Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 208
NWS Storm Prediction Center Norman OK
215 PM CDT Sat May 23 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northeast Colorado
Western Nebraska
Western South Dakota
Eastern Wyoming
* Effective this Saturday afternoon and evening from 215 PM until
900 PM CDT.
* Primary threats include...
Scattered large hail likely with isolated very large hail events
to 2.5 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Clusters of intense thunderstorms are expected to form
this afternoon and spread eastward across the watch area. Large
hail will be the primary threat, although locally damaging wind
potential will increase through the late afternoon.
The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 15 miles northeast of
Buffalo SD to 40 miles south southeast of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
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 207...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24030.
...Hart
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 208
NWS Storm Prediction Center Norman OK
215 PM CDT Sat May 23 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northeast Colorado
Western Nebraska
Western South Dakota
Eastern Wyoming
* Effective this Saturday afternoon and evening from 215 PM until
900 PM CDT.
* Primary threats include...
Scattered large hail likely with isolated very large hail events
to 2.5 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Clusters of intense thunderstorms are expected to form
this afternoon and spread eastward across the watch area. Large
hail will be the primary threat, although locally damaging wind
potential will increase through the late afternoon.
The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 15 miles northeast of
Buffalo SD to 40 miles south southeast of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
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 207...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24030.
...Hart
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW8
WW 208 SEVERE TSTM CO NE SD WY 231915Z - 240200Z
AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
15NE 2WX/BUFFALO SD/ - 40SSE SNY/SIDNEY NE/
..AVIATION COORDS.. 60NM E/W /72SSW DIK - 33NE AKO/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24030.
LAT...LON 45710185 40560135 40560402 45710475
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 208 Status Report Messages:
STATUS REPORT #6 ON WW 208
VALID 240120Z - 240200Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNW AKO
TO 20 NW SNY TO 10 WSW AIA TO 20 SE CDR TO 35 W PHP TO 60 S Y22
TO 30 ESE Y22.
WW 208 WILL BE ALLOWED TO EXPIRE AT 240200Z.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 694
..LYONS..05/24/20
ATTN...WFO...BOU...LBF...CYS...UNR...
&&
STATUS REPORT FOR WS 208
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-095-115-240200-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN PHILLIPS SEDGWICK
$$
NEC005-029-031-033-049-069-075-101-123-135-161-240200-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR CHASE CHERRY
CHEYENNE DEUEL GARDEN
GRANT KEITH MORRILL
PERKINS SHERIDAN
$$
SDC007-055-071-102-137-240200-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT HAAKON JACKSON
OGLALA LAKOTA ZIEBACH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #5 ON WW 208
VALID 240035Z - 240140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 WNW AKO
TO 35 NW CDR TO 65 NNE RAP TO 25 ESE Y22.
..KARSTENS..05/24/20
ATTN...WFO...BOU...LBF...CYS...UNR...
&&
STATUS REPORT FOR WS 208
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-095-115-240140-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN PHILLIPS SEDGWICK
$$
NEC005-007-013-029-031-033-045-049-069-075-101-105-123-135-157-
161-165-240140-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BANNER BOX BUTTE
CHASE CHERRY CHEYENNE
DAWES DEUEL GARDEN
GRANT KEITH KIMBALL
MORRILL PERKINS SCOTTS BLUFF
SHERIDAN SIOUX
$$
SDC007-033-047-055-071-093-102-103-137-240140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT CUSTER FALL RIVER
HAAKON JACKSON MEADE
OGLALA LAKOTA PENNINGTON ZIEBACH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 208
VALID 232345Z - 240040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE CYS
TO 30 W CDR TO 20 WSW RAP TO 45 SSE 2WX TO 35 NE 2WX TO 40 NW Y22.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 693
..KARSTENS..05/23/20
ATTN...WFO...BOU...LBF...CYS...UNR...
&&
STATUS REPORT FOR WS 208
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-095-115-240040-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN PHILLIPS SEDGWICK
$$
NEC005-007-013-029-031-033-045-049-069-075-101-105-123-135-157-
161-165-240040-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BANNER BOX BUTTE
CHASE CHERRY CHEYENNE
DAWES DEUEL GARDEN
GRANT KEITH KIMBALL
MORRILL PERKINS SCOTTS BLUFF
SHERIDAN SIOUX
$$
SDC007-033-047-055-071-093-102-103-105-137-240040-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT CUSTER FALL RIVER
HAAKON JACKSON MEADE
OGLALA LAKOTA PENNINGTON PERKINS
ZIEBACH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 208
VALID 232240Z - 232340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KARSTENS..05/23/20
ATTN...WFO...BOU...LBF...CYS...UNR...
&&
STATUS REPORT FOR WS 208
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-095-115-232340-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN PHILLIPS SEDGWICK
$$
NEC005-007-013-029-031-033-045-049-069-075-101-105-123-135-157-
161-165-232340-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BANNER BOX BUTTE
CHASE CHERRY CHEYENNE
DAWES DEUEL GARDEN
GRANT KEITH KIMBALL
MORRILL PERKINS SCOTTS BLUFF
SHERIDAN SIOUX
$$
SDC007-019-033-047-055-063-071-081-093-102-103-105-137-232340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON HARDING
JACKSON LAWRENCE MEADE
OGLALA LAKOTA PENNINGTON PERKINS
ZIEBACH
$$
WYC011-015-027-045-232340-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK GOSHEN NIOBRARA
WESTON
$$
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.
$$
STATUS REPORT #2 ON WW 208
VALID 232140Z - 232240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KARSTENS..05/23/20
ATTN...WFO...BOU...LBF...CYS...UNR...
&&
STATUS REPORT FOR WS 208
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-095-115-232240-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN PHILLIPS SEDGWICK
$$
NEC005-007-013-029-031-033-045-049-069-075-101-105-123-135-157-
161-165-232240-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BANNER BOX BUTTE
CHASE CHERRY CHEYENNE
DAWES DEUEL GARDEN
GRANT KEITH KIMBALL
MORRILL PERKINS SCOTTS BLUFF
SHERIDAN SIOUX
$$
SDC007-019-033-047-055-063-071-081-093-102-103-105-137-232240-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON HARDING
JACKSON LAWRENCE MEADE
OGLALA LAKOTA PENNINGTON PERKINS
ZIEBACH
$$
WYC011-015-027-045-232240-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK GOSHEN NIOBRARA
WESTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 208
VALID 232040Z - 232140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 682
..KARSTENS..05/23/20
ATTN...WFO...BOU...LBF...CYS...UNR...
&&
STATUS REPORT FOR WS 208
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC075-095-115-232140-
CO
. COLORADO COUNTIES INCLUDED ARE
LOGAN PHILLIPS SEDGWICK
$$
NEC005-007-013-029-031-033-045-049-069-075-101-105-123-135-157-
161-165-232140-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ARTHUR BANNER BOX BUTTE
CHASE CHERRY CHEYENNE
DAWES DEUEL GARDEN
GRANT KEITH KIMBALL
MORRILL PERKINS SCOTTS BLUFF
SHERIDAN SIOUX
$$
SDC007-019-033-047-055-063-071-081-093-102-103-105-137-232140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON HARDING
JACKSON LAWRENCE MEADE
OGLALA LAKOTA PENNINGTON PERKINS
ZIEBACH
$$
WYC011-015-027-045-232140-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK GOSHEN NIOBRARA
WESTON
$$
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 (<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
|
High (70%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (40%)
|
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.