We have Arthur:
TROPICAL STORM ARTHUR FORECAST/ADVISORY NUMBER 3
NWS NATIONAL HURRICANE CENTER MIAMI FL AL012014
1500 UTC TUE JUL 01 2014
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
NONE.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* EAST COAST OF FLORIDA FROM FORT PIERCE TO FLAGLER BEACH
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN 24 TO 36 HOURS.
INTERESTS ELSEWHERE ALONG THE SOUTHEAST COAST OF THE UNITED STATES
SHOULD MONITOR THE PROGRESS OF THIS SYSTEM.
TROPICAL STORM CENTER LOCATED NEAR 27.6N 79.3W AT 01/1500Z
POSITION ACCURATE WITHIN 20 NM
PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT 2 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1007 MB
MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT.
34 KT....... 0NE 40SE 40SW 0NW.
12 FT SEAS.. 0NE 40SE 40SW 0NW.
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 27.6N 79.3W AT 01/1500Z
AT 01/1200Z CENTER WAS LOCATED NEAR 27.5N 79.2W
FORECAST VALID 02/0000Z 27.8N 79.4W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 30NE 30SE 30SW 30NW.
FORECAST VALID 02/1200Z 28.7N 79.6W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 30NE 30SE 30SW 30NW.
FORECAST VALID 03/0000Z 29.8N 79.5W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 20SE 0SW 0NW.
34 KT... 50NE 50SE 40SW 50NW.
FORECAST VALID 03/1200Z 31.2N 78.9W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 30NE 30SE 0SW 20NW.
34 KT... 70NE 70SE 50SW 60NW.
FORECAST VALID 04/1200Z 35.4N 75.2W
MAX WIND 70 KT...GUSTS 85 KT.
50 KT... 40NE 40SE 20SW 30NW.
34 KT... 90NE 90SE 60SW 70NW.
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY
OUTLOOK VALID 05/1200Z 40.8N 67.3W
MAX WIND 65 KT...GUSTS 80 KT.
OUTLOOK VALID 06/1200Z 45.5N 59.5W...POST-TROP/EXTRATROP
MAX WIND 45 KT...GUSTS 55 KT.
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 27.6N 79.3W
NEXT ADVISORY AT 01/2100Z
$$
FORECASTER STEWART
11AM Discussion:
000
WTNT41 KNHC 011502
TCDAT1
TROPICAL STORM ARTHUR DISCUSSION NUMBER 3
NWS NATIONAL HURRICANE CENTER MIAMI FL AL012014
1100 AM EDT TUE JUL 01 2014
Radar and satellite imagery indicate that the convective
organization of the cyclone has improved since the previous
advisory, and the cyclone is being upgraded based on a sustained
wind report of 33 kt from Settlement Point (SPGF1) on Grand Bahama
Island earlier this morning that was outside of the deep convection.
After remaining nearly stationary earlier this morning, Arthur
appears to to be drifting northwestward now with an uncertain motion
of 315/02 kt. Otherwise, there is no significant change to the
previous forecast track. The latest model guidance has continued the
trend of a pronounced mid-tropospheric trough digging southeastward
from the upper-midwest into the northeastern and mid-Atlantic region
of the United States by 72 hours. The 500 mb flow pattern is almost
identical in the GFS and ECMWF models, which increases the
confidence in this evolving pattern. As a result, a steady increase
in southwesterly steering flow over the southeastern United States
is expected to gradually turn the tropical cyclone northward over
the next 24-36 hours, and then accelerate the system faster toward
the northeast on Thursday and Friday. By Days 4 and 5, Arthur is
forecast to move over the far north Atlantic as an extratropical
cyclone. The NHC track forecast is just an update of the previous
advisory track, and lies down the middle of the tightly packed
guidance envelope close to the consensus model TVCA.
Northwesterly vertical wind shear is forecast by the models to
gradually subside over the next 48 hours, which should allow the
cyclone to develop its own upper-level outflow pattern. In fact,
latest visible and water vapor imagery indicates that cirrus
outflow has been expanding on the north side of the system during
the past few hours, suggesting that the shear conditions could
already be subsiding. The low shear conditions and warm
sea-surface temperatures should allow for at least steady
strengthening, and the cyclone is expected to become a hurricane by
72 hours. The official intensity forecast is similar to the
latest intensity model consensus IVCN through 36 hours, and then
slightly higher after that.
FORECAST POSITIONS AND MAX WINDS
INIT 01/1500Z 27.6N 79.3W 35 KT 40 MPH
12H 02/0000Z 27.8N 79.4W 35 KT 40 MPH
24H 02/1200Z 28.7N 79.6W 40 KT 45 MPH
36H 03/0000Z 29.8N 79.5W 50 KT 60 MPH
48H 03/1200Z 31.2N 78.9W 60 KT 70 MPH
72H 04/1200Z 35.4N 75.2W 70 KT 80 MPH
96H 05/1200Z 40.8N 67.3W 65 KT 75 MPH
120H 06/1200Z 45.5N 59.5W 45 KT 50 MPH...POST-TROP/EXTRATROP
$$
Forecaster Stewart