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.
SEL0
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 520
NWS Storm Prediction Center Norman OK
550 PM EDT Wed Jul 16 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern Indiana
Southwest Lower Michigan
Lake Michigan
* Effective this Wednesday afternoon from 550 PM until Midnight
EDT.
* Primary threats include…
Scattered damaging wind gusts to 65 mph possible
SUMMARY…Thunderstorms currently affecting northeast Illinois will
track eastward across the watch area through the early evening.
Locally damaging wind gusts are the primary concern.
The severe thunderstorm watch area is approximately along and 40
statute miles east and west of a line from 60 miles south of South
Bend IN to 35 miles north northwest of Kalamazoo MI. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 517…WW 518…WW 519…
AVIATION…A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
25025.
…Hart
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW0
WW 520 SEVERE TSTM IN MI LM 162150Z – 170400Z
AXIS..40 STATUTE MILES EAST AND WEST OF LINE..
60S SBN/SOUTH BEND IN/ – 35NNW AZO/KALAMAZOO MI/
..AVIATION COORDS.. 35NM E/W /38ENE BVT – 15WSW GRR/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..55 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 25025.
LAT…LON 40838709 42698660 42698503 40838555
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 520 Status Report Message has not been issued yet.
Note: Click for Complete Product Text.Tornadoes
Probability of 2 or more tornadoes
Low (