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.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 277
NWS STORM PREDICTION CENTER NORMAN OK
805 AM CDT THU MAY 8 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHWEST ALABAMA
NORTHEAST MISSISSIPPI
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 805 AM UNTIL
200 PM CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
MUSCLE SHOALS ALABAMA TO 55 MILES SOUTHEAST OF GREENWOOD
MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
DISCUSSION...THUNDERSTORM CLUSTER OVER NE MS IS DEVELOPING SUPERCELL
CHARACTERISTICS AS THE LOW LEVELS MOISTENING/DESTABILIZE NEWD FROM
CENTRAL MS INTO NW AL. ADDITIONAL CONVECTION IS ALSO BEGINNING TO
DEVELOP ALONG THE WIND SHIFT NEAR THE MS RIVER. GIVEN THE LOW-LEVEL
DESTABILIZATION AND EXPECTED PERSISTENCE OF 45-55 KT SWLY LOW-LEVEL
FLOW AND RELATIVELY STRONG LOW-LEVEL SHEAR IN ADVANCE OF THE MID
LEVEL TROUGH IN AR...THE THREAT FOR SUPERCELLS AND A COUPLE OF
TORNADOES WILL LIKELY CONTINUE THROUGH AT LEAST MIDDAY.
OTHERWISE...DAMAGING WINDS AND LARGE HAIL CAN BE EXPECTED WITH THE
STRONGER STORMS.
AVIATION...TORNADOES AND 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
500. MEAN STORM MOTION VECTOR 25035.
...THOMPSON
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 277
NWS STORM PREDICTION CENTER NORMAN OK
805 AM CDT THU MAY 8 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHWEST ALABAMA
NORTHEAST MISSISSIPPI
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 805 AM UNTIL
200 PM CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF
MUSCLE SHOALS ALABAMA TO 55 MILES SOUTHEAST OF GREENWOOD
MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
DISCUSSION...THUNDERSTORM CLUSTER OVER NE MS IS DEVELOPING SUPERCELL
CHARACTERISTICS AS THE LOW LEVELS MOISTENING/DESTABILIZE NEWD FROM
CENTRAL MS INTO NW AL. ADDITIONAL CONVECTION IS ALSO BEGINNING TO
DEVELOP ALONG THE WIND SHIFT NEAR THE MS RIVER. GIVEN THE LOW-LEVEL
DESTABILIZATION AND EXPECTED PERSISTENCE OF 45-55 KT SWLY LOW-LEVEL
FLOW AND RELATIVELY STRONG LOW-LEVEL SHEAR IN ADVANCE OF THE MID
LEVEL TROUGH IN AR...THE THREAT FOR SUPERCELLS AND A COUPLE OF
TORNADOES WILL LIKELY CONTINUE THROUGH AT LEAST MIDDAY.
OTHERWISE...DAMAGING WINDS AND LARGE HAIL CAN BE EXPECTED WITH THE
STRONGER STORMS.
AVIATION...TORNADOES AND 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
500. MEAN STORM MOTION VECTOR 25035.
...THOMPSON
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 277 TORNADO AL MS 081305Z - 081900Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
15NNE MSL/MUSCLE SHOALS AL/ - 55SE GWO/GREENWOOD MS/
..AVIATION COORDS.. 75NM E/W /15N MSL - 45NW MEI/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 25035.
LAT...LON 34938601 32938794 32939087 34938901
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 277 Status Report Messages:
STATUS REPORT #2 ON WW 277
VALID 081830Z - 081900Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 NNW MEI
TO 25 NNW HSV.
REMAINING VALID PORTION OF WW 277 MAY BE ALLOWED TO EXPIRE AT
08/19Z.
..KERR..05/08/08
ATTN...WFO...HUN...BMX...MEG...JAN...
&&
STATUS REPORT FOR WT 277
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC057-059-075-079-083-093-133-081900-
AL
. ALABAMA COUNTIES INCLUDED ARE
FAYETTE FRANKLIN LAMAR
LAWRENCE LIMESTONE MARION
WINSTON
$$
MSC087-105-159-081900-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
LOWNDES OKTIBBEHA WINSTON
$$
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.
$$
STATUS REPORT #1 ON WW 277
VALID 081430Z - 081540Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..05/08/08
ATTN...WFO...HUN...BMX...MEG...JAN...
&&
STATUS REPORT FOR WT 277
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC033-043-057-059-075-077-079-083-089-093-103-107-125-127-133-
081540-
AL
. ALABAMA COUNTIES INCLUDED ARE
COLBERT CULLMAN FAYETTE
FRANKLIN LAMAR LAUDERDALE
LAWRENCE LIMESTONE MADISON
MARION MORGAN PICKENS
TUSCALOOSA WALKER WINSTON
$$
MSC003-007-013-015-017-019-025-043-051-053-057-071-081-083-087-
095-097-103-105-115-117-135-139-141-145-155-159-161-081540-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
ALCORN ATTALA CALHOUN
CARROLL CHICKASAW CHOCTAW
CLAY GRENADA HOLMES
HUMPHREYS ITAWAMBA LAFAYETTE
LEE LEFLORE LOWNDES
MONROE MONTGOMERY NOXUBEE
OKTIBBEHA PONTOTOC PRENTISS
TALLAHATCHIE TIPPAH TISHOMINGO
UNION WEBSTER WINSTON
YALOBUSHA
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (40%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
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
|
Mod (30%)
|
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.
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