Atlantic Invest 92L Likely Depression

By: Dr. Jeff Masters, 8:08 PM GMT on July 21, 2014

(By Steve Gregory - Substituting for Dr. Masters who is on Vacation.)

SPECIAL UPDATE

Latest VIS and IR imagery suggests INVEST 92L is now a Tropical Depression, though NHC has not yet ‘called it’.



Fig 1: Latest VIS image of INVEST 92 about 1,200 NM east of the Lesser Antilles.

The low level circulation near 11.1N / 43.5W (about 1,200NM east of the Lesser Antilles) appears ‘closed’, with significant, t...

Atlantic ‘Wakes-Up’ / Typhoon Matmo Heads For Taiwan

By: Dr. Jeff Masters, 3:40 PM GMT on July 21, 2014

ATLANTIC ‘WAKES-UP’ / TYPHOON MATMO HEADS FOR TAIWAN


(By Steve Gregory - Substituting for Dr. Masters who is on Vacation.)

Morning VIS imagery shows a well defined low level closed circulation has formed about 1,200 NM east of the CARIB near 11.6N / 42.6W and is westbound (280ᵒ) at 20Kts – and is now being carried by NHC as INVEST 92L.



Fig 1: A relatively small but well-defined Low level circulation has ...

Updated: 5:52 PM GMT on July 21, 2014

MATMO SLOWLY INTENSIFIES

By: Dr. Jeff Masters, 11:55 PM GMT on July 20, 2014

TYPHOON MATMO HEADS FOR TAIWAN / ATLANTIC STIRRING

(By Steve Gregory - Substituting for Dr. Masters who is on Vacation.)


Typhoon MATMO is located about 650 NM SSE of Taipei and is now heading NNW at 12Kts. Although convection has increased some since yesterday (with a fairly strong convective burst over the last 2 hours), wind shear of nearly 20 Kts has continued to inhibit major intensification over the last 24hrs. OTH, outflow appears ...

Updated: 1:43 PM GMT on July 21, 2014

RAMMASUN MAKES WAY FOR MATMO AS TROPICAL STORM WALI GOES ‘POOF' & ATLANTIC 'STIRS'

By: Dr. Jeff Masters, 6:20 PM GMT on July 19, 2014

(By Steve Gregory - Substituting for Dr. Masters who is on Vacation.)




Just before 00Z today, Typhoon Rammasun made it’s final landfall in northern-most Vietnam as a CAT 2 (my analysis) and is QUICKLY weakening and losing its identity as it continues moving inland.

Meanwhile, Tropical Storm MATMO (10W) continues to become better organized, and is currently approaching Typhoon intensity. The cyclone has an estimated pressur...

Super Typhoon Rammasun Makes Landfall – Next Up Tropical Storm Matmo

By: Dr. Jeff Masters, 5:49 PM GMT on July 18, 2014

(By Steve Gregory - Substituting for Dr. Masters who is on Vacation.)



Figure 1: NEXSAT image showing both Rammasun and newly formed T.S. Matmo just a couple hours before Rammasun made landfall.

Super Typhoon Rammasun has made landfall on the Luichow Peninsula just north of Hainan most likely as a low end CAT 4 Typhoon. (Officially, JTWC has carried it as a borderline CAT 5). Haikou on the north coast of Hainan, about 50NM SSE of t...

Updated: 7:29 PM GMT on July 18, 2014

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About

Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.