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The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 310
NWS STORM PREDICTION CENTER NORMAN OK
745 PM EDT SUN MAY 11 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL NORTH CAROLINA
EFFECTIVE THIS SUNDAY EVENING FROM 745 PM UNTIL 1100 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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHEAST OF
RALEIGH NORTH CAROLINA TO 40 MILES SOUTHWEST OF FAYETTEVILLE
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...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 307. WATCH NUMBER 307 WILL NOT BE IN EFFECT
AFTER 745 PM EDT. CONTINUE...WW 308...WW 309...
DISCUSSION...COMPLEX SETUP ACROSS NC THIS EVENING WITH STRONG UPPER
SYSTEM AND COLD TEMPERATURES ALOFT MAINTAINING THUNDERSTORMS
SPREADING EWD ACROSS THE STATE...DESPITE EARLIER THUNDERSTORM
ACTIVITY MOVING ACROSS ERN NC. IN WAKE OF SURFACE LOW AND LEADING
TROUGH OVER ERN NC EARLY THIS EVENING...WLY WINDS AND DRYING SURFACE
CONDITIONS APPEAR TO HAVE LIMITED TORNADO POTENTIAL OVER CENTRAL NC.
HOWEVER...VERY STEEP LAPSE RATES AND 35-45 KT EFFECTIVE SHEAR
SHOULD STILL SUPPORT A FEW SUPERCELLS/ORGANIZED CLUSTERS WITH
PRIMARY THREATS OF LARGE HAIL AND ISOLATED DAMAGING WINDS FOR A FEW
MORE HOURS.
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 400. MEAN STORM
MOTION VECTOR 27035.
...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 310 SEVERE TSTM NC 112345Z - 120300Z
AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
30NE RDU/RALEIGH NC/ - 40SW FAY/FAYETTEVILLE NC/
..AVIATION COORDS.. 60NM E/W /26NE RDU - 24NE FLO/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 400. MEAN STORM MOTION VECTOR 27035.
REPLACES WW 307..NC SC VA
LAT...LON 36157713 34547815 34548061 36157965
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 310 Status Report Messages:
STATUS REPORT #2 ON WW 310
VALID 120140Z - 120240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..05/12/08
ATTN...WFO...RAH...
&&
STATUS REPORT FOR WS 310
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC007-051-063-065-069-085-093-101-105-125-127-153-163-165-183-
191-195-120240-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ANSON CUMBERLAND DURHAM
EDGECOMBE FRANKLIN HARNETT
HOKE JOHNSTON LEE
MOORE NASH RICHMOND
SAMPSON SCOTLAND WAKE
WAYNE WILSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 310
VALID 120055Z - 120140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..05/12/08
ATTN...WFO...RAH...
&&
STATUS REPORT FOR WS 310
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC001-007-037-051-063-065-069-085-093-101-105-123-125-127-135-
151-153-163-165-167-183-191-195-120140-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALAMANCE ANSON CHATHAM
CUMBERLAND DURHAM EDGECOMBE
FRANKLIN HARNETT HOKE
JOHNSTON LEE MONTGOMERY
MOORE NASH ORANGE
RANDOLPH RICHMOND SAMPSON
SCOTLAND STANLY WAKE
WAYNE WILSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (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 (70%)
|
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.
weather.gov 
