Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 838
NWS STORM PREDICTION CENTER NORMAN OK
310 PM EDT MON AUG 18 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN AND CENTRAL MAINE
NORTHERN NEW HAMPSHIRE
CENTRAL AND NORTHERN NEW YORK
VERMONT
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 310 PM UNTIL
1000 PM EDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST
OF SYRACUSE NEW YORK TO 25 MILES NORTH OF HOULTON MAINE. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU8).
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 837...
DISCUSSION...THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER CENTRAL NY IN
REGION OF MODERATE INSTABILITY...AND AHEAD OF WEAK SHORTWAVE TROUGH
OVER NORTHERN OH. THIS ACTIVITY WILL LIKELY DEVELOP EASTWARD ACROSS
PARTS OF VT/NH DURING THE NEXT FEW HOURS WITH A RISK OF HAIL IN
STRONGER CELLS. ANOTHER MORE ORGANIZED LINE OF THUNDERSTORMS WILL
BEGIN AFFECTING NORTHERN ME IN THE NEXT FEW HOURS WITH A RISK OF
DAMAGING WINDS AND HAIL. THIS LINE WILL SAG SOUTHWARD THROUGH THE
EVENING INTO MUCH OF THE REMAINDER OF THE WATCH AREA.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 26030.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW8
WW 838 SEVERE TSTM ME NH NY VT 181910Z - 190200Z
AXIS..65 STATUTE MILES NORTH AND SOUTH OF LINE..
25SW SYR/SYRACUSE NY/ - 25N HUL/HOULTON ME/
..AVIATION COORDS.. 55NM N/S /21SSW SYR - 21SE PQI/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 26030.
LAT...LON 43797647 47416780 45546780 41917647
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 838 Status Report Messages:
STATUS REPORT #5 ON WW 838
VALID 190130Z - 190200Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NNW BTV
TO 25 NNW BML TO 25 N HUL.
REMAINING VALID PORTION OF WW 838 MAY BE ALLOWED TO EXPIRE AT
19/02Z.
..KERR..08/19/08
ATTN...WFO...CAR...GYX...ALY...BGM...BUF...BTV...
&&
STATUS REPORT FOR WS 838
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MEC007-017-025-190200-
ME
. MAINE COUNTIES INCLUDED ARE
FRANKLIN OXFORD SOMERSET
$$
NHC003-007-009-190200-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CARROLL COOS GRAFTON
$$
NYC001-011-019-031-033-035-041-043-045-049-053-057-065-067-075-
083-089-091-093-095-099-113-115-123-190200-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALBANY CAYUGA CLINTON
ESSEX FRANKLIN FULTON
HAMILTON HERKIMER JEFFERSON
LEWIS MADISON MONTGOMERY
ONEIDA ONONDAGA OSWEGO
RENSSELAER ST. LAWRENCE SARATOGA
SCHENECTADY SCHOHARIE SENECA
WARREN WASHINGTON YATES
$$
VTC001-003-005-007-009-011-013-015-017-019-021-023-025-027-
190200-
VT
. VERMONT COUNTIES INCLUDED ARE
ADDISON BENNINGTON CALEDONIA
CHITTENDEN ESSEX FRANKLIN
GRAND ISLE LAMOILLE ORANGE
ORLEANS RUTLAND WASHINGTON
WINDHAM WINDSOR
$$
SLZ022-190200-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
ST. LAWRENCE RIVER ABOVE OGDENSBURG NY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 838
VALID 190030Z - 190140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/19/08
ATTN...WFO...CAR...GYX...ALY...BGM...BUF...BTV...
&&
STATUS REPORT FOR WS 838
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MEC003-007-017-019-021-025-190140-
ME
. MAINE COUNTIES INCLUDED ARE
AROOSTOOK FRANKLIN OXFORD
PENOBSCOT PISCATAQUIS SOMERSET
$$
NHC003-007-009-190140-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CARROLL COOS GRAFTON
$$
NYC001-011-019-031-033-035-041-043-045-049-053-057-065-067-075-
083-089-091-093-095-099-113-115-123-190140-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALBANY CAYUGA CLINTON
ESSEX FRANKLIN FULTON
HAMILTON HERKIMER JEFFERSON
LEWIS MADISON MONTGOMERY
ONEIDA ONONDAGA OSWEGO
RENSSELAER ST. LAWRENCE SARATOGA
SCHENECTADY SCHOHARIE SENECA
WARREN WASHINGTON YATES
$$
VTC001-003-005-007-009-011-013-015-017-019-021-023-025-027-
190140-
VT
. VERMONT COUNTIES INCLUDED ARE
ADDISON BENNINGTON CALEDONIA
CHITTENDEN ESSEX FRANKLIN
GRAND ISLE LAMOILLE ORANGE
ORLEANS RUTLAND WASHINGTON
WINDHAM WINDSOR
$$
SLZ022-190140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
ST. LAWRENCE RIVER ABOVE OGDENSBURG NY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 838
VALID 182330Z - 190040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/18/08
ATTN...WFO...CAR...GYX...ALY...BGM...BUF...BTV...
&&
STATUS REPORT FOR WS 838
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MEC003-007-017-019-021-025-190040-
ME
. MAINE COUNTIES INCLUDED ARE
AROOSTOOK FRANKLIN OXFORD
PENOBSCOT PISCATAQUIS SOMERSET
$$
NHC003-007-009-190040-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CARROLL COOS GRAFTON
$$
NYC001-011-019-031-033-035-041-043-045-049-053-057-065-067-075-
083-089-091-093-095-099-113-115-123-190040-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALBANY CAYUGA CLINTON
ESSEX FRANKLIN FULTON
HAMILTON HERKIMER JEFFERSON
LEWIS MADISON MONTGOMERY
ONEIDA ONONDAGA OSWEGO
RENSSELAER ST. LAWRENCE SARATOGA
SCHENECTADY SCHOHARIE SENECA
WARREN WASHINGTON YATES
$$
VTC001-003-005-007-009-011-013-015-017-019-021-023-025-027-
190040-
VT
. VERMONT COUNTIES INCLUDED ARE
ADDISON BENNINGTON CALEDONIA
CHITTENDEN ESSEX FRANKLIN
GRAND ISLE LAMOILLE ORANGE
ORLEANS RUTLAND WASHINGTON
WINDHAM WINDSOR
$$
SLZ022-190040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
ST. LAWRENCE RIVER ABOVE OGDENSBURG NY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 838
VALID 182240Z - 182340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/18/08
ATTN...WFO...CAR...GYX...ALY...BGM...BUF...BTV...
&&
STATUS REPORT FOR WS 838
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MEC003-007-017-019-021-025-182340-
ME
. MAINE COUNTIES INCLUDED ARE
AROOSTOOK FRANKLIN OXFORD
PENOBSCOT PISCATAQUIS SOMERSET
$$
NHC003-007-009-182340-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CARROLL COOS GRAFTON
$$
NYC001-007-011-015-017-019-023-025-031-033-035-041-043-045-049-
053-057-065-067-075-077-083-089-091-093-095-097-099-101-107-109-
113-115-123-182340-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALBANY BROOME CAYUGA
CHEMUNG CHENANGO CLINTON
CORTLAND DELAWARE ESSEX
FRANKLIN FULTON HAMILTON
HERKIMER JEFFERSON LEWIS
MADISON MONTGOMERY ONEIDA
ONONDAGA OSWEGO OTSEGO
RENSSELAER ST. LAWRENCE SARATOGA
SCHENECTADY SCHOHARIE SCHUYLER
SENECA STEUBEN TIOGA
TOMPKINS WARREN WASHINGTON
YATES
$$
VTC001-003-005-007-009-011-013-015-017-019-021-023-025-027-
182340-
VT
. VERMONT COUNTIES INCLUDED ARE
ADDISON BENNINGTON CALEDONIA
CHITTENDEN ESSEX FRANKLIN
GRAND ISLE LAMOILLE ORANGE
ORLEANS RUTLAND WASHINGTON
WINDHAM WINDSOR
$$
SLZ022-182340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
ST. LAWRENCE RIVER ABOVE OGDENSBURG NY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 838
VALID 182150Z - 182240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..08/18/08
ATTN...WFO...CAR...GYX...ALY...BGM...BUF...BTV...
&&
STATUS REPORT FOR WS 838
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MEC003-007-017-019-021-025-182240-
ME
. MAINE COUNTIES INCLUDED ARE
AROOSTOOK FRANKLIN OXFORD
PENOBSCOT PISCATAQUIS SOMERSET
$$
NHC003-007-009-182240-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CARROLL COOS GRAFTON
$$
NYC001-007-011-015-017-019-023-025-031-033-035-041-043-045-049-
053-057-065-067-075-077-083-089-091-093-095-097-099-101-107-109-
113-115-123-182240-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALBANY BROOME CAYUGA
CHEMUNG CHENANGO CLINTON
CORTLAND DELAWARE ESSEX
FRANKLIN FULTON HAMILTON
HERKIMER JEFFERSON LEWIS
MADISON MONTGOMERY ONEIDA
ONONDAGA OSWEGO OTSEGO
RENSSELAER ST. LAWRENCE SARATOGA
SCHENECTADY SCHOHARIE SCHUYLER
SENECA STEUBEN TIOGA
TOMPKINS WARREN WASHINGTON
YATES
$$
VTC001-003-005-007-009-011-013-015-017-019-021-023-025-027-
182240-
VT
. VERMONT COUNTIES INCLUDED ARE
ADDISON BENNINGTON CALEDONIA
CHITTENDEN ESSEX FRANKLIN
GRAND ISLE LAMOILLE ORANGE
ORLEANS RUTLAND WASHINGTON
WINDHAM WINDSOR
$$
SLZ022-182240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
ST. LAWRENCE RIVER ABOVE OGDENSBURG NY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (20%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
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 (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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% (F2-F5 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.