MIL-OSI USA: SPC Severe Thunderstorm Watch 75

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.
SEL5

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 75
NWS Storm Prediction Center Norman OK
510 PM EDT Sun Mar 30 2025

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Southeast Lower Michigan
Northwest Ohio
Lake Erie
Lake Huron

* Effective this Sunday afternoon and evening from 510 PM until
1000 PM EDT.

* Primary threats include…
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible

SUMMARY…A well-developed squall line will move quickly
northeastward from Indiana into Lower Michigan and northwest Ohio
through this evening, with a continued threat for damaging winds of
60-75 mph, isolated large hail near 1 inch diameter, and possibly a
tornado or two with embedded circulations.

The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 25 miles northeast of
Saginaw MI to 50 miles southwest of Findlay OH. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU5).

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 70…WW 71…WW 72…WW
73…WW 74…

AVIATION…A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
23050.

…Thompson

SEL5

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 75
NWS Storm Prediction Center Norman OK
510 PM EDT Sun Mar 30 2025

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Southeast Lower Michigan
Northwest Ohio
Lake Erie
Lake Huron

* Effective this Sunday afternoon and evening from 510 PM until
1000 PM EDT.

* Primary threats include…
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible

SUMMARY…A well-developed squall line will move quickly
northeastward from Indiana into Lower Michigan and northwest Ohio
through this evening, with a continued threat for damaging winds of
60-75 mph, isolated large hail near 1 inch diameter, and possibly a
tornado or two with embedded circulations.

The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 25 miles northeast of
Saginaw MI to 50 miles southwest of Findlay OH. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU5).

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 70…WW 71…WW 72…WW
73…WW 74…

AVIATION…A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
23050.

…Thompson

Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW5
WW 75 SEVERE TSTM MI OH LE LH 302110Z – 310200Z
AXIS..55 STATUTE MILES EAST AND WEST OF LINE..
25NE MBS/SAGINAW MI/ – 50SW FDY/FINDLAY OH/
..AVIATION COORDS.. 50NM E/W /22NE MBS – 19NW ROD/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 23050.

LAT…LON 43788262 40508330 40508539 43788483

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU5.

Watch 75 Status Report Message has not been issued yet.

Note:  Click for Complete Product Text.Tornadoes

Probability of 2 or more tornadoes

Low (20%)

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

Low (5%)

Wind

Probability of 10 or more severe wind events

High (70%)

Probability of 1 or more wind events > 65 knots

Mod (40%)

Hail

Probability of 10 or more severe hail events

Mod (30%)

Probability of 1 or more hailstones > 2 inches

Low (10%)

Combined Severe Hail/Wind

Probability 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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