MIL-OSI USA: SPC Tornado Watch 517

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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.
SEL7

URGENT – IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 517
NWS Storm Prediction Center Norman OK
320 PM CDT Sun Oct 10 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of
Much of Central and Southwest Oklahoma
Western North Texas

* Effective this Sunday afternoon and evening from 320 PM until
1000 PM CDT.

* Primary threats include…
Several tornadoes and a couple intense tornadoes likely
Widespread damaging winds and isolated significant gusts to 85
mph likely
Scattered large hail and isolated very large hail events to 2.5
inches in diameter likely

SUMMARY…Severe thunderstorms are expected to rapidly develop this
afternoon over southwest Oklahoma and race northeastward across the
watch area. Supercells capable of strong tornadoes and significant
wind damage are possible – especially along the I-44 corridor.

The tornado watch area is approximately along and 70 statute miles
north and south of a line from 50 miles west southwest of Altus OK
to 40 miles northeast of Chandler OK. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS…

REMEMBER…A Tornado Watch means conditions are favorable for
tornadoes and 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.

&&

OTHER WATCH INFORMATION…CONTINUE…WW 516…

AVIATION…Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 75 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 25040.

…Hart

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW7
WW 517 TORNADO OK TX 102020Z – 110300Z
AXIS..70 STATUTE MILES NORTH AND SOUTH OF LINE..
50WSW LTS/ALTUS OK/ – 40NE CQB/CHANDLER OK/
..AVIATION COORDS.. 60NM N/S /10E CDS – 26W TUL/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..75 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 25040.

LAT…LON 35380008 37149631 35129631 33360008

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.

Watch 517 Status Report Message has not been issued yet.

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

High (90%)

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

High (70%)

WindProbability of 10 or more severe wind events

High (90%)

Probability of 1 or more wind events > 65 knots

High (70%)

HailProbability of 10 or more severe hail events

High (70%)

Probability of 1 or more hailstones > 2 inches

Mod (60%)

Combined Severe Hail/WindProbability of 6 or more combined severe hail/wind events

High (>95%)

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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