Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 478
NWS Storm Prediction Center Norman OK
855 PM EDT Wed Jul 12 2023
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northern Indiana
Southern Lower Michigan
Northwest Ohio
Lake Erie
Lake Michigan
* Effective this Wednesday night and Thursday morning from 855 PM
until 300 AM EDT.
* Primary threats include...
A couple tornadoes possible
Isolated damaging wind gusts to 65 mph possible
SUMMARY...Strong/severe thunderstorms including a few supercells are
expected to develop generally eastward across the region tonight,
with some tornado potential aside from locally damaging winds.
The tornado watch area is approximately along and 50 statute miles
north and south of a line from 25 miles west southwest of Benton
Harbor MI to 20 miles east northeast of Detroit MI. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 477...
AVIATION...Tornadoes and 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 27025.
...Guyer
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 478
NWS Storm Prediction Center Norman OK
855 PM EDT Wed Jul 12 2023
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northern Indiana
Southern Lower Michigan
Northwest Ohio
Lake Erie
Lake Michigan
* Effective this Wednesday night and Thursday morning from 855 PM
until 300 AM EDT.
* Primary threats include...
A couple tornadoes possible
Isolated damaging wind gusts to 65 mph possible
SUMMARY...Strong/severe thunderstorms including a few supercells are
expected to develop generally eastward across the region tonight,
with some tornado potential aside from locally damaging winds.
The tornado watch area is approximately along and 50 statute miles
north and south of a line from 25 miles west southwest of Benton
Harbor MI to 20 miles east northeast of Detroit MI. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 477...
AVIATION...Tornadoes and 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 27025.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW8
WW 478 TORNADO IN MI OH LE LM 130055Z - 130700Z
AXIS..50 STATUTE MILES NORTH AND SOUTH OF LINE..
25WSW BEH/BENTON HARBOR MI/ - 20ENE DTW/DETROIT MI/
..AVIATION COORDS.. 45NM N/S /28WNW GIJ - 18ENE DXO/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..55 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27025.
LAT...LON 42718688 43058299 41618299 41278688
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 478 Status Report Messages:
STATUS REPORT #3 ON WW 478
VALID 130500Z - 130640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 N FWA TO
20 ENE JXN TO 15 S MBS.
..DEAN..07/13/23
ATTN...WFO...IWX...GRR...DTX...
&&
STATUS REPORT FOR WT 478
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MIC091-093-099-115-125-161-163-130640-
MI
. MICHIGAN COUNTIES INCLUDED ARE
LENAWEE LIVINGSTON MACOMB
MONROE OAKLAND WASHTENAW
WAYNE
$$
LCZ423-460-LEZ444-130640-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DETROIT RIVER
LAKE ST. CLAIR OPEN LAKE (U.S. PORTION)
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI
$$
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.
$$
STATUS REPORT #2 ON WW 478
VALID 130330Z - 130440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NW FWA TO
25 SSE AZO TO 20 NW LAN.
..THORNTON..07/13/23
ATTN...WFO...IWX...GRR...DTX...
&&
STATUS REPORT FOR WT 478
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC033-087-113-151-130440-
IN
. INDIANA COUNTIES INCLUDED ARE
DE KALB LAGRANGE NOBLE
STEUBEN
$$
MIC023-025-045-059-065-075-091-093-099-115-125-161-163-130440-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BRANCH CALHOUN EATON
HILLSDALE INGHAM JACKSON
LENAWEE LIVINGSTON MACOMB
MONROE OAKLAND WASHTENAW
WAYNE
$$
OHC051-171-130440-
OH
. OHIO COUNTIES INCLUDED ARE
FULTON WILLIAMS
$$
LCZ423-460-LEZ444-130440-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DETROIT RIVER
LAKE ST. CLAIR OPEN LAKE (U.S. PORTION)
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 478
VALID 130250Z - 130340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 S VPZ TO
10 SE SBN TO 25 NE SBN TO 5 E GRR.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1512
..THORNTON..07/13/23
ATTN...WFO...IWX...GRR...DTX...
&&
STATUS REPORT FOR WT 478
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC033-039-085-087-099-113-149-151-130340-
IN
. INDIANA COUNTIES INCLUDED ARE
DE KALB ELKHART KOSCIUSKO
LAGRANGE MARSHALL NOBLE
STARKE STEUBEN
$$
MIC015-023-025-045-059-065-075-077-091-093-099-115-125-149-161-
163-130340-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BARRY BRANCH CALHOUN
EATON HILLSDALE INGHAM
JACKSON KALAMAZOO LENAWEE
LIVINGSTON MACOMB MONROE
OAKLAND ST. JOSEPH WASHTENAW
WAYNE
$$
OHC051-171-130340-
OH
. OHIO COUNTIES INCLUDED ARE
FULTON WILLIAMS
$$
LCZ423-460-LEZ444-130340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DETROIT RIVER
LAKE ST. CLAIR OPEN LAKE (U.S. PORTION)
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI
$$
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
|
Mod (30%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Low (10%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
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 
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