MIL-OSI USA: SPC Severe Thunderstorm Watch 306

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.
SEL6

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 306
NWS Storm Prediction Center Norman OK
440 PM CDT Wed Jun 23 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Western to central Nebraska

* Effective this Wednesday afternoon and evening from 440 PM
until 1100 PM CDT.

* Primary threats include…
Scattered damaging winds and isolated significant gusts to 80
mph likely
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible

SUMMARY…A few high-based supercells should initially develop
across the Panhandle into north-central portions of Nebraska. Later
this evening, thunderstorms should increase in coverage and develop
into a forward-propagating cluster across western to central
Nebraska.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 10 miles northeast of
Oneill NE to 80 miles west southwest of Mullen NE. 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.

&&

AVIATION…A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
30030.

…Grams

SEL6

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 306
NWS Storm Prediction Center Norman OK
440 PM CDT Wed Jun 23 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Western to central Nebraska

* Effective this Wednesday afternoon and evening from 440 PM
until 1100 PM CDT.

* Primary threats include…
Scattered damaging winds and isolated significant gusts to 80
mph likely
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible

SUMMARY…A few high-based supercells should initially develop
across the Panhandle into north-central portions of Nebraska. Later
this evening, thunderstorms should increase in coverage and develop
into a forward-propagating cluster across western to central
Nebraska.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 10 miles northeast of
Oneill NE to 80 miles west southwest of Mullen NE. 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.

&&

AVIATION…A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
30030.

…Grams

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW6
WW 306 SEVERE TSTM NE 232140Z – 240400Z
AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
10NE ONL/ONEILL NE/ – 80WSW MHN/MULLEN NE/
..AVIATION COORDS.. 50NM N/S /9NE ONL – 37NE SNY/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 30030.

LAT…LON 41709854 40730250 42470250 43449854

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

Watch 306 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 (60%)

HailProbability of 10 or more severe hail events

Mod (40%)

Probability of 1 or more hailstones > 2 inches

Mod (30%)

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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