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 85
NWS STORM PREDICTION CENTER NORMAN OK
110 AM CDT MON APR 20 2015
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN ALABAMA
NORTHWESTERN GEORGIA
MIDDLE AND EASTERN TENNESSEE
* EFFECTIVE THIS MONDAY MORNING FROM 110 AM UNTIL 700 AM CDT.
* PRIMARY THREATS INCLUDE...
ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
SUMMARY...WIND-DAMAGE THREAT IS EXPECTED TO CONTINUE WITH SQUALL
LINE CROSSING WATCH AREA FROM WEST TO EAST...THOUGH RISK SHOULD
DIMINISH IN A FEW HOURS AS THE ACTIVITY MOVES INTO A MORE STABLE AIR
MASS. SEE SPC MESOSCALE DISCUSSION 391 FOR INITIAL METEOROLOGICAL
REASONING.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST
SOUTHWEST OF GADSDEN ALABAMA TO 50 MILES NORTH NORTHWEST OF
CROSSVILLE TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 84...
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 500. MEAN STORM
MOTION VECTOR 26035.
...EDWARDS
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW5
WW 85 SEVERE TSTM AL GA TN 200610Z - 201200Z
AXIS..75 STATUTE MILES EAST AND WEST OF LINE..
40WSW GAD/GADSDEN AL/ - 50NNW CSV/CROSSVILLE TN/
..AVIATION COORDS.. 65NM E/W /10ENE VUZ - 52ESE BWG/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26035.
LAT...LON 33748802 36618677 36618406 33748541
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU5.
Watch 85 Status Report Messages:
STATUS REPORT #1 ON WW 85
VALID 200830Z - 200940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE BHM TO
30 SW CSV TO 45 N CSV.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 393
..GUYER..04/20/15
ATTN...WFO...BMX...HUN...FFC...MRX...OHX...
&&
STATUS REPORT FOR WS 85
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC019-049-055-071-200940-
AL
. ALABAMA COUNTIES INCLUDED ARE
CHEROKEE DEKALB ETOWAH
JACKSON
$$
GAC047-055-083-115-129-295-313-200940-
GA
. GEORGIA COUNTIES INCLUDED ARE
CATOOSA CHATTOOGA DADE
FLOYD GORDON WALKER
WHITFIELD
$$
TNC001-007-011-013-035-049-061-065-107-115-121-129-133-137-143-
145-151-153-175-185-200940-
TN
. TENNESSEE COUNTIES INCLUDED ARE
ANDERSON BLEDSOE BRADLEY
CAMPBELL CUMBERLAND FENTRESS
GRUNDY HAMILTON MCMINN
MARION MEIGS MORGAN
OVERTON PICKETT RHEA
ROANE SCOTT SEQUATCHIE
VAN BUREN WHITE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (50%)
|
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 
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