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 660
NWS Storm Prediction Center Norman OK
815 PM EDT Tue Aug 27 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern Indiana
Far Southwest Lower Michigan
Lake Michigan
* Effective this Tuesday night and Wednesday morning from 815 PM
until 200 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...Thunderstorms will spread southeastward across far
southwest Lower Michigan and northern Indiana this evening while
posing a threat for mainly severe/damaging winds up to 60-70 mph.
Isolated large hail may also occur.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 55 miles east southeast
of South Bend IN to 40 miles southwest of South Bend IN. 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 658...WW 659...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30035.
...Gleason
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 660 SEVERE TSTM IN MI LM 280015Z - 280600Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
55ESE SBN/SOUTH BEND IN/ - 40SW SBN/SOUTH BEND IN/
..AVIATION COORDS.. 40NM N/S /26NNW FWA - 38SW GIJ/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 30035.
LAT...LON 40748534 40648686 41948686 42048534
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 660 Status Report Messages:
STATUS REPORT #3 ON WW 660
VALID 280325Z - 280440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM VPZ TO 20 SE
SBN TO 15 E AZO.
..DEAN..08/28/24
ATTN...WFO...IWX...
&&
STATUS REPORT FOR WS 660
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC017-039-049-069-085-087-099-103-113-131-149-169-181-183-
280440-
IN
. INDIANA COUNTIES INCLUDED ARE
CASS ELKHART FULTON
HUNTINGTON KOSCIUSKO LAGRANGE
MARSHALL MIAMI NOBLE
PULASKI STARKE WABASH
WHITE WHITLEY
$$
MIC149-280440-
MI
. MICHIGAN COUNTIES INCLUDED ARE
ST. JOSEPH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 660
VALID 280250Z - 280340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..DEAN..08/28/24
ATTN...WFO...IWX...
&&
STATUS REPORT FOR WS 660
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC017-039-049-069-085-087-091-099-103-113-131-141-149-169-181-
183-280340-
IN
. INDIANA COUNTIES INCLUDED ARE
CASS ELKHART FULTON
HUNTINGTON KOSCIUSKO LAGRANGE
LA PORTE MARSHALL MIAMI
NOBLE PULASKI ST. JOSEPH
STARKE WABASH WHITE
WHITLEY
$$
MIC021-027-149-280340-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BERRIEN CASS ST. JOSEPH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 660
VALID 280030Z - 280140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..DEAN..08/28/24
ATTN...WFO...IWX...
&&
STATUS REPORT FOR WS 660
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC017-039-049-069-085-087-091-099-103-113-131-141-149-169-181-
183-280140-
IN
. INDIANA COUNTIES INCLUDED ARE
CASS ELKHART FULTON
HUNTINGTON KOSCIUSKO LAGRANGE
LA PORTE MARSHALL MIAMI
NOBLE PULASKI ST. JOSEPH
STARKE WABASH WHITE
WHITLEY
$$
MIC021-027-149-280140-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BERRIEN CASS ST. JOSEPH
$$
LMZ043-046-080-280140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NEW BUFFALO MI TO ST JOSEPH MI
MICHIGAN CITY IN TO NEW BUFFALO MI
LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
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.
weather.gov 
@NWSSPC
