Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 431
NWS Storm Prediction Center Norman OK
805 PM EDT Mon Aug 10 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme southeastern Indiana
Extreme north central Kentucky
Western Ohio
Lake Erie
* Effective this Monday night and Tuesday morning from 805 PM
until 100 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...A well-developed squall line will likely persist for a few
more hours while moving from Indiana into western Ohio and northern
Kentucky. The threat for occasional damaging gusts will likewise
continue, until the storms weaken later tonight.
The severe thunderstorm watch area is approximately along and 40
statute miles east and west of a line from 15 miles north northwest
of Toledo OH to 50 miles south southwest of Cincinnati OH. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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 427...WW 428...WW
429...WW 430...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Thompson
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 431
NWS Storm Prediction Center Norman OK
805 PM EDT Mon Aug 10 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme southeastern Indiana
Extreme north central Kentucky
Western Ohio
Lake Erie
* Effective this Monday night and Tuesday morning from 805 PM
until 100 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...A well-developed squall line will likely persist for a few
more hours while moving from Indiana into western Ohio and northern
Kentucky. The threat for occasional damaging gusts will likewise
continue, until the storms weaken later tonight.
The severe thunderstorm watch area is approximately along and 40
statute miles east and west of a line from 15 miles north northwest
of Toledo OH to 50 miles south southwest of Cincinnati OH. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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 427...WW 428...WW
429...WW 430...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 431 SEVERE TSTM IN KY OH LE 110005Z - 110500Z
AXIS..40 STATUTE MILES EAST AND WEST OF LINE..
15NNW TOL/TOLEDO OH/ - 50SSW LUK/CINCINNATI OH/
..AVIATION COORDS.. 35NM E/W /35SW DXO - 36S CVG/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 28035.
LAT...LON 41788314 38438403 38438551 41788469
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 431 Status Report Messages:
STATUS REPORT #3 ON WW 431
VALID 110325Z - 110440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NW LEX TO
35 ENE LUK.
..GOSS..08/11/20
ATTN...WFO...ILN...CLE...
&&
STATUS REPORT FOR WS 431
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
KYC037-191-110440-
KY
. KENTUCKY COUNTIES INCLUDED ARE
CAMPBELL PENDLETON
$$
OHC025-110440-
OH
. OHIO COUNTIES INCLUDED ARE
CLERMONT
$$
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.
$$
STATUS REPORT #2 ON WW 431
VALID 110235Z - 110340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNE SDF
TO 35 W CMH.
..GOSS..08/11/20
ATTN...WFO...ILN...CLE...
&&
STATUS REPORT FOR WS 431
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC115-155-110340-
IN
. INDIANA COUNTIES INCLUDED ARE
OHIO SWITZERLAND
$$
KYC015-037-041-077-081-117-187-191-110340-
KY
. KENTUCKY COUNTIES INCLUDED ARE
BOONE CAMPBELL CARROLL
GALLATIN GRANT KENTON
OWEN PENDLETON
$$
OHC025-027-057-061-165-110340-
OH
. OHIO COUNTIES INCLUDED ARE
CLERMONT CLINTON GREENE
HAMILTON WARREN
$$
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.
$$
STATUS REPORT #1 ON WW 431
VALID 110040Z - 110140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1464
..COOK..08/11/20
ATTN...WFO...ILN...CLE...
&&
STATUS REPORT FOR WS 431
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC029-041-047-115-137-155-161-177-110140-
IN
. INDIANA COUNTIES INCLUDED ARE
DEARBORN FAYETTE FRANKLIN
OHIO RIPLEY SWITZERLAND
UNION WAYNE
$$
KYC015-037-041-077-081-117-187-191-110140-
KY
. KENTUCKY COUNTIES INCLUDED ARE
BOONE CAMPBELL CARROLL
GALLATIN GRANT KENTON
OWEN PENDLETON
$$
OHC011-017-021-023-025-027-037-057-061-063-065-091-095-107-109-
113-123-135-143-147-149-165-173-175-110140-
OH
. OHIO COUNTIES INCLUDED ARE
AUGLAIZE BUTLER CHAMPAIGN
CLARK CLERMONT CLINTON
DARKE GREENE HAMILTON
HANCOCK HARDIN LOGAN
LUCAS MERCER MIAMI
MONTGOMERY OTTAWA PREBLE
SANDUSKY SENECA SHELBY
WARREN WOOD WYANDOT
$$
LEZ142-143-163-110140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
MAUMEE BAY TO RENO BEACH OH
RENO BEACH TO THE ISLANDS OH
RENO BEACH TO THE ISLANDS OH BEYOND 5NM OFF SHORELINE TO
US-CANADIAN BORDER
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
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 (<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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