Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 87
NWS STORM PREDICTION CENTER NORMAN OK
105 PM EDT MON APR 20 2015
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
EASTERN FLORIDA
COASTAL WATERS
* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 105 PM UNTIL
700 PM EDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
SUMMARY...THUNDERSTORMS ARE FORMING OVER THE CENTRAL PENINSULA...AND
WILL LIKELY TRACK EASTWARD AND AFFECT THE EASTERN SHORES THIS
AFTERNOON. STRONG WINDS ALOFT AND AMPLE MOISTURE/INSTABILITY WILL
PROMOTE A FEW SEVERE STORMS CAPABLE OF HAIL AND DAMAGING WINDS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 35
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES WEST
NORTHWEST OF DAYTONA BEACH FLORIDA TO 20 MILES SOUTHEAST OF MIAMI
FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
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 86...
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 27025.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 87 SEVERE TSTM FL CW 201705Z - 202300Z
AXIS..35 STATUTE MILES EAST AND WEST OF LINE..
25WNW DAB/DAYTONA BEACH FL/ - 20SE MIA/MIAMI FL/
..AVIATION COORDS.. 30NM E/W /17W OMN - 18SE MIA/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27025.
LAT...LON 29318084 25597948 25598061 29318201
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 87 Status Report Messages:
STATUS REPORT #2 ON WW 87
VALID 202240Z - 202340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NNW AGR
TO 25 ESE DAB.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 403
..COHEN..04/20/15
ATTN...WFO...MLB...MFL...
&&
STATUS REPORT FOR WS 87
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC009-061-085-093-095-097-111-117-202340-
FL
. FLORIDA COUNTIES INCLUDED ARE
BREVARD INDIAN RIVER MARTIN
OKEECHOBEE ORANGE OSCEOLA
ST. LUCIE SEMINOLE
$$
AMZ552-555-202340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
VOLUSIA-BREVARD COUNTY LINE TO SEBASTIAN INLET 0-20 NM
SEBASTIAN INLET TO JUPITER INLET 0-20 NM
$$
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.
$$
STATUS REPORT #1 ON WW 87
VALID 201835Z - 201940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..JEWELL..04/20/15
ATTN...WFO...MLB...MFL...
&&
STATUS REPORT FOR WS 87
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC009-011-061-069-085-086-093-095-097-099-111-117-127-201940-
FL
. FLORIDA COUNTIES INCLUDED ARE
BREVARD BROWARD INDIAN RIVER
LAKE MARTIN MIAMI-DADE
OKEECHOBEE ORANGE OSCEOLA
PALM BEACH ST. LUCIE SEMINOLE
VOLUSIA
$$
AMZ550-552-555-610-630-650-651-201940-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
FLAGLER BEACH TO VOLUSIA-BREVARD COUNTY LINE 0-20 NM
VOLUSIA-BREVARD COUNTY LINE TO SEBASTIAN INLET 0-20 NM
SEBASTIAN INLET TO JUPITER INLET 0-20 NM
LAKE OKEECHOBEE
BISCAYNE BAY
COASTAL WATERS FROM JUPITER INLET TO DEERFIELD BEACH FL OUT 20 NM
COASTAL WATERS FROM DEERFIELD BEACH TO OCEAN REEF FL OUT 20 NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
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.