Source: US National Oceanic and Atmospheric Administration
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 519
NWS Storm Prediction Center Norman OK
240 PM MDT Wed Jul 16 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Colorado
Nebraska Panhandle
Southeast Wyoming
* Effective this Wednesday afternoon and evening from 240 PM
until 1000 PM MDT.
* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY…Scattered thunderstorms developing near Interstate 25 will
continue to intensify this afternoon and move eastward across the
Watch. Appreciably strong deep-layer shear will support a mix of
supercells and severe multicells across mainly the northern half of
the Watch. Large hail and severe gusts will be the primary hazards
with the stronger storms, but a tornado is possible. Severe
thunderstorms posing primarily a severe-wind risk are possible later
this evening as storms congeal into a likely cluster across
southeast Colorado.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 40 miles north of
Cheyenne WY to 25 miles west southwest of Springfield CO. 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.
&&
OTHER WATCH INFORMATION…CONTINUE…WW 517…WW 518…
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 500. Mean storm motion vector
27025.
…Smith
SEL9
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 519
NWS Storm Prediction Center Norman OK
240 PM MDT Wed Jul 16 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Colorado
Nebraska Panhandle
Southeast Wyoming
* Effective this Wednesday afternoon and evening from 240 PM
until 1000 PM MDT.
* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY…Scattered thunderstorms developing near Interstate 25 will
continue to intensify this afternoon and move eastward across the
Watch. Appreciably strong deep-layer shear will support a mix of
supercells and severe multicells across mainly the northern half of
the Watch. Large hail and severe gusts will be the primary hazards
with the stronger storms, but a tornado is possible. Severe
thunderstorms posing primarily a severe-wind risk are possible later
this evening as storms congeal into a likely cluster across
southeast Colorado.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 40 miles north of
Cheyenne WY to 25 miles west southwest of Springfield CO. 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.
&&
OTHER WATCH INFORMATION…CONTINUE…WW 517…WW 518…
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 500. Mean storm motion vector
27025.
…Smith
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW9
WW 519 SEVERE TSTM CO NE WY 162040Z – 170400Z
AXIS..65 STATUTE MILES EAST AND WEST OF LINE..
40N CYS/CHEYENNE WY/ – 25WSW SPD/SPRINGFIELD CO/
..AVIATION COORDS.. 55NM E/W /31N CYS – 28ESE TBE/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27025.
LAT…LON 41720356 37130186 37130422 41720608
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 519 Status Report Message has not been issued yet.
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 ( 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 (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.