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 411
NWS Storm Prediction Center Norman OK
155 PM MDT Sun Aug 2 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Front Range of Colorado
Extreme southeast Wyoming
* Effective this Sunday afternoon and evening from 155 PM until
900 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
SUMMARY...Scattered severe thunderstorms will develop and move
southeast across the watch area this afternoon and evening. Large
hail and damaging wind gusts can be expected.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 25 miles northeast of
Laramie WY to 15 miles south southeast of Trinidad CO. 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 410...
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
34025.
...Bunting
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 411 SEVERE TSTM CO WY 021955Z - 030300Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
25NE LAR/LARAMIE WY/ - 15SSE TAD/TRINIDAD CO/
..AVIATION COORDS.. 50NM E/W /23NE LAR - 32WSW TBE/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 34025.
LAT...LON 41570417 37060314 37060531 41570649
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 411 Status Report Messages:
STATUS REPORT #2 ON WW 411
VALID 022335Z - 030040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 ESE EGE
TO 15 NW FCL TO 25 NE LAR.
..BROYLES..08/02/20
ATTN...WFO...BOU...PUB...CYS...
&&
STATUS REPORT FOR WS 411
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC001-005-013-014-019-025-027-031-035-039-041-043-047-055-059-
071-073-087-089-093-101-119-123-030040-
CO
. COLORADO COUNTIES INCLUDED ARE
ADAMS ARAPAHOE BOULDER
BROOMFIELD CLEAR CREEK CROWLEY
CUSTER DENVER DOUGLAS
ELBERT EL PASO FREMONT
GILPIN HUERFANO JEFFERSON
LAS ANIMAS LINCOLN MORGAN
OTERO PARK PUEBLO
TELLER WELD
$$
WYC021-031-030040-
WY
. WYOMING COUNTIES INCLUDED ARE
LARAMIE PLATTE
$$
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.
$$
STATUS REPORT #1 ON WW 411
VALID 022235Z - 022340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..08/02/20
ATTN...WFO...BOU...PUB...CYS...
&&
STATUS REPORT FOR WS 411
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
COC001-005-013-014-019-025-027-031-035-039-041-043-047-055-059-
069-071-073-087-089-093-101-119-123-022340-
CO
. COLORADO COUNTIES INCLUDED ARE
ADAMS ARAPAHOE BOULDER
BROOMFIELD CLEAR CREEK CROWLEY
CUSTER DENVER DOUGLAS
ELBERT EL PASO FREMONT
GILPIN HUERFANO JEFFERSON
LARIMER LAS ANIMAS LINCOLN
MORGAN OTERO PARK
PUEBLO TELLER WELD
$$
WYC001-021-031-022340-
WY
. WYOMING COUNTIES INCLUDED ARE
ALBANY 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 (<5%)
|
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 (10%)
|
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.