MIL-OSI USA: SPC Severe Thunderstorm Watch 393

2

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.
SEL3

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 393
NWS Storm Prediction Center Norman OK
520 PM CDT Mon Jul 26 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Northern to central Minnesota
Southeast North Dakota
Northeast South Dakota

* Effective this Monday afternoon from 520 PM until Midnight CDT.

* Primary threats include…
Scattered large hail and isolated very large hail events to 4
inches in diameter likely
Scattered damaging winds and isolated significant gusts to 80
mph possible
A tornado or two possible

SUMMARY…Intense supercell over northwest Minnesota may become a
long-track, cyclic giant hail producing storm across north-central
Minnesota. Additional storms are expected along a front in
south-central to southeast North Dakota, with further development
farther east towards central Minnesota through the evening.

The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 60 miles north of
Mobridge SD to 30 miles north northeast of Duluth MN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).

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 392…

AVIATION…A few severe thunderstorms with hail surface and aloft to
4 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
32025.

…Grams

SEL3

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 393
NWS Storm Prediction Center Norman OK
520 PM CDT Mon Jul 26 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Northern to central Minnesota
Southeast North Dakota
Northeast South Dakota

* Effective this Monday afternoon from 520 PM until Midnight CDT.

* Primary threats include…
Scattered large hail and isolated very large hail events to 4
inches in diameter likely
Scattered damaging winds and isolated significant gusts to 80
mph possible
A tornado or two possible

SUMMARY…Intense supercell over northwest Minnesota may become a
long-track, cyclic giant hail producing storm across north-central
Minnesota. Additional storms are expected along a front in
south-central to southeast North Dakota, with further development
farther east towards central Minnesota through the evening.

The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 60 miles north of
Mobridge SD to 30 miles north northeast of Duluth MN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).

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 392…

AVIATION…A few severe thunderstorms with hail surface and aloft to
4 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
32025.

…Grams

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW3
WW 393 SEVERE TSTM MN ND SD 262220Z – 270500Z
AXIS..65 STATUTE MILES NORTH AND SOUTH OF LINE..
60N MBG/MOBRIDGE SD/ – 30NNE DLH/DULUTH MN/
..AVIATION COORDS.. 55NM N/S /24SSE BIS – 28NNE DLH/
HAIL SURFACE AND ALOFT..4 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 32025.

LAT…LON 47340043 48179194 46299194 45460043

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.

Watch 393 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 (50%)

Probability of 1 or more wind events > 65 knots

Mod (40%)

HailProbability of 10 or more severe hail events

High (70%)

Probability of 1 or more hailstones > 2 inches

High (70%)

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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