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BOOKMARK the Haiti Action.net Tropical Cyclone Page for latest updates during this hurricane season. HaitiAction.net will host this page with many Tropical Cyclone resources so you can find the latest information when you are searching for current updates.

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BOOKMARK the Haiti Action.net Tropical Cyclone Page for latest updates during this hurricane season.

Bookmark this page for the 2012 Hurricane Season

2012 storm names: Alberto, Beryl, Chris, Debby, Ernesto, Florence, Gordon, Helene, Isaac, Joyce, Kirk, Leslie, Michael, Nadine, Oscar, Patty, Rafael, Sandy, Tony, Valerie, William


000
WTNT43 KNHC 250902
TCDAT3

HURRICANE SANDY DISCUSSION NUMBER 12
NWS NATIONAL HURRICANE CENTER MIAMI FL AL182012
500 AM EDT THU OCT 25 2012

EARLIER THIS MORNING...SANDY MADE LANDFALL JUST WEST OF SANTIAGO DE
CUBA AS A STRONG CATEGORY TWO HURRICANE. CUBAN RADAR DATA AND
REPORTS FROM AN AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT INDICATED
THAT SANDY HAD A WELL-DEFINED 20-24 N MI DIAMETER EYE WHEN IT MADE
LANDFALL. THE AIRCRAFT REPORTED MAXIMUM 700-MB FLIGHT-LEVEL WINDS
OF 117 KT AND BIAS-CORRECTED SFMR SURFACE ESTIMATES OF 91-92 KT. A
BLEND OF THESE DATA YIELDS A SURFACE WIND ESTIMATE OF 99 KT...JUST
BELOW MAJOR HURRICANE STATUS. THE MAIN REASON WHY SANDY WAS HELD
JUST BELOW MAJOR HURRICANE STATUS WAS DUE TO THE SUSTAINED 68-KT
WIND AND GUST TO 99 KT THAT OCCURRED AROUND 0517Z. HOWEVER...
STRONGER WINDS MAY HAVE OCCURRED LATER WHEN THE SOUTHEASTERN
PORTION OF THE EYEWALL MOVED ONSHORE...WHICH IS THE QUADRANT WHERE
THE 117-KT FLIGHT-LEVEL WIND WAS OBSERVED. THE INITIAL INTENSITY OF
90 KT IS BASED ON WIND DECAY MODELS FOR HURRICANES OVER LAND.

THE INITIAL MOTION IS 005/16 KT. AFTER A SLIGHT JOG TO THE
NORTH-NORTHEAST VERY EARLY THIS MORNING...SANDY APPEARS TO HAVE
RESUMED A NORTHWARD MOTION...AND THIS GENERAL MOTION IS EXPECTED TO
CONTINUE FOR THE NEXT 24 HOURS OR SO. AFTER THAT...A DEEP-LAYER
TROUGH OVER THE NORTHERN U.S. AND A SIMILAR DEEP-LAYER TROUGH OVER
THE NORTH ATLANTIC EAST OF NEWFOUNDLAND ARE FORECAST TO AMPLIFY...
WHICH WILL INDUCE MID-LEVEL RIDGING NEAR THE NORTHEAST U.S. COAST
BETWEEN THOSE TWO SYSTEMS. THAT RIDGE IS EXPECTED TO CAUSE SANDY TO
SLOW DOWN AND TURN TOWARD THE NORTH-NORTHWEST IN 24-36 HOURS. AFTER
THAT...THE RIDGE TO THE NORTH OF SANDY IS FORECAST TO WEAKEN AS AN
APPROACHING DEEP MID-LATITUDE TROUGH MOVES OVER THE EASTERN HALF OF
THE UNITED STATES BY 72 HOURS AND BEGINS TO ACCELERATE SANDY TO THE
NORTHEAST. THE NHC MODEL GUIDANCE IS IN EXCELLENT AGREEMENT ON THIS
DEVELOPING SCENARIO. AFTER THAT...HOWEVER...THE GUIDANCE DIVERGES
SIGNIFICANTLY WITH THE ECMWF...GFDL...AND NOGAPS TAKING SANDY
NORTHWESTWARD AND INLAND OVER THE DELMARVA PENINSULA BY 120
HOURS...WHEREAS THE GFS MODEL KEEPS SANDY MOVING NORTHEASTWARD AWAY
FROM THE U.S. AND OVER THE OPEN NORTH ATLANTIC. THE REMAINDER OF
THE MODEL GUIDANCE IS SOMEWHERE IN BETWEEN THESE TWO EXTREMES.
GIVEN THE HISTORICAL RELIABILITY OF THE VERY CONSISTENT ECMWF MODEL
OVER THE PAST 2 DAYS...THE OFFICIAL FORECAST WAS TURNED SLIGHTLY
MORE TOWARD THE NORTHWEST AT 120 HOURS...AND IS CLOSE TO A BLEND OF
THE CONSENSUS MODELS TV15 AND TVCN...AND THE FSU TRACK MODEL.

OWING TO THE HIGHER CURRENT INTENSITY OF SANDY...THE NEW INTENSITY
FORECAST IS ALSO HIGHER THAN THE PREVIOUS FORECAST THROUGH 36
HOURS...AND THEN IS SIMILAR TO THE PREVIOUS ADVISORY INTENSITY
FORECAST AS INCREASING SHEAR BEGINS TO AFFECT THE CYCLONE. THE MAIN
FORECAST CHALLENGE IS DETERMINING JUST HOW MUCH BAROCLINIC
INFLUENCE THE DEEP TROUGH OVER THE EASTERN U.S. WILL HAVE ON
SANDY...AND ALSO WHAT THE VERTICAL STRUCTURE OF SANDY WILL BE AFTER
48 HOURS. ALL OF THE GLOBAL MODELS MAINTAIN SIGNIFICANT RAINFALL
AMOUNTS IN EXCESS OF 2 INCHES NEAR THE CENTER THROUGH 120 HOURS...
WHICH SUGGESTS THAT SANDY WILL MAINTAIN SOME CONVECTION AND
POSSIBLY AN INNER-CORE WARM STRUCTURE THAT WOULD KEEP SOME TROPICAL
CHARACTERISTICS ASSOCIATED WITH THE SYSTEM. THE NEW INTENSITY
FORECAST IS SIMILAR TO THE LGEM AND DECAY-SHIPS INTENSITY MODELS.
THE FORECAST WILL STILL CALL FOR SANDY TO BECOME POST-TROPICAL BY
120 HOURS...ALTHOUGH THIS REMAINS LOW CONFIDENCE.

FORECAST POSITIONS AND MAX WINDS

INIT 25/0900Z 20.9N 75.8W 90 KT 105 MPH
12H 25/1800Z 23.1N 75.7W 85 KT 100 MPH
24H 26/0600Z 25.4N 76.1W 80 KT 90 MPH
36H 26/1800Z 26.8N 76.6W 75 KT 85 MPH
48H 27/0600Z 28.1N 76.3W 70 KT 80 MPH
72H 28/0600Z 31.2N 73.7W 65 KT 75 MPH
96H 29/0600Z 34.5N 70.5W 65 KT 75 MPH
120H 30/0600Z 37.5N 70.5W 60 KT 70 MPH...POST-TROPICAL

$$
FORECASTER STEWART

From the 2008 archive click image for original Aug 30, 2008 article

Will Hurricane Hanna threaten Haiti? click image for original Aug 30, 2008 article

Previous reports

Hurricane Bill will threaten Haiti this week Aug 17

Hurricane Ana could threaten Haiti next week
(but Hurricane Bill arrived months ago)
 Aug 11

Haiti waits in fear for Hurricane Ike Sep 4

Haiti’s deadly hurricane season just getting started Sep 1

Will Hurricane Hanna threaten Haiti? Aug 30

Dangerous Hurricane Gustav will hit Haiti Aug 25

Haiti's crops will be devastated by Hurricane Gustav Aug 26

Furious Fay floods Florida as a new storm approaches Haiti Aug 21

Furious Tropical Storm Fay drenches Haiti Aug 15

 

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HaitiAction.net Links Latest Info on Tropical Cyclones for Caribbean
  1. République d'Haiti [French, not Kreyol]
    Communiqué d'activité cyclonique
  2. Haiti-Puerto Rico Visible Satellite Loop
  3. NRL Tropical Cyclone Page
    Monterey Marine Meteorology Division
  4. National Hurricane Center
  5. Barahona Current Weather
  6. Atlantic Total Precipitable Water
    takes a couple minutes to download on DSL
  7. Instituto de Meteorologia - Cuba
  8. Links Meteorólogicos Venezuela
  9. AccuWeather.com - Latest
    Atlantic Satellite Overview
  10. National Weather Service
    Southern USA Region HQ
  11. NRL Tropical Support Page
    NMOC - Norfolk, VA
  12. National Weather Service Forecast Office
    San Juan, Puerto Rico
  13. Granma International - Cuba
  14. Jamaica Observer
  15. Tropical Cyclones
    Cooperative Institute for Meteorological Satellite Studies.
  16. Latest QUICKSCAT Wind vectors
  17. Latest QUICKSCAT Wind speed
  18. NDBC & WMO Buoys
    Station 41041 - Middle Atlantic
    Station 41040 - West Atlantic
    Station 41NT0 - NW Tropical Atlantic
    Station 41101 - East of Martinique

    Station 41043 - South Western Atlantic
    Station 41044 - South Atlantic

    Station JOXP4 - Puerto Rico - South

    Station 42059 - Eastern Caribbean
    Station 42058 - Central Caribbean
    Station 42057 - Western Caribbean
    Station 42056 - Yucatan Basin
    Station 42055 - Bay of Campeche
  19. PAP - Weather UnderGround
  20. Meteo France
    Phénomènes cycloniques de l'Atlantique Nord
  21. Jamaica Meterological Service
  22. NASA GOES East Visible - Hurricane Sector
  23. Bahamas
  24. Dominica
    Severe Weather Advisory
  25. República Dominica
  26. Antigua & Barbuda
  27. CDEMA - Saint Lucia
  28. World Meteorological Organization
1 knots = 1.15077945 mph

The Saffir-Simpson Hurricane Scale
What "Category 1-2-3-4-5" means

Key to offical Tracking Chart symbols
click above link to get original Powerpoint file

St. Jean Bosco
march
here