Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 290
NWS STORM PREDICTION CENTER NORMAN OK
855 PM EDT FRI MAY 9 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN NORTH CAROLINA
FAR NORTHWESTERN SOUTH CAROLINA
EASTERN TENNESSEE
EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 855 PM
UNTIL 100 AM 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 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTH OF
CROSSVILLE TENNESSEE TO 15 MILES NORTHEAST OF CHARLOTTE NORTH
CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
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 287...WW 288...WW 289...
DISCUSSION...ASCENT FROM SHORTWAVE TROUGH MOVING ACROSS THE
APPALACHIANS AND SURFACE HEATING HAS SUPPORTING INCREASE IN
THUNDERSTORMS OVER ERN TN THIS EVENING. AREA REMAINS UNDER FAIRLY
STRONG WNWLY FLOW ALOFT AND RELATIVELY COLD MID LEVEL AIR MASS.
THIS SHOULD SUSTAIN A FEW ORGANIZED STORMS...INCLUDING
SUPERCELLS...EWD ACROSS WW THROUGH THE REST OF THE EVENING. LARGE
HAIL WILL BE PRIMARY SEVERE THREAT...ALTHOUGH ISOLATED DAMAGING
WINDS ARE ALSO LIKELY WITH THE STRONGER CORES.
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 28035.
...EVANS
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 290 SEVERE TSTM NC SC TN 100055Z - 100500Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
5S CSV/CROSSVILLE TN/ - 15NE CLT/CHARLOTTE NC/
..AVIATION COORDS.. 40NM N/S /55N GQO - 12NE CLT/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 28035.
LAT...LON 36528508 36028076 34728076 35228508
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 290 Status Report Messages:
STATUS REPORT #3 ON WW 290
VALID 100320Z - 100440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 E CHA TO
15 SSW TYS TO 30 NNW HSS.
..EVANS..05/10/08
ATTN...WFO...GSP...MRX...
&&
STATUS REPORT FOR WS 290
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC003-011-021-023-025-027-035-039-043-045-059-071-075-087-089-
097-099-109-111-113-115-119-121-149-159-161-173-175-179-199-
100440-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALEXANDER AVERY BUNCOMBE
BURKE CABARRUS CALDWELL
CATAWBA CHEROKEE CLAY
CLEVELAND DAVIE GASTON
GRAHAM HAYWOOD HENDERSON
IREDELL JACKSON LINCOLN
MCDOWELL MACON MADISON
MECKLENBURG MITCHELL POLK
ROWAN RUTHERFORD SWAIN
TRANSYLVANIA UNION YANCEY
$$
SCC021-023-045-077-083-087-091-100440-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHEROKEE CHESTER GREENVILLE
PICKENS SPARTANBURG UNION
YORK
$$
TNC029-059-155-171-100440-
TN
. TENNESSEE COUNTIES INCLUDED ARE
COCKE GREENE SEVIER
UNICOI
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 290
VALID 100250Z - 100340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 848
..JEWELL..05/10/08
ATTN...WFO...GSP...MRX...
&&
STATUS REPORT FOR WS 290
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC003-011-021-023-025-027-035-039-043-045-059-071-075-087-089-
097-099-109-111-113-115-119-121-149-159-161-173-175-179-199-
100340-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALEXANDER AVERY BUNCOMBE
BURKE CABARRUS CALDWELL
CATAWBA CHEROKEE CLAY
CLEVELAND DAVIE GASTON
GRAHAM HAYWOOD HENDERSON
IREDELL JACKSON LINCOLN
MCDOWELL MACON MADISON
MECKLENBURG MITCHELL POLK
ROWAN RUTHERFORD SWAIN
TRANSYLVANIA UNION YANCEY
$$
SCC021-023-045-077-083-087-091-100340-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHEROKEE CHESTER GREENVILLE
PICKENS SPARTANBURG UNION
YORK
$$
TNC001-007-009-011-029-057-059-063-065-089-093-105-107-115-121-
123-129-139-143-145-153-155-171-173-100340-
TN
. TENNESSEE COUNTIES INCLUDED ARE
ANDERSON BLEDSOE BLOUNT
BRADLEY COCKE GRAINGER
GREENE HAMBLEN HAMILTON
JEFFERSON KNOX LOUDON
MCMINN MARION MEIGS
MONROE MORGAN POLK
RHEA ROANE SEQUATCHIE
SEVIER UNICOI UNION
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 290
VALID 100200Z - 100340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..JEWELL..05/10/08
ATTN...WFO...GSP...MRX...
&&
STATUS REPORT FOR WS 290
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC003-011-021-023-025-027-035-039-043-045-059-071-075-087-089-
097-099-109-111-113-115-119-121-149-159-161-173-175-179-199-
100340-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALEXANDER AVERY BUNCOMBE
BURKE CABARRUS CALDWELL
CATAWBA CHEROKEE CLAY
CLEVELAND DAVIE GASTON
GRAHAM HAYWOOD HENDERSON
IREDELL JACKSON LINCOLN
MCDOWELL MACON MADISON
MECKLENBURG MITCHELL POLK
ROWAN RUTHERFORD SWAIN
TRANSYLVANIA UNION YANCEY
$$
SCC021-023-045-077-083-087-091-100340-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
CHEROKEE CHESTER GREENVILLE
PICKENS SPARTANBURG UNION
YORK
$$
TNC001-007-009-011-029-057-059-063-065-089-093-105-107-115-121-
123-129-139-143-145-153-155-171-173-100340-
TN
. TENNESSEE COUNTIES INCLUDED ARE
ANDERSON BLEDSOE BLOUNT
BRADLEY COCKE GRAINGER
GREENE HAMBLEN HAMILTON
JEFFERSON KNOX LOUDON
MCMINN MARION MEIGS
MONROE MORGAN POLK
RHEA ROANE SEQUATCHIE
SEVIER UNICOI UNION
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (40%)
|
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.