NHC Tropical Weather Discussion (Atlantic)

• NHC Atlantic Tropical Weather Discussion
  
  000
  AXNT20 KNHC 231723
  TWDAT
  
  Tropical Weather Discussion
  NWS National Hurricane Center Miami FL
  123 PM EDT Sat Sep 23 2017
  
  Tropical Weather Discussion for North America, Central America
  Gulf of Mexico, Caribbean Sea, northern sections of South
  America, and Atlantic Ocean to the African coast from the
  Equator to 32N. The following information is based on satellite
  imagery, weather observations, radar and meteorological analysis.
  
  Based on 1200 UTC surface analysis and satellite imagery through
  1645 UTC.
  
  ...SPECIAL FEATURES...
  Hurricane Maria is centered near 25.4N 72.3W at 23/1500 UTC or
  about 215 nm E of Eleuthera Island and about 280 nm E of Nassau
  Bahamas moving N-NW at 7 kt. Estimated minimum central pressure
  is 952 mb. Maximum sustained wind speed is 100 kt with gusts to
  125 kt. Scattered to numerous moderate convection is within 135 nm
  of center. Scattered moderate convection is elsewhere from 22N-30N
  between 69W-76W. Widely scattered moderate convection is from
  20N-29N between 63W-69W...and from 27N-31N between 76W-80W. See
  the latest NHC Forecast/Advisory under AWIPS/WMO headers
  MIATCMAT5/WTNT25 KNHC for more details.
  
  Tropical Storm Lee is centered near 31.9N 49.4W at 23/1500 UTC or
  about 780 nm E of Bermuda and about 1155 nm WSW of the Azores
  moving N at 2 kt. Estimated minimum central pressure 1007 mb.
  Maximum sustained wind speed is 40 kt with gusts to 50 kt.
  Widely scattered moderate convection is from 31N-33N between
  49W-51W. See the latest NHC Forecast/Advisory under AWIPS/WMO
  headers MIATCMAT4/WTNT24 KNHC for more details.
  
  ...TROPICAL WAVES...
  Tropical wave extends from 09N22W to 22N20W moving W at 5-10 kt.
  The wave coincides with a 700 mb low...the northern vortex...
  centered near 21N21W and associated 700 mb troughing between
  16W-28W. No significant deep convection is associated with the
  wave axis at this time. Ongoing deep convection remains S of the
  monsoon trough axis and will be mentioned below.
  
  Tropical wave extends from 05N56W to 17N55W moving W at 10-15 kt.
  The wave remains on the southwestern periphery of a 700 mb ridge
  anchored near 22N40W and lies beneath an upper level trough axis
  extending from 25N52W to a broad base deep in the tropics near
  05N55W. Widely scattered moderate convection is from 05N-12N
  between 49W-61W.
  
  ...ITCZ/MONSOON TROUGH...
  The monsoon trough axis extends from the African coast near
  14N17W to 09N23W to 06N33W. The Intertropical Convergence Zone
  axis extends from 06N33W to 05N38W to 06N46W. Scattered moderate
  convection is from 06N-13N between 14W-21W.
  
  ...DISCUSSION...
  
  GULF OF MEXICO...
  A middle to upper level low is noted on water vapor imagery
  centered over the Florida panhandle near 31N85W with a trough axis
  extending southward over the eastern Gulf to a broad base over the
  Yucatan peninsula and NW Caribbean Sea. An overall weak pressure
  pattern across the basin is resulting in gentle to moderate
  easterly winds with areas of isolated showers and tstms generally
  occurring from 23N-29N between 84W-89W under the influence of the
  middle to upper level lifting dynamics in place. W of 90W...dry
  and stable northerly flow aloft and generally gentle to moderate
  E-SE winds are providing for fair conditions and mostly clear
  skies this afternoon. Through the remainder of the weekend into
  the middle of next week...little change is expected in overall
  conditions. By Tuesday night into Wednesday...E-SE flow will
  increase slightly into moderate to occasional fresh breeze
  conditions as ridging noses in from the Arklatex region into the
  eastern Gulf Wednesday into Thursday.
  
  CARIBBEAN SEA...
  West-southwesterly flow aloft prevails W of 72W this afternoon as
  Hurricane Maria is well north of the basin and an overall weak
  pressure pattern remains in place across the central and western
  Caribbean. As a result of the weaker pressure pattern...winds
  remain generally light to gentle and variable at times. A couple
  of weak surface troughs are analyzed...one from the coast of
  eastern Cuba near 20N78W to the central coast of Honduras near 16N
  86W...the other extending south of Hispaniola near 17N71W to
  12N70W. Across the NW Caribbean...skies remain mostly clear with
  fair conditions prevailing this afternoon. To the east...the other
  surface trough is providing focus for widely scattered showers and
  tstms from 13N-18N between 69W-72W. In addition...across the SW
  Caribbean...the monsoon trough axis extends along 08N/09N with
  scattered showers and strong tstms occurring S of 12N between
  75W-83W. Finally...a tropical wave currently along 56W will
  continue approaching the Lesser Antilles through Sunday and
  increase the probability of isolated showers and tstms...otherwise
  moderate to occasional fresh SE winds will prevail E of 70W.
  
  ...HISPANIOLA...
  A surface trough currently extends from the south-central coast
  near 17N71W to 12N71W across the central Caribbean Sea and
  continues to provide focus for scattered showers and tstms across
  the southeastern portion of the island this afternoon. The
  troughing will slide westward through Sunday as weak ridging
  builds in from the central Atlc from the east.
  
  ATLANTIC OCEAN...
  Outside the influence of Maria across the SW North Atlc
  waters...surface ridging prevails across much of the remainder of
  the central and eastern Atlc. A 1021 mb high is centered E-NE from
  Bermuda near 34N56W and a 1021 mb high is centered across the
  central Atlc near 31N40W. Between these two highs...Tropical Storm
  Lee continues to influence the waters from 30N-35N between 45W-
  53W. In addition...a middle to upper level low is centered near
  27N53W generating scattered showers and tstms from 25N-32N between
  39W-45W.
  
  For additional information please visit
  http://www.hurricanes.gov/marine
  
  $$
  HUFFMAN