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 360
NWS STORM PREDICTION CENTER NORMAN OK
755 PM CDT TUE JUN 9 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHEAST ARKANSAS
BOOTHEEL OF MISSOURI
EFFECTIVE THIS TUESDAY NIGHT FROM 755 PM UNTIL MIDNIGHT CDT.
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 35
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST OF
WALNUT RIDGE ARKANSAS TO 65 MILES EAST NORTHEAST OF JONESBORO
ARKANSAS. 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 356...WW 357...WW
358...WW 359...
DISCUSSION...AN INTENSE SUPERCELL OVER SOUTHERN MO WILL TRACK
SOUTHEASTWARD INTO NORTHEAST AR DURING THE NEXT FEW HOURS...ALONG
WITH OTHER ACTIVITY MOVING INTO THE MO BOOTHEEL. AIRMASS REMAINS
VERY UNSTABLE...WITH SUFFICIENT VERTICAL SHEAR FOR THE RISK OF LARGE
HAIL AND DAMAGING WINDS.
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 500. MEAN STORM
MOTION VECTOR 31025.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 360 SEVERE TSTM AR MO 100055Z - 100500Z
AXIS..35 STATUTE MILES NORTH AND SOUTH OF LINE..
20W ARG/WALNUT RIDGE AR/ - 65ENE JBR/JONESBORO AR/
..AVIATION COORDS.. 30NM N/S /16W ARG - 16NW DYR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 31025.
LAT...LON 36639129 36688956 35688956 35619129
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 360 Status Report Messages:
STATUS REPORT #1 ON WW 360
VALID 100335Z - 100440Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..SPC..06/10/09
ATTN...WFO...MEG...
&&
STATUS REPORT FOR WS 360
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC021-031-055-075-093-121-100440-
AR
. ARKANSAS COUNTIES INCLUDED ARE
CLAY CRAIGHEAD GREENE
LAWRENCE MISSISSIPPI RANDOLPH
$$
MOC069-155-100440-
MO
. MISSOURI COUNTIES INCLUDED ARE
DUNKLIN PEMISCOT
$$
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 
