MIL-OSI USA: SPC Severe Thunderstorm Watch 176

By   /  June 14, 2018  /  Comments Off on MIL-OSI USA: SPC Severe Thunderstorm Watch 176

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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.
SEL6

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 176
NWS Storm Prediction Center Norman OK
630 PM EDT Wed Jun 13 2018

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Extreme Eastern Ohio
Western and Central Pennsylvania
Northern West Virginia Panhandle

* Effective this Wednesday evening from 630 PM until 1100 PM EDT.

* Primary threats include…
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1.5 inches in diameter possible
A tornado or two possible

SUMMARY…Storms developing along an advancing cold front are
expected to progress eastward this evening posing a threat for
primarily damaging wind gusts and isolated hail.

The severe thunderstorm watch area is approximately along and 90
statute miles east and west of a line from 45 miles north of State
College PA to 40 miles south southeast of Latrobe PA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).

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 175…

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 500. Mean storm motion vector
27030.

…Weiss

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW6
WW 176 SEVERE TSTM OH PA WV 132230Z – 140300Z
AXIS..90 STATUTE MILES EAST AND WEST OF LINE..
45N UNV/STATE COLLEGE PA/ – 40SSE LBE/LATROBE PA/
..AVIATION COORDS.. 80NM E/W /5E SLT – 37SSW JST/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27030.

LAT…LON 41497611 39727741 39728080 41497958

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.

Watch 176 Status Report Message has not been issued yet.

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

Low (20%)

Probability of 1 or more strong (F2-F5) tornadoes

Low (5%)

WindProbability of 10 or more severe wind events

Mod (50%)

Probability of 1 or more wind events > 65 knots

Low (10%)

HailProbability of 10 or more severe hail events

Mod (30%)

Probability of 1 or more hailstones > 2 inches

Low (10%)

Combined Severe Hail/WindProbability 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% (F2-F5 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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