Seguimento América do Norte - 2013

CptRena

Nimbostratus
Registo
16 Fev 2011
Mensagens
1,510
Local
Gafanha da Encarnação, Aveiro
Aviso de trovoadas severas

http://www.spc.noaa.gov/products/watch/ww0179.html


SEL9

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 179
NWS STORM PREDICTION CENTER NORMAN OK
1255 PM EDT SUN MAY 19 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN FLORIDA
CENTRAL AND SOUTHERN GEORGIA

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL
700 PM EDT.

* PRIMARY THREATS INCLUDE...
SEVERAL DAMAGING WIND GUSTS TO 60 MPH POSSIBLE
A FEW LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF
MACON GEORGIA TO 35 MILES EAST SOUTHEAST OF VALDOSTA GEORGIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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.

&&

DISCUSSION...WEAK TO MODEST DEEP LAYER SHEAR BENEATH NORTHERLY
MID/UPPER FLOW HAS CONTRIBUTED TO THE EVOLUTION OF AN ORGANIZING
MESOSCALE CONVECTIVE SYSTEM TO THE SOUTH OF ATLANTA...WHERE LATEST
VWP DATA INDICATE THE DEVELOPMENT OF A 30-40 KT REAR INFLOW JET.
WITH FURTHER HEATING OF A MOIST BOUNDARY LAYER ACROSS CENTRAL AND
SOUTHERN GEORGIA INTO NORTHERN FLORIDA...ADDITIONAL STORM AND
SURFACE COLD POOL INTENSIFICATION AND SOUTHWARD ACCELERATION IS
EXPECTED THIS AFTERNOON. SOME HAIL IS POSSIBLE...BUT POTENTIALLY
DAMAGING WIND GUSTS APPEAR THE PRIMARY SEVERE THREAT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 33035.


...KERR
 

Felipe Freitas

Cumulonimbus
Registo
11 Fev 2012
Mensagens
3,766
Local
Florianópolis, Santa Catarina, Brasil
Risco Moderado
http://www.spc.noaa.gov/products/outlook/day1otlk.html

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Watches
http://www.spc.noaa.gov/products/watch/
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