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The expiration time in the watch graphic is amended if the watch is
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Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 84
NWS Storm Prediction Center Norman OK
905 PM EDT Tue Apr 7 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern Indiana
Far southern Lower Michigan
Northern Ohio
Northwest Pennsylvania
Lake Erie
Lake Michigan
* Effective this Tuesday night and Wednesday morning from 905 PM
until 300 AM EDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail likely with isolated very large hail events
to 2.5 inches in diameter possible
A tornado or two possible
SUMMARY...Multiple clusters of supercells will evolve east-southeast
tonight with development into a broader MCS expected. A mix of large
hail and damaging wind gusts appear probable.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 20 miles south of
Valparaiso IN to 35 miles north northeast of Youngstown OH. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
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 81...WW 82...WW 83...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
29040.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 84 SEVERE TSTM IN MI OH PA LE LM 080105Z - 080700Z
AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
20S VPZ/VALPARAISO IN/ - 35NNE YNG/YOUNGSTOWN OH/
..AVIATION COORDS.. 50NM N/S /36N BVT - 19SSW ERI/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 29040.
LAT...LON 42038700 42598042 40848042 40298700
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 84 Status Report Messages:
STATUS REPORT #4 ON WW 84
VALID 080540Z - 080640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SSW VPZ
TO 35 S SBN TO 40 WSW FDY TO 15 WNW MFD TO 25 SSW CAK.
..GLEASON..04/08/20
ATTN...WFO...IWX...CLE...ILN...
&&
STATUS REPORT FOR WS 84
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC001-009-053-075-080640-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS BLACKFORD GRANT
JAY
$$
OHC003-011-033-065-075-083-101-107-117-139-161-175-080640-
OH
. OHIO COUNTIES INCLUDED ARE
ALLEN AUGLAIZE CRAWFORD
HARDIN HOLMES KNOX
MARION MERCER MORROW
RICHLAND VAN WERT WYANDOT
$$
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.
$$
STATUS REPORT #3 ON WW 84
VALID 080425Z - 080540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 S VPZ TO
30 ESE TOL TO 20 NW CAK TO 25 NNE YNG TO 25 WNW FKL.
..KERR..04/08/20
ATTN...WFO...IWX...CLE...ILN...
&&
STATUS REPORT FOR WS 84
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC001-003-009-017-033-049-053-069-075-085-099-103-113-131-149-
169-179-181-183-080540-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BLACKFORD
CASS DE KALB FULTON
GRANT HUNTINGTON JAY
KOSCIUSKO MARSHALL MIAMI
NOBLE PULASKI STARKE
WABASH WELLS WHITE
WHITLEY
$$
OHC003-005-011-033-039-063-065-069-075-077-083-099-101-103-107-
117-125-133-137-139-143-147-151-153-155-161-169-175-080540-
OH
. OHIO COUNTIES INCLUDED ARE
ALLEN ASHLAND AUGLAIZE
CRAWFORD DEFIANCE HANCOCK
HARDIN HENRY HOLMES
HURON KNOX MAHONING
MARION MEDINA MERCER
MORROW PAULDING PORTAGE
PUTNAM RICHLAND SANDUSKY
SENECA STARK SUMMIT
TRUMBULL VAN WERT WAYNE
WYANDOT
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 84
VALID 080335Z - 080440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 N VPZ TO
10 NNE TOL TO 30 S DTW TO 40 WNW CLE TO 25 NNE CLE TO 10 WSW ERI.
..KERR..04/08/20
ATTN...WFO...IWX...CLE...ILN...
&&
STATUS REPORT FOR WS 84
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC001-003-009-017-033-039-049-053-069-075-085-087-091-099-103-
113-131-141-149-151-169-179-181-183-080440-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BLACKFORD
CASS DE KALB ELKHART
FULTON GRANT HUNTINGTON
JAY KOSCIUSKO LAGRANGE
LA PORTE MARSHALL MIAMI
NOBLE PULASKI ST. JOSEPH
STARKE STEUBEN WABASH
WELLS WHITE WHITLEY
$$
OHC003-005-007-011-033-039-043-051-055-063-065-069-075-077-083-
085-093-095-099-101-103-107-117-123-125-133-137-139-143-147-151-
153-155-161-169-171-173-175-080440-
OH
. OHIO COUNTIES INCLUDED ARE
ALLEN ASHLAND ASHTABULA
AUGLAIZE CRAWFORD DEFIANCE
ERIE FULTON GEAUGA
HANCOCK HARDIN HENRY
HOLMES HURON KNOX
LAKE LORAIN LUCAS
MAHONING MARION MEDINA
MERCER MORROW OTTAWA
PAULDING PORTAGE PUTNAM
RICHLAND SANDUSKY SENECA
STARK SUMMIT TRUMBULL
VAN WERT WAYNE WILLIAMS
WOOD WYANDOT
$$
PAC039-049-080440-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
CRAWFORD ERIE
$$
LEZ144-080440-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
THE ISLANDS TO VERMILION OH
$$
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.
$$
STATUS REPORT #1 ON WW 84
VALID 080245Z - 080340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW VPZ
TO 15 SSW JXN TO 40 SSE MTC TO 55 NW ERI.
..SQUITIERI..04/08/20
ATTN...WFO...IWX...CLE...ILN...
&&
STATUS REPORT FOR WS 84
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC001-003-009-017-033-039-049-053-069-075-085-087-091-099-103-
113-131-141-149-151-169-179-181-183-080340-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BLACKFORD
CASS DE KALB ELKHART
FULTON GRANT HUNTINGTON
JAY KOSCIUSKO LAGRANGE
LA PORTE MARSHALL MIAMI
NOBLE PULASKI ST. JOSEPH
STARKE STEUBEN WABASH
WELLS WHITE WHITLEY
$$
MIC059-080340-
MI
. MICHIGAN COUNTIES INCLUDED ARE
HILLSDALE
$$
OHC003-005-007-011-033-035-039-043-051-055-063-065-069-075-077-
083-085-093-095-099-101-103-107-117-123-125-133-137-139-143-147-
151-153-155-161-169-171-173-175-080340-
OH
. OHIO COUNTIES INCLUDED ARE
ALLEN ASHLAND ASHTABULA
AUGLAIZE CRAWFORD CUYAHOGA
DEFIANCE ERIE FULTON
GEAUGA HANCOCK HARDIN
HENRY HOLMES HURON
KNOX LAKE LORAIN
LUCAS MAHONING MARION
MEDINA MERCER MORROW
OTTAWA PAULDING PORTAGE
PUTNAM RICHLAND SANDUSKY
SENECA STARK SUMMIT
TRUMBULL VAN WERT WAYNE
WILLIAMS WOOD WYANDOT
$$
PAC039-049-080340-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
CRAWFORD ERIE
$$
LEZ142-143-144-145-146-147-148-149-162-163-164-165-166-167-168-
169-080340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
MAUMEE BAY TO RENO BEACH OH
RENO BEACH TO THE ISLANDS OH
THE ISLANDS TO VERMILION OH
VERMILION TO AVON POINT OH
AVON POINT TO WILLOWICK OH
WILLOWICK TO GENEVA-ON-THE LAKE OH
GENEVA-ON-THE-LAKE TO CONNEAUT OH
CONNEAUT OH TO RIPLEY NY
DETROIT RIVER LT. TO MAUMEE BAY OH TO RENO BEACH OH BEYOND 5NM
OFFSHORELINE TO US-CANADIAN BORDER
RENO BEACH TO THE ISLANDS OH BEYOND 5NM OFF SHORELINE TO
US-CANADIAN BORDER
THE ISLANDS TO VERMILION OH BEYOND 5 NM OFF SHORELINE TO
US-CANADIAN BORDER
VERMILION TO AVON POINT OH BEYOND 5 NM OFF SHORELINE TO
US-CANADIAN BORDER
AVON POINT TO WILLOWICK OH BEYOND 5 NM OFF SHORELINE TO
US-CANADIAN BORDER
WILLOWICK TO GENEVA-ON-THE-LAKE OH BEYOND 5NM OFF SHORELINE TO
US-CANADIAN BORDER
GENEVA-ON-THE-LAKE TO CONNEAUT OH BEYOND 5 NM OFF SHORELINE TO
US-CANADIAN BORDER
CONNEAUT OH TO RIPLEY NY BEYOND 5 NM OFF SHORELINE TO US-CANADIAN
BORDER
$$
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 (20%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (60%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (40%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
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.