National Hurricane Center (Atlantic)
Issued at 500 AM AST Mon Oct 14 2019
000 WTNT44 KNHC 140831 TCDAT4 Tropical Storm Melissa Discussion Number 12 NWS National Hurricane Center Miami FL AL142019 500 AM AST Mon Oct 14 2019 Melissa is hanging on to tropical storm status. Satellite images indicate that an area of deep convection continues to pulse in the northeastern quadrant of the circulation, but the remainder of the cyclone consists of a swirl of low-level clouds. The center of Melissa is losing definition as it is becoming increasingly elongated from northeast to southwest due to the interaction with a front about 90 n mi to its northwest. An ASCAT-C pass from around 0100 UTC showed maximum winds of about 35 kt in the southeastern quadrant, and the initial intensity is held at that value. This wind speed estimate is a little higher than the Dvorak estimates. Melissa is expected to remain in hostile conditions of strong westerly wind shear and dry mid-level air, and it is headed for progressively cooler waters. These conditions should promote weakening and ultimately dissipation within a day or two. Although the official forecast doesn't show Melissa dissipating until 36 hours, most of the models show the storm opening up into a trough later today, so it could certainly dissipate sooner than forecast. The tropical storm is moving east-northeastward at 17 kt. An even faster east-northeast to east motion is expected until the cyclone dissipates as it moves within the mid-latitude westerlies. The NHC track forecast lies near the middle of the tightly-packed guidance envelope. FORECAST POSITIONS AND MAX WINDS INIT 14/0900Z 40.7N 54.0W 35 KT 40 MPH 12H 14/1800Z 41.2N 50.0W 30 KT 35 MPH...POST-TROP/REMNT LOW 24H 15/0600Z 41.5N 43.7W 30 KT 35 MPH...POST-TROP/REMNT LOW 36H 15/1800Z...DISSIPATED $$ Forecaster Cangialosi
Issued at 0900 UTC MON OCT 14 2019
000 FONT14 KNHC 140831 PWSAT4 TROPICAL STORM MELISSA WIND SPEED PROBABILITIES NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142019 0900 UTC MON OCT 14 2019 AT 0900Z THE CENTER OF TROPICAL STORM MELISSA WAS LOCATED NEAR LATITUDE 40.7 NORTH...LONGITUDE 54.0 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 06Z MON AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 06Z MON 18Z MON 06Z TUE 18Z TUE 06Z WED 06Z THU 06Z FRI PERIODS TO TO TO TO TO TO TO 18Z MON 06Z TUE 18Z TUE 06Z WED 06Z THU 06Z FRI 06Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER CANGIALOSI
...MELISSA STILL A TROPICAL STORM BUT EXPECTED TO DISSIPATE WITHIN A DAY OR SO... As of 5:00 AM AST Mon Oct 14 the center of Melissa was located near 40.7, -54.0 with movement ENE at 20 mph. The minimum central pressure was 1004 mb with maximum sustained winds of about 40 mph.
Issued at 500 AM AST Mon Oct 14 2019
000 WTNT34 KNHC 140830 TCPAT4 BULLETIN Tropical Storm Melissa Advisory Number 12 NWS National Hurricane Center Miami FL AL142019 500 AM AST Mon Oct 14 2019 ...MELISSA STILL A TROPICAL STORM BUT EXPECTED TO DISSIPATE WITHIN A DAY OR SO... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...40.7N 54.0W ABOUT 415 MI...670 KM S OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...ENE OR 75 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Tropical Storm Melissa was located near latitude 40.7 North, longitude 54.0 West. Melissa is moving toward the east-northeast near 20 mph (31 km/h). A faster east-northeast or east motion is expected later today and Tuesday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Weakening is expected, and Melissa is forecast to become a post-tropical remnant low later today and dissipate in a day or so. Tropical-storm-force winds extend outward up to 105 miles (165 km) from the center. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- SURF: Swells generated by Melissa are gradually subsiding along much of the U.S. east coast, portions of the Bahamas, Bermuda, and Atlantic Canada. Please consult products from your local weather office for more information. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi
Issued at 0900 UTC MON OCT 14 2019
000 WTNT24 KNHC 140830 TCMAT4 TROPICAL STORM MELISSA FORECAST/ADVISORY NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142019 0900 UTC MON OCT 14 2019 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 40.7N 54.0W AT 14/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE EAST-NORTHEAST OR 75 DEGREES AT 17 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1004 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 0NE 90SE 0SW 0NW. 12 FT SEAS.. 60NE 120SE 120SW 60NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 40.7N 54.0W AT 14/0900Z AT 14/0600Z CENTER WAS LOCATED NEAR 40.5N 55.3W FORECAST VALID 14/1800Z 41.2N 50.0W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 15/0600Z 41.5N 43.7W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 15/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 40.7N 54.0W NEXT ADVISORY AT 14/1500Z $$ FORECASTER CANGIALOSI
ABNT20 KNHC 140544
Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 AM EDT Mon Oct 14 2019
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
The National Hurricane Center is issuing advisories on Tropical
Storm Melissa, located several hundred miles south of Newfoundland,
A broad area of low pressure is located over the far eastern
tropical Atlantic Ocean just west of the west coast of Africa with
disorganized shower and thunderstorm activity. Environmental
conditions are expected to be conducive for development, and a
tropical depression is likely to form during the next day or so
while the disturbance moves west-northwestward to northwestward near
or northeast of the Cabo Verde Islands. Strong upper-level winds
should prevent any further development by midweek. This system is
forecast to bring locally heavy rainfall and gusty winds to portions
of the Cabo Verde Islands later today through Tuesday, and interests
there should monitor the progress of this system.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...70 percent.
Disorganized showers and thunderstorms over the southwestern
Caribbean Sea and parts of Central America are associated with
a broad area of low pressure over eastern Honduras. This system is
forecast to continue moving west-northwestward across northern
Honduras, southern Belize, and northern Guatemala, which should
prevent tropical cyclone formation for the next couple of days. By
Wednesday, however, the low is forecast to emerge over the
southern Bay of Campeche where conditions could become a little more
conducive for some organization to occur. Regardless of
development, this system is expected to produce heavy rains over
portions of Central America during the next few days, which could
cause flooding and mudslides, especially in mountainous areas.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.
A tropical wave located over the central tropical Atlantic is
producing disorganized cloudiness and thunderstorms. While
thunderstorm activity has increased since yesterday, upper-level
winds are not particularly conducive for significant development of
this system over the next couple of days while it moves westward at
around 15 mph. By Wednesday, as the wave approaches the Windward
Islands, upper-level winds are forecast to become quite hostile for
any further development.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 5 days...low...10 percent.