MIL-OSI USA: SPC Severe Thunderstorm Watch 394

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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.
SEL4

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 394
NWS Storm Prediction Center Norman OK
725 PM CDT Mon Jul 26 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Northwest Wisconsin
Lake Superior

* Effective this Monday night from 725 PM until Midnight CDT.

* Primary threats include…
Scattered damaging winds and isolated significant gusts to 80
mph possible
Scattered large hail and isolated very large hail events to 3
inches in diameter possible
A tornado or two possible

SUMMARY…Long-lived supercell cluster should continue
east-southeast from northeast Minnesota into northwest Wisconsin
through late evening.

The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 5 miles south of
Ironwood MI to 15 miles south southwest of Duluth MN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU4).

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 393…

AVIATION…A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
31030.

…Grams

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW4
WW 394 SEVERE TSTM WI LS 270025Z – 270500Z
AXIS..65 STATUTE MILES NORTH AND SOUTH OF LINE..
5S IWD/IRONWOOD MI/ – 15SSW DLH/DULUTH MN/
..AVIATION COORDS.. 55NM N/S /57NNW RHI – 11SSW DLH/
HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 31030.

LAT…LON 45529013 45699230 47579230 47409013

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.

Watch 394 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 (EF2-EF5) tornadoes

Low (5%)

WindProbability of 10 or more severe wind events

Mod (40%)

Probability of 1 or more wind events > 65 knots

Mod (40%)

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 (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.

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