Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL5
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 255
NWS STORM PREDICTION CENTER NORMAN OK
1235 PM CDT WED MAY 6 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF SOUTHWEST ALABAMA
PARTS OF NORTHEAST LOUISIANA
PARTS OF CENTRAL AND SOUTHERN MISSISSIPPI
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL
700 PM CDT.
HAIL TO 2.5 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 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES EAST OF
SELMA ALABAMA TO 30 MILES WEST NORTHWEST OF NATCHEZ MISSISSIPPI.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).
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 252...WW 254...
DISCUSSION...E/W LINE OF STRONG/SEVERE THUNDERSTORMS ACROSS NRN
PORTION OF WATCH WILL LIKELY INCREASE IN INTENSITY WITH CONTINUED
HEATING/DESTABILIZATION IN WARM SECTOR. 30-40KT OF DEEP LAYER SHEAR
SUPPORTS DEVELOPMENT OF SHORT LINE SEGMENTS AND ISOLATED SUPERCELLS
ENHANCING SEVERE THREAT. ACTIVITY SHOULD WORK SLOWLY SWD THRU THE
AFTERNOON.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 24025.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW5
WW 255 SEVERE TSTM AL LA MS 061735Z - 070000Z
AXIS..50 STATUTE MILES NORTH AND SOUTH OF LINE..
5E SEM/SELMA AL/ - 30WNW HEZ/NATCHEZ MS/
..AVIATION COORDS.. 45NM N/S /30WNW MGM - 46SSE MLU/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24025.
LAT...LON 31628688 31059176 32509176 33068688
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU5.
Watch 255 Status Report Messages:
STATUS REPORT #3 ON WW 255
VALID 062245Z - 062340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WNW GZH
TO 30 SSE SEM.
..GUYER..05/06/09
ATTN...WFO...MOB...JAN...LIX...
&&
STATUS REPORT FOR WS 255
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC039-041-062340-
AL
. ALABAMA COUNTIES INCLUDED ARE
COVINGTON CRENSHAW
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 255
VALID 062035Z - 062140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 WSW HEZ
TO 25 SW SEM TO 10 NNE SEM.
..DIAL..05/06/09
ATTN...WFO...MOB...JAN...LIX...
&&
STATUS REPORT FOR WS 255
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC013-025-035-041-099-129-131-062140-
AL
. ALABAMA COUNTIES INCLUDED ARE
BUTLER CLARKE CONECUH
CRENSHAW MONROE WASHINGTON
WILCOX
$$
LAC029-062140-
LA
. LOUISIANA PARISHES INCLUDED ARE
CONCORDIA
$$
MSC001-005-031-035-037-041-065-067-073-077-085-091-111-113-147-
153-157-062140-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
ADAMS AMITE COVINGTON
FORREST FRANKLIN GREENE
JEFFERSON DAVIS JONES LAMAR
LAWRENCE LINCOLN MARION
PERRY PIKE WALTHALL
WAYNE WILKINSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 255
VALID 061940Z - 062040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W HEZ TO
45 W SEM TO 35 ESE TCL.
..DIAL..05/06/09
ATTN...WFO...MOB...JAN...LIX...
&&
STATUS REPORT FOR WS 255
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC013-023-025-035-041-099-129-131-062040-
AL
. ALABAMA COUNTIES INCLUDED ARE
BUTLER CHOCTAW CLARKE
CONECUH CRENSHAW MONROE
WASHINGTON WILCOX
$$
LAC025-029-062040-
LA
. LOUISIANA PARISHES INCLUDED ARE
CATAHOULA CONCORDIA
$$
MSC001-005-023-029-031-035-037-041-061-063-065-067-073-077-085-
091-111-113-127-129-147-153-157-062040-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
ADAMS AMITE CLARKE
COPIAH COVINGTON FORREST
FRANKLIN GREENE JASPER
JEFFERSON JEFFERSON DAVIS JONES
LAMAR LAWRENCE LINCOLN
MARION PERRY PIKE
SIMPSON SMITH WALTHALL
WAYNE WILKINSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
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 
