The circulation of the low pressure system designated as Invest 91L strengthened slightly on Thursday.\u00a0 At 8:00 p.m. EDT on Thursday the center of Invest 91L was located at latitude 27.4\u00b0N and longitude 70.9\u00b0W which put it about 410 miles (660 km) east-northeast of Great Abaco Island, Bahamas and about 675 miles (1090 km) south-southeast of Charleston, South Carolina.\u00a0 Invest 91L was moving toward the west-northwest at 10 m.p.h. (16 km\/h).\u00a0 The maximum sustained wind speed was 35 m.p.h. (55 km\/h) and there were wind gusts to near 45 m.p.h. (70 km\/h).\u00a0 The minimum surface pressure was 1013 mb.\u00a0 The center of Invest 91L was near NOAA buoy 41047 which reported observations consistent with those numbers.<\/p>\n
The organization of Invest 91L improved slightly on Thursday.\u00a0 A few thunderstorms formed northeast of the center of circulation and they persisted throughout the day.\u00a0 However, there are few thunderstorms in other parts of Invest 91L.\u00a0 The circulation became slightly more circular although it is still elongated.\u00a0 The surface pressure decreased slowly, but steadily throughout the day.<\/p>\n
The environment around Invest 91L is only marginal for intensification.\u00a0 It is over water where the Sea Surface Temperature is near 26\u00b0C to 27\u00b0C.\u00a0 However, an upper level low near Cuba and an upper level ridge near the east coast of the U.S. are combining to create southerly winds over the top of Invest 91L.\u00a0 Those winds are causing moderate levels over vertical wind shear which is inhibiting the development of the system.\u00a0 The magnitude of the wind shear decreased during the past 24 hours and it could decrease a little more on Friday as the upper level ridge moves farther east.<\/p>\n
If more thunderstorms develop near the center of circulation, the system could be classified as a tropical depression or tropical storm.\u00a0 The National Hurricane Center (NHC) is indicating that there is an 80% probability that the Invest 91L will become a tropical cyclone or subtropical cyclone within 48 hours.\u00a0 NHC has tentatively tasked a reconnaissance plane to investigate the system on Friday.<\/p>\n
The vertical wind shear is limiting the strongest part of the circulation of Invest 91L to the lower half of the troposphere.\u00a0 Thus, the system is being steered toward the west-northwest by a surface pressure system over the western Atlantic Ocean.\u00a0 That general motion is expected to continue with a slow northward turn.\u00a0 On its anticipated track Invest 91L could approach the southeast coast of the U.S. in 48 to 72 hours.<\/p>\n
The primary risks with Invest 91L remain coastal erosion, rip currents and locally heavy rainfall.\u00a0 Some wind damage will be possible, but it is likely to be minimal.<\/p>\n","protected":false},"excerpt":{"rendered":"
The circulation of the low pressure system designated as Invest 91L strengthened slightly on Thursday.\u00a0 At 8:00 p.m. EDT on Thursday the center of Invest 91L was located at latitude 27.4\u00b0N and longitude 70.9\u00b0W which put it about 410 miles (660 km) east-northeast of Great Abaco Island, Bahamas and about 675 miles (1090 km) south-southeast […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,2],"tags":[375,51,98,374,100,99,311,97,213],"_links":{"self":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/posts\/2429"}],"collection":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2429"}],"version-history":[{"count":1,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/posts\/2429\/revisions"}],"predecessor-version":[{"id":2430,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=\/wp\/v2\/posts\/2429\/revisions\/2430"}],"wp:attachment":[{"href":"https:\/\/jayhobgood.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jayhobgood.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}