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.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 379
NWS STORM PREDICTION CENTER NORMAN OK
345 PM EDT THU JUN 11 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN AND CENTRAL NORTH CAROLINA
NORTH-CENTRAL SOUTH CAROLINA
SOUTHWESTERN VIRGINIA
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
800 PM EDT.
HAIL TO 1.5 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH
NORTHWEST OF GREENSBORO NORTH CAROLINA TO 75 MILES SOUTH OF
CHARLOTTE NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
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 375...WW 376...WW
377...WW 378...
DISCUSSION...ISOLATED STORMS HAVE DEVELOPED THIS AFTERNOON IN
ADVANCE OF BOWING MCS WITH ACTIVITY EXPECTED TO SPREAD EWD ACROSS
THE REGION THIS AFTERNOON INTO EVENING. INFLOW AIR MASS IS QUITE
MOIST AND MODERATELY UNSTABLE WITH MLCAPE OF 1000-2000 J/KG. THIS
INSTABILITY IN CONJUNCTION WITH STRENGTHENING DEEP WLY FLOW /PER
UPSTREAM VWPS/ SHOULD MAINTAIN ORGANIZED STORM STRUCTURES WITH THE
THREAT FOR DAMAGING WINDS AND SOME HAIL.
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 27030.
...MEAD/THOMPSON
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 379 SEVERE TSTM NC SC VA 111945Z - 120000Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
45NNW GSO/GREENSBORO NC/ - 75S CLT/CHARLOTTE NC/
..AVIATION COORDS.. 50NM E/W /32SE PSK - 17NNE CAE/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27030.
LAT...LON 36707916 34137990 34138200 36708131
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 379 Status Report Messages:
STATUS REPORT #2 ON WW 379
VALID 112325Z - 120000Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE CAE TO
30 SE CLT TO 30 S PSK.
WW 379 IS SCHEDULED TO EXPIRE AT 120000Z.
..GRAMS..06/11/09
ATTN...WFO...RAH...GSP...RNK...CAE...
&&
STATUS REPORT FOR WS 379
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC001-007-025-033-057-059-067-081-123-125-151-153-157-159-167-
169-171-179-197-120000-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALAMANCE ANSON CABARRUS
CASWELL DAVIDSON DAVIE
FORSYTH GUILFORD MONTGOMERY
MOORE RANDOLPH RICHMOND
ROCKINGHAM ROWAN STANLY
STOKES SURRY UNION
YADKIN
$$
SCC025-055-061-120000-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHESTERFIELD KERSHAW LEE
$$
VAC005-023-045-063-067-071-089-141-143-515-580-590-690-770-775-
120000-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALLEGHANY BOTETOURT CRAIG
FLOYD FRANKLIN GILES
HENRY PATRICK PITTSYLVANIA
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
BEDFORD COVINGTON DANVILLE
MARTINSVILLE ROANOKE SALEM
$$
WVC025-063-120000-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
GREENBRIER MONROE
$$
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.
$$
STATUS REPORT #1 ON WW 379
VALID 112230Z - 112340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 WNW CAE
TO 25 WSW CLT TO 35 SW PSK.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1058.
..GRAMS..06/11/09
ATTN...WFO...RAH...GSP...RNK...CAE...
&&
STATUS REPORT FOR WS 379
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC001-003-007-025-033-035-057-059-067-071-081-097-109-119-123-
125-151-153-157-159-167-169-171-179-197-112340-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALAMANCE ALEXANDER ANSON
CABARRUS CASWELL CATAWBA
DAVIDSON DAVIE FORSYTH
GASTON GUILFORD IREDELL
LINCOLN MECKLENBURG MONTGOMERY
MOORE RANDOLPH RICHMOND
ROCKINGHAM ROWAN STANLY
STOKES SURRY UNION
YADKIN
$$
SCC023-025-039-055-057-061-071-091-112340-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHESTER CHESTERFIELD FAIRFIELD
KERSHAW LANCASTER LEE
NEWBERRY YORK
$$
VAC005-021-023-035-045-063-067-071-089-121-141-143-155-197-515-
580-590-640-690-750-770-775-112340-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALLEGHANY BLAND BOTETOURT
CARROLL CRAIG FLOYD
FRANKLIN GILES HENRY
MONTGOMERY PATRICK PITTSYLVANIA
PULASKI WYTHE
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
BEDFORD COVINGTON DANVILLE
GALAX MARTINSVILLE RADFORD
ROANOKE SALEM
$$
WVC025-055-063-089-112340-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
GREENBRIER MERCER MONROE
SUMMERS
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (40%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (20%)
|
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.