Thread: Tropical Storm Calvin - SSW of the baja

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wtpz33 knhc 081458
tcpep3

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tropical storm calvin advisory number 5
nws national hurricane center miami fl ep032011
800 am pdt fri jul 08 2011

...calvin nearing hurricane intensity...


Summary of 800 am pdt...1500 utc...information
----------------------------------------------
location...16.2n 107.6w
about 290 mi...470 km sw of manzanillo mexico
maximum sustained winds...70 mph...110 km/h
present movement...w or 275 degrees at 17 mph...28 km/h
minimum central pressure...997 mb...29.44 inches


watches and warnings
--------------------
there are no coastal watches or warnings in effect.


Discussion and 48-hour outlook
------------------------------
at 800 am pdt...1500 utc...the center of tropical storm calvin was
located near latitude 16.2 north...longitude 107.6 west. Calvin is
moving toward the west near 17 mph...28 km/h...and the cyclone
should decrease in forward speed during the next two days.

Maximum sustained winds have increase to near 70 mph...110
km/h...with higher gusts. Calvin could become a hurricane
today...but some weakening should begin on saturday.

Tropical storm force winds extend outward up to 70 miles...110 km
from the center.

Estimated minimum central pressure is 997 mb...29.44 inches.


Hazards affecting land
----------------------
none.


Next advisory
-------------
next complete advisory...200 pm pdt.

$$
forecaster landsea/avila

Hurricane Calvin

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wtpz33 knhc 082040
tcpep3

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hurricane calvin advisory number 6
nws national hurricane center miami fl ep032011
200 pm pdt fri jul 08 2011

...calvin becomes the third hurricane of the 2011 eastern pacific
hurricane season...


Summary of 200 pm pdt...2100 utc...information
----------------------------------------------
location...16.3n 108.5w
about 340 mi...545 km ssw of cabo corrientes mexico
maximum sustained winds...75 mph...120 km/h
present movement...w or 275 degrees at 13 mph...20 km/h
minimum central pressure...987 mb...29.15 inches


watches and warnings
--------------------
there are no coastal watches or warnings in effect.


discussion and 48-hour outlook
------------------------------
at 200 pm pdt...2100 utc...the center of recently upgraded hurricane
calvin was located near latitude 16.3 north...longitude 108.5 west.
Calvin is moving toward the west near 13 mph...20 km/h...and this
motion is expected to continue until sunday.

Maximum sustained winds have increased to near 75 mph...120
km/h...with higher gusts. Calvin is a category one hurricane on the
saffir-simpson scale. some fluctuations in intensity are likely
today...but the general trend is for calvin to weaken.

Hurricane-force winds extend outward up to 25 miles...35 km...from
the center...and tropical storm force winds extend outward up to 85
miles...140 km.

Estimated minimum central pressure is 987 mb...29.15 inches.


Hazards affecting land
----------------------
none.


Next advisory
-------------
next complete advisory...800 pm pdt.

$$
forecaster avila

Calvin did become a Category 1 hurricane ... but has now weakened back down to a low end tropical storm

000
wtpz33 knhc 092035
tcpep3

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tropical storm calvin advisory number 10
nws national hurricane center miami fl ep032011
200 pm pdt sat jul 09 2011

...calvin continues to weaken rapidly...


Summary of 200 pm pdt...2100 utc...information
----------------------------------------------
location...17.4n 111.7w
about 400 mi...640 km ssw of the southern tip of baja california
maximum sustained winds...45 mph...75 km/h
present movement...wnw or 285 degrees at 9 mph...15 km/h
minimum central pressure...1000 mb...29.53 inches


watches and warnings
--------------------
there are no coastal watches or warnings in effect.


Discussion and 48-hour outlook
------------------------------
at 200 pm pdt...2100 utc...the center of tropical storm calvin was
located near latitude 17.4 north...longitude 111.7 west. Calvin is
moving toward the west-northwest near 9 mph...15 km/h...and this
motion is expected to continue for the next couple of days.

Maximum sustained winds have decreased to near 45 mph...75 km/h...
With higher gusts. Additional weakening is expected in the next 48
hours and calvin is expected to become a tropical depression
tonight or early sunday and dissipate by monday night or tuesday.

Tropical-storm-force winds extend outward up to 50 miles...85 km
from the center.

Estimated minimum central pressure is 1000 mb...29.53 inches.


Hazards affecting land
----------------------
none.


Next advisory
-------------
next complete advisory...800 pm pdt.

$$
forecaster brennan