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 73
NWS Storm Prediction Center Norman OK
415 PM EDT Sun Mar 30 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Lower Michigan
Lake Michigan
* Effective this Sunday afternoon and evening from 415 PM until
900 PM EDT.
* Primary threats include…
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY…A well-developed squall line with bowing segments will
move quickly northeastward from Indiana into southwest Lower
Michigan through the afternoon/evening. Swaths of damaging winds
(60-75 mph) are likely with this squall line, along with the
potential for isolated large hail and a tornado or two with embedded
circulations.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 40 miles north of Grand
Rapids MI to 10 miles southwest of Kalamazoo MI. 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 70…WW 71…WW 72…
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
SEL3
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 73
NWS Storm Prediction Center Norman OK
415 PM EDT Sun Mar 30 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Lower Michigan
Lake Michigan
* Effective this Sunday afternoon and evening from 415 PM until
900 PM EDT.
* Primary threats include…
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY…A well-developed squall line with bowing segments will
move quickly northeastward from Indiana into southwest Lower
Michigan through the afternoon/evening. Swaths of damaging winds
(60-75 mph) are likely with this squall line, along with the
potential for isolated large hail and a tornado or two with embedded
circulations.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 40 miles north of Grand
Rapids MI to 10 miles southwest of Kalamazoo MI. 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 70…WW 71…WW 72…
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.
SAW3
WW 73 SEVERE TSTM MI LM 302015Z – 310100Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
40N GRR/GRAND RAPIDS MI/ – 10SW AZO/KALAMAZOO MI/
..AVIATION COORDS.. 50NM E/W /29NE MKG – 28SE PMM/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 23050.
LAT…LON 43458432 42128452 42128686 43458672
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.
Watch 73 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 (40%)
Probability of 1 or more hailstones > 2 inches
Low (20%)
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.