Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 399
NWS Storm Prediction Center Norman OK
320 PM CDT Fri Jul 24 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
western and central Nebraska
central South Dakota
* Effective this Friday afternoon and evening from 320 PM until
1000 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 65 mph possible
SUMMARY...Isolated storms have developed across portions of western
South Dakota, and should increase with time across this area and
southward into Nebraska. As storms move northeastward through the
evening hours, large hail and locally damaging winds are expected.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 20 miles north northwest
of Mobridge SD to 35 miles west of North Platte NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
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 55 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
24035.
...Goss
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 399
NWS Storm Prediction Center Norman OK
320 PM CDT Fri Jul 24 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
western and central Nebraska
central South Dakota
* Effective this Friday afternoon and evening from 320 PM until
1000 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 65 mph possible
SUMMARY...Isolated storms have developed across portions of western
South Dakota, and should increase with time across this area and
southward into Nebraska. As storms move northeastward through the
evening hours, large hail and locally damaging winds are expected.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 20 miles north northwest
of Mobridge SD to 35 miles west of North Platte NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
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 55 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
24035.
...Goss
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 399 SEVERE TSTM NE SD 242020Z - 250300Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
20NNW MBG/MOBRIDGE SD/ - 35W LBF/NORTH PLATTE NE/
..AVIATION COORDS.. 50NM E/W /59S BIS - 29W LBF/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..55 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 24035.
LAT...LON 45799934 41120020 41120251 45790183
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 399 Status Report Messages:
STATUS REPORT #5 ON WW 399
VALID 250240Z - 250340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 WNW IML
TO 15 NE PIR TO 40 NE MBG.
..BROYLES..07/25/20
ATTN...WFO...LBF...UNR...ABR...
&&
STATUS REPORT FOR WS 399
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC009-017-091-103-111-113-117-135-171-250340-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BLAINE BROWN HOOKER
KEYA PAHA LINCOLN LOGAN
MCPHERSON PERKINS THOMAS
$$
SDC017-045-049-059-065-069-085-089-107-123-129-250340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUFFALO EDMUNDS FAULK
HAND HUGHES HYDE
LYMAN MCPHERSON POTTER
TRIPP WALWORTH
$$
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.
$$
STATUS REPORT #4 ON WW 399
VALID 250135Z - 250240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 W IML TO
50 SSW PIR TO 30 NE MBG.
..BROYLES..07/25/20
ATTN...WFO...LBF...UNR...ABR...
&&
STATUS REPORT FOR WS 399
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC009-017-031-091-101-103-111-113-117-135-171-250240-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BLAINE BROWN CHERRY
HOOKER KEITH KEYA PAHA
LINCOLN LOGAN MCPHERSON
PERKINS THOMAS
$$
SDC017-021-045-049-059-065-069-075-085-089-107-119-121-123-129-
250240-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUFFALO CAMPBELL EDMUNDS
FAULK HAND HUGHES
HYDE JONES LYMAN
MCPHERSON POTTER SULLY
TODD TRIPP 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 #3 ON WW 399
VALID 250040Z - 250140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 E SNY TO
45 W VTN TO 35 SE PHP TO 40 SW MBG TO 40 S BIS.
..BROYLES..07/25/20
ATTN...WFO...LBF...UNR...ABR...
&&
STATUS REPORT FOR WS 399
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC005-009-017-031-049-075-091-101-103-111-113-117-135-171-
250140-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BLAINE BROWN
CHERRY DEUEL GRANT
HOOKER KEITH KEYA PAHA
LINCOLN LOGAN MCPHERSON
PERKINS THOMAS
$$
SDC017-021-045-049-059-065-069-075-085-089-095-107-117-119-121-
123-129-250140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUFFALO CAMPBELL EDMUNDS
FAULK HAND HUGHES
HYDE JONES LYMAN
MCPHERSON MELLETTE POTTER
STANLEY SULLY TODD
TRIPP WALWORTH
$$
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.
$$
STATUS REPORT #2 ON WW 399
VALID 242340Z - 250040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SE AIA TO
50 WNW VTN TO 45 WNW PIR TO 45 E Y22.
..BROYLES..07/24/20
ATTN...WFO...LBF...UNR...ABR...
&&
STATUS REPORT FOR WS 399
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC005-009-017-031-049-069-075-091-101-103-111-113-117-135-171-
250040-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BLAINE BROWN
CHERRY DEUEL GARDEN
GRANT HOOKER KEITH
KEYA PAHA LINCOLN LOGAN
MCPHERSON PERKINS THOMAS
$$
SDC017-021-031-041-045-049-059-065-069-075-085-089-095-107-117-
119-121-123-129-250040-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUFFALO CAMPBELL CORSON
DEWEY EDMUNDS FAULK
HAND HUGHES HYDE
JONES LYMAN MCPHERSON
MELLETTE POTTER STANLEY
SULLY TODD TRIPP
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 399
VALID 242240Z - 242340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 ENE AIA
TO 60 E CDR TO 10 N PHP TO 30 ENE Y22.
..BROYLES..07/24/20
ATTN...WFO...LBF...UNR...ABR...
&&
STATUS REPORT FOR WS 399
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC005-009-017-031-049-069-075-091-101-103-111-113-117-135-171-
242340-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BLAINE BROWN
CHERRY DEUEL GARDEN
GRANT HOOKER KEITH
KEYA PAHA LINCOLN LOGAN
MCPHERSON PERKINS THOMAS
$$
SDC007-017-021-031-041-045-049-055-059-065-069-071-075-085-089-
095-107-117-119-121-123-129-242340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUFFALO CAMPBELL
CORSON DEWEY EDMUNDS
FAULK HAAKON HAND
HUGHES HYDE JACKSON
JONES LYMAN MCPHERSON
MELLETTE POTTER STANLEY
SULLY TODD TRIPP
WALWORTH
$$
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 (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
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 
@NWSSPC
