Hurricane and Tropical Cyclones


Tropical Weather Discussion

axpz20 knhc 250229

Tropical weather discussion
NWS National Hurricane Center Miami FL
0405 UTC Fri Apr 25 2014

Tropical weather discussion for the eastern Pacific Ocean from 
the Equator to 32n...east of 140w. The following information is 
based on satellite observations...radar...and 
meteorological analysis.

Based on 0000 UTC surface analysis and satellite imagery through 
0245 UTC. 

...Intertropical convergence zone/monsoon trough...

No monsoon trough is present. ITCZ axis extends from 09n89w to 
06n110w to 03n125w to beyond 02n140w. Scattered moderate 
convection is from 02n to 08n between 86w and 92w...and from 03n 
to 08n between 95w and 113w. 

...Discussion...                                upper level trough is over the NW corner N of 24n W 
of 130w with upper level moisture. Another small upper level 
trough is N of 20n between 105w and 120w to include over Baja 
California and NW Mexico. In the deep upper level 
high is centered near 08n131w. Another large upper level high is 
centered near 12n100w. Upper level diffluence S of this center 
is enhancing the convection over the ITCZ between 95w and 113w. 
Further E...the western portion of another upper level ridge is 
E of 86w to include Central America E of Nicaragua with 
considerable upper level moisture. 

On the surface...a 1028 mb high is located near 35n153w.  A 
ridge axis extends se across the forecast waters to near 
18n110w. The pressure gradient between the ridge and lower 
pressure associated with the ITCZ is supporting fresh trades 
over the W central waters from 07n to 18n W of 120w with 8 to 9 
ft seas. 

Fresh to strong winds are N of the area along the California 
coast. These winds are helping to support NW seas at 8-10 ft 
which are feeding into the waters N of 28n between 117w and 
123w. These seas will subside to less than 8 ft around Fri 
afternoon...with a new set of NW swell arriving shortly 
thereafter and covering the waters N of 27n between 113w and 
132w by Sat morning.

Cross-equatorial southerly swell at 8-10 ft covers the waters   
S of a line from 03.4s85w to 00n93w to 13n110w to 13n120w to 
10n120w to 00n130w. This swell will continue to propagate to the 
N reaching the SW coast of Mexico...southern Gulf of 
California...and the Pacific coast of the Baja California 
peninsula late tonight into early Fri. Seas of 8-9 ft will cover 
the area S of a line from 18n120w to 18n110w to 10n95w to 
00n81w...except within 240 nm NE of galapagos islands...Fri 

Otherwise...expect fairly tranquil conditions in the gulfs of 
Tehuantepec...papagayo...and Panama through the next few 
days...with winds occasionally reaching fresh levels in papagayo 
during peak nocturnal drainage flow.


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