Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 270
NWS Storm Prediction Center Norman OK
415 PM MDT Mon May 20 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Nebraska Panhandle
Southeast Wyoming
* Effective this Monday afternoon and evening from 415 PM until
1100 PM MDT.
* Primary threats include...
Scattered large hail events to 1.5 inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Scattered severe storms are expected to from and spread
east-northeastward across southeast Wyoming and the southwest
Nebraska Panhandle, with the primary threats of hail 1-1.5 inches in
diameter and severe gusts of 60-70 mph.
The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 15 miles west northwest
of Scottsbluff NE to 45 miles west of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 268...WW 269...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
25025.
...Thompson
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 270
NWS Storm Prediction Center Norman OK
415 PM MDT Mon May 20 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Nebraska Panhandle
Southeast Wyoming
* Effective this Monday afternoon and evening from 415 PM until
1100 PM MDT.
* Primary threats include...
Scattered large hail events to 1.5 inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Scattered severe storms are expected to from and spread
east-northeastward across southeast Wyoming and the southwest
Nebraska Panhandle, with the primary threats of hail 1-1.5 inches in
diameter and severe gusts of 60-70 mph.
The severe thunderstorm watch area is approximately along and 70
statute miles east and west of a line from 15 miles west northwest
of Scottsbluff NE to 45 miles west of Sidney NE. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 268...WW 269...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
25025.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 270 SEVERE TSTM NE WY 202215Z - 210500Z
AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
15WNW BFF/SCOTTSBLUFF NE/ - 45W SNY/SIDNEY NE/
..AVIATION COORDS.. 60NM E/W /18WNW BFF - 39W SNY/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25025.
LAT...LON 41950251 41090250 41090519 41950523
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 270 Status Report Messages:
STATUS REPORT #2 ON WW 270
VALID 210230Z - 210340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W SNY TO
5 ESE TOR.
..KERR..05/21/24
ATTN...WFO...CYS...
&&
STATUS REPORT FOR WS 270
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC007-033-105-123-157-210340-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER CHEYENNE KIMBALL
MORRILL SCOTTS BLUFF
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 270
VALID 210135Z - 210240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..05/21/24
ATTN...WFO...CYS...
&&
STATUS REPORT FOR WS 270
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NEC007-033-105-123-157-210240-
NE
. NEBRASKA COUNTIES INCLUDED ARE
BANNER CHEYENNE KIMBALL
MORRILL SCOTTS BLUFF
$$
WYC015-021-031-210240-
WY
. WYOMING COUNTIES INCLUDED ARE
GOSHEN LARAMIE PLATTE
$$
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 (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (20%)
|
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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