025-029-035-037-039-043-045-
049-051-053-057-059-061-065-067-069-073-077-079-083-085-087-089-
091-097-099-101-107-109-111-115-119-125-129-280640-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
AURORA BEADLE BROOKINGS
BROWN BRULE BUFFALO
CAMPBELL CHARLES MIX CLARK
CODINGTON DAVISON DAY
DEUEL DOUGLAS EDMUNDS
FAULK GRANT GREGORY
HAMLIN HAND HANSON
HUGHES HUTCHINSON HYDE
JERAULD KINGSBURY LAKE
LINCOLN LYMAN MCCOOK
MCPHERSON MARSHALL MINER
MINNEHAHA MOODY POTTER
ROBERTS SANBORN SPINK
SULLY TURNER WALWORTH
$$
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 (20%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (10%)
|
Wind
Probability of 10 or more severe wind events
|
High (70%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (50%)
|
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 (90%)
|
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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