7:30PM EDT Update 19 Aug 2017

Recon is presently investigating "Harvey" to determine if the area of low pressure is still closed in some way. Assuming that recon is able to close off a low level circulation, the Low could take advantage of some potentially favorable conditions ahead - perhaps as soon as overnight tonight, and so the official NHC forecast does call for restrengthening. Alternatively, if a coherent LLC is not found, "Harvey" would be an open wave, and not a tropical cyclone.


Image above: NHC Marine Graphicast Issued Sat 19 Aug 2017 22:51 UTC

12:30PM EDT Update 19 Aug 2017
As quickly as the Cabo Verde Season announced its arrival, so too did one of 2017's main themes of anomalously low instability, and in the face of a couple stout upper-level lows and some nearby dry air, it appears that, at least for the time being, Harvey and Invest 92L may be falling apart. We could even see at 5:00 this afternoon that NHC no longer finds enough organization to continue issuing advisories on Harvey altogether, but both features (Harvey, or his remnants, and Invest 92L) would still need to be watched, as conditions for development could improve next week.

8:30PM EDT Update 17 Aug 2017
Cabo Verde Season has Arrived


10:30AM EDT Update 17 Aug 2017
Full Advisories will begin shortly on PTC NINE (91L). Caribbean impacts likely. Recon may find that it is already Harvey later today.

THE GOVERNMENT OF FRANCE HAS ISSUED A TROPICAL STORM WARNING FOR MARTINIQUE.

THE GOVERNMENT OF BARBADOS HAS ISSUED A TROPICAL STORM WARNING FOR BARBADOS...ST. VINCENT...AND THE GRENADINES.

THE GOVERNMENT OF ST. LUCIA HAS ISSUED A TROPICAL STORM WARNING FOR ST. LUCIA.

THE GOVERNMENT OF BARBADOS HAS ISSUED A TROPICAL STORM WATCH FOR DOMINICA.

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN 24-36 HOURS.

10AM EDT Update 17 Aug 2017
Three coherent disturbances continue tracking generally west today (91L, 92L, 93L?), and advisories may begin soon on what is now "91L" - the westernmost of the bunch. Recon has been tasked to head out to 91L at 1800Z to help determine if a tropical cyclone has formed and to assess its intensity.

At least two of the above thee disturbances have the potential to affect land within 72 hours (91L and 92L). The next name on the Atlantic list is Harvey.

Original Entry
Disturbances Entering a Favorable Basin



The Atlantic is phasing into a much more conducive state for tropical cyclogenesis and intensification. This is neither hype, nor speculation, and the regions probably most favorable for formation and/or intensification will include the Main Development Region (a rectangular 'box' that encompass the Tropical Atlantic and some of the Caribbean), as well as also off the southeast coast, and possibly even the Gulf. Pick your poison.

As of this new article, there is one named storm in the Atlantic, Gert, which is forecast to come just shy of hurricane intensity and head out to sea regardless, one active Invest (91L), and one convectively active portion of the Monsoon Trof that is not yet Invest tagged, but which could be, if 91L doesn't absorb it. Beyond that, there is also a bit of a wave train pattern over Africa that is ripe for discussion in the General 2017 Model Watching Lounge .


TD8 (GERT) Event Related Links

Animated Skeetobite Model Plot of GERT

SFWMD Model Plot (Animated Model Plot) SFWMD Hurricane Page
Clark Evans Track Model Plot of GERT (Animated!) Model Plots in Google Earth - In Google Maps
Clark Evans Intensity Model Plot of GERT (Animated!)

Clark Evans Track Plot of GERT

Other Model Charts from Clark

Clark Evans Top 10 Analog Storms for GERT
More model runs on from RAL/Jonathan Vigh's page
NRL Info on GERT -- RAMMB Info

Floater Satellite Images: Visible (Loop), IR (Loop), WV (Loop), Dvorak (Loop), AVN (Loop), RGB (Loop), Rainbow (Loop), Funktop (Loop), RB Top Loop)


Harvey Event Related Links

Animated Skeetobite Model Plot of Harvey

SFWMD Model Plot (Animated Model Plot) SFWMD Hurricane Page
Clark Evans Track Model Plot of Harvey (Animated!) Model Plots in Google Earth - In Google Maps
Clark Evans Intensity Model Plot of Harvey (Animated!)

Clark Evans Track Plot of Harvey

Other Model Charts from Clark

Clark Evans Top 10 Analog Storms for Harvey
More model runs on from RAL/Jonathan Vigh's page
NRL Info on Harvey -- RAMMB Info

Floater Satellite Images: Visible (Loop), IR (Loop), WV (Loop), Dvorak (Loop), AVN (Loop), RGB (Loop), Rainbow (Loop), Funktop (Loop), RB Top Loop)


92L (Central Atlantic Tropical Low) Event Related Links

Animated Skeetobite Model Plot of 92L

SFWMD Model Plot (Animated Model Plot) SFWMD Hurricane Page
Clark Evans Track Model Plot of 92L (Animated!) Model Plots in Google Earth - In Google Maps
Clark Evans Intensity Model Plot of 92L (Animated!)

Clark Evans Track Plot of 92L

Other Model Charts from Clark

Clark Evans Top 10 Analog Storms for 92L
More model runs on from RAL/Jonathan Vigh's page
NRL Info on 92L -- RAMMB Info

Floater Satellite Images: Visible (Loop), IR (Loop), WV (Loop), Dvorak (Loop), AVN (Loop), RGB (Loop), Rainbow (Loop), Funktop (Loop), RB Top Loop)


StormCarib Reports from the Caribbean Islands

Caribbean Weather Observations

Barbados Brohav Weather Fax

Caribbean Broadcast Corporation (TV/Radio from Antilles)

San Juan, PR Radar Long Range Radar Loop (Latest Static) Base (Static) 1 HR Rainfall (Static) Storm Total Rainfall (Static)

Various Caribbean Radio Stations

DR1 Dominican Republic Hurricanes