MIL-OSI USA: SPC Severe Thunderstorm Watch 261

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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.
SEL1

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 261
NWS Storm Prediction Center Norman OK
645 PM CDT Fri Jun 11 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
southeast Kansas
north central and northeast Oklahoma

* Effective this Friday night and Saturday morning from 645 PM
until 200 AM CDT.

* Primary threats include…
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible

SUMMARY…Storms developing along a cold front and
southward-advancing outflow boundaries will pose a risk for damaging
wind and hail as they develop through southeast Kansas and north
central through northeast Oklahoma this evening.

The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 40 miles north
northwest of Enid OK to 45 miles east southeast of Chanute KS. 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 259…WW 260…

AVIATION…A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
32035.

…Dial

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW1
WW 261 SEVERE TSTM KS OK 112345Z – 120700Z
AXIS..75 STATUTE MILES NORTH AND SOUTH OF LINE..
40NNW END/ENID OK/ – 45ESE CNU/CHANUTE KS/
..AVIATION COORDS.. 65NM N/S /35NNW END – 28NE OSW/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 32035.

LAT…LON 37979820 38509472 36339472 35809820

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.

Watch 261 Status Report Message has not been issued yet.

Note:  Click for Complete Product Text.TornadoesProbability of 2 or more tornadoes

Low (10%)

Probability of 1 or more strong (EF2-EF5) tornadoes

Low ( 65 knots

Mod (50%)

HailProbability of 10 or more severe hail events

Mod (40%)

Probability of 1 or more hailstones > 2 inches

Mod (40%)

Combined Severe Hail/WindProbability 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.

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