Tropical Depression 18 forms south of Jamaica

By: Dr. Jeff Masters , 3:34 PM GMT on October 22, 2012

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Tropical Depression Eighteen is here, and appears poised to become Tropical Storm Sandy by early Tuesday morning. TD 18 is over very warm waters of 29.5°C, is in a moist environment, and has light wind shear of 5 - 10 knots. These conditions are very favorable for intensification, and TD 18's heavy thunderstorms are steadily organizing into curved spiral bands, as seen on visible satellite loops. An Air Force hurricane hunter aircraft will investigate TD 18 this afternoon.


Figure 1. Morning satellite image of Tropical Depression Eighteen.

Forecast for TD 18
Wind shear is forecast to be in the low to moderate range, 5 - 20 knots, through Tuesday night. This should allow for some steady development of TD 18. On Tuesday, a trough of low pressure to the north is expected to pull TD 18 to the north-northeast, which should put the storm in the vicinity of Jamaica on Wednesday and Eastern Cuba on Thursday. The 11 am EDT NHC Wind Probability Forecast gives a 32% chance that TD 18 will be a hurricane by 8 am EDT Wednesday, when the center should be close to Jamaica. Wind shear will rise to a high 25 - 30 knots by Thursday, which should make it difficult for TD 18 to intensify. By Friday, TD 18 should be in the Central or Eastern Bahamas, and wind shear may increase further, making TD 18 more of a hybrid subtropical storm. It is unclear at this point whether or not the trough pulling TD 18 to the north will be strong enough to pull the storm all the way out to sea to the northeast; a very complicated steering environment will develop late this week, and it is possible that a narrow ridge of high pressure could build in over TD 18 and force the storm to the west-northwest, with a potential threat to the Northwestern Bahamas and U.S. East Coast by Saturday, as predicted by the ECMWF model. TD 18 will be capable of bringing heavy rains of 5 - 10 inches, with isolated amounts of up to 15 inches in mountainous areas, to Jamaica and Haiti, Monday night through Thursday. Heavy rains will begin on Tuesday in Eastern Cuba, and spread northwards into the Central and Eastern Bahamas by Wednesday. Heavy rains of 3 - 6 inches can be expected in the Cayman Islands and Dominican Republic, Tuesday through Thursday.

Invest 90L in the middle Atlantic
A small low pressure system (Invest 90L) about 700 miles east-northeast of the northernmost Lesser Antilles Islands is headed northward at about 10 mph. The disturbance has a modest area of heavy thunderstorms, as seen on visible satellite images, and is struggling with cool, dry air from the upper-level low pressure system that it is trying to form underneath. This upper-level low has provided 90L the spin it needs to become a tropical cyclone, though. Wind shear is a moderate 10 - 20 knots, and is forecast to remain in the moderate range until Wednesday morning. This may allow 90L to develop into a tropical cyclone before it encounters high wind shear of 20 - 30 knots on Wednesday. It's unlikely that 90L will affect any land areas. In their 8 am EDT tropical weather outlook, NHC gave 90L a 50% chance of developing into a tropical cyclone by Wednesday morning.

Jeff Masters

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18Z NAM(NON TROPICAL MODEL) hr 048 TILL 84


Member Since: July 15, 2006 Posts: 173 Comments: 54283
The wind is kicking today here in West Palm Beach...Looks like we will be keeping the 20mph winds for the whole week.
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Quoting trHUrrIXC5MMX:
would TWC use a winter storm name for 99L besides its tropical name?


Does the rooster crow in the morning?
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18L is a storm and its name is sandy
Member Since: July 15, 2006 Posts: 173 Comments: 54283
Quoting Sfloridacat5:


GFS (most reliable model lately) has TD 18 way offshore. High waves/beach erosion would be the only impacts on the East coast.
Sfl..........I agree with you... Looks like a few here just want something to talk about(whether right or wrong)
Member Since: October 3, 2008 Posts: 0 Comments: 5887
000
WTNT34 KNHC 222033
TCPAT4

BULLETIN
TROPICAL DEPRESSION NINETEEN ADVISORY NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL192012
500 PM AST MON OCT 22 2012

...SECOND TROPICAL DEPRESSION OF THE DAY FORMS OVER THE CENTRAL
ATLANTIC...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...22.3N 51.7W
ABOUT 750 MI...1205 KM ENE OF THE LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...N OR 350 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES


WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 500 PM AST...2100 UTC...THE CENTER OF TROPICAL DEPRESSION
NINETEEN WAS LOCATED NEAR LATITUDE 22.3 NORTH...LONGITUDE 51.7 WEST.
THE DEPRESSION IS MOVING TOWARD THE NORTH NEAR 7 MPH...11 KM/H...
AND AN INCREASE IN FORWARD SPEED IS EXPECTED TONIGHT. A TURN
TOWARD THE NORTH-NORTHEAST IS FORECAST ON TUESDAY...FOLLOWED BY A
NORTHEASTWARD TURN TUESDAY NIGHT.
Member Since: Posts: Comments:
We have TD19 and it is expected to become a TS.
...SECOND TROPICAL DEPRESSION OF THE DAY FORMS OVER THE CENTRAL ATLANTIC...
5:00 PM AST Mon Oct 22
Location: 22.3°N 51.7°W
Moving: N at 7 mph
Min pressure: 1006 mb
Max sustained: 35 mph
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We get two depression by the price of one.cool.
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IMO, 50mph Tropical Storm Sandy with a pressure of 1001mb seems the best guess for me.
Member Since: July 8, 2005 Posts: 259 Comments: 24161
TROPICAL DEPRESSION NINETEEN DISCUSSION NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL192012
500 PM AST MON OCT 22 2012

DEEP CONVECTION ASSOCIATED WITH THE LOW PRESSURE SYSTEM OVER THE
CENTRAL ATLANTIC HAS BECOME A BIT MORE ORGANIZED DURING THE
DAY...AND BOTH TAFB AND SAB PROVIDED 1800 UTC DVORAK ESTIMATES OF
T2.0. ADVISORIES ARE THEREFORE BEING INITIATED ON TROPICAL
DEPRESSION NINETEEN WITH 30-KT WINDS. THE DEPRESSION IS FORECAST
TO BE IN AN ENVIRONMENT OF LIGHT UPPER-LEVEL WINDS FOR THE NEXT DAY
OR TWO...SO SOME STRENGTHENING APPEARS LIKELY. AFTER 48 HOURS...
THE VERTICAL SHEAR IS EXPECTED TO INCREASE TO AT LEAST 30 KT...AND
THE CYCLONE WILL BE MOVING OVER SUB-26C WATERS. IN ADDITION...THE
GLOBAL MODELS ARE INDICATING THAT THE SYSTEM IS LIKELY TO BECOME A
FRONTAL LOW...AND A WEAK ONE AT THAT...BY 72 HOURS. THEREFORE...
THE NHC INTENSITY FORECAST SHOWS A PEAK IN INTENSITY OCCURRING IN
48 HOURS WITH STEADY WEAKENING THEREAFTER. INTERESTINGLY...THE
SHIPS MODEL BRINGS THE SYSTEM TO NEAR HURRICANE STRENGTH ON DAYS 3
THROUGH 5 EVEN IN THE FACE OF MORE HOSTILE CONDITIONS. GIVEN THAT
THE GLOBAL MODELS DO NOT SUGGEST THAT EXTRATROPICAL LOW WILL FEED
OFF OF BAROCLINIC ENERGY...THE NHC FORECAST LEANS LOWER THAN MOST
OF THE HURRICANE MODELS. DISSIPATION IS ANTICIPATED BY DAY 5 WHEN
THE SYSTEM IS FORECAST TO BECOME ABSORBED BY A COMPLEX AREA OF LOW
PRESSURE WEST OF THE AZORES.

THE DEPRESSION IS BEING STEERED NORTHWARD ON THE EASTERN SIDE OF A
MID- TO UPPER-LEVEL CUTOFF LOW...AND THE INITIAL MOTION ESTIMATE IS
350/6 KT. THE CUTOFF LOW IS EXPECTED TO WEAKEN DURING THE NEXT
COUPLE OF DAYS...AND THE TROPICAL CYCLONE SHOULD THEN BE PICKED UP
BY FASTER MID-LATITUDE WESTERLIES. THERE IS NOT MUCH SPREAD IN THE
TRACK GUIDANCE...AND THE OFFICIAL TRACK FORECAST IS CLOSEST TO THE
GFS MODEL AND THE MODEL CONSENSUS TVCA.

FORECAST POSITIONS AND MAX WINDS

INIT 22/2100Z 22.3N 51.7W 30 KT 35 MPH
12H 23/0600Z 23.7N 51.8W 35 KT 40 MPH
24H 23/1800Z 25.4N 51.2W 40 KT 45 MPH
36H 24/0600Z 26.7N 49.6W 45 KT 50 MPH
48H 24/1800Z 27.7N 47.1W 50 KT 60 MPH
72H 25/1800Z 30.0N 40.5W 45 KT 50 MPH...POST-TROP/EXTRATROP
96H 26/1800Z 33.5N 34.0W 40 KT 45 MPH...POST-TROP/EXTRATROP
120H 27/1800Z...DISSIPATED

$$
FORECASTER BERG
Member Since: Posts: Comments:
Quoting Hurricanes305:


Is this the 18z
''

18z GFS isn't out yet.
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TD19 on the NHC site, predicted to peak at 60mph.
Member Since: July 8, 2005 Posts: 259 Comments: 24161

000
WTNT44 KNHC 222033
TCDAT4

TROPICAL DEPRESSION NINETEEN DISCUSSION NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL192012
500 PM AST MON OCT 22 2012

DEEP CONVECTION ASSOCIATED WITH THE LOW PRESSURE SYSTEM OVER THE
CENTRAL ATLANTIC HAS BECOME A BIT MORE ORGANIZED DURING THE
DAY...AND BOTH TAFB AND SAB PROVIDED 1800 UTC DVORAK ESTIMATES OF
T2.0. ADVISORIES ARE THEREFORE BEING INITIATED ON TROPICAL
DEPRESSION NINETEEN WITH 30-KT WINDS. THE DEPRESSION IS FORECAST
TO BE IN AN ENVIRONMENT OF LIGHT UPPER-LEVEL WINDS FOR THE NEXT DAY
OR TWO...SO SOME STRENGTHENING APPEARS LIKELY. AFTER 48 HOURS...
THE VERTICAL SHEAR IS EXPECTED TO INCREASE TO AT LEAST 30 KT...AND
THE CYCLONE WILL BE MOVING OVER SUB-26C WATERS. IN ADDITION...THE
GLOBAL MODELS ARE INDICATING THAT THE SYSTEM IS LIKELY TO BECOME A
FRONTAL LOW...AND A WEAK ONE AT THAT...BY 72 HOURS. THEREFORE...
THE NHC INTENSITY FORECAST SHOWS A PEAK IN INTENSITY OCCURRING IN
48 HOURS WITH STEADY WEAKENING THEREAFTER. INTERESTINGLY...THE
SHIPS MODEL BRINGS THE SYSTEM TO NEAR HURRICANE STRENGTH ON DAYS 3
THROUGH 5 EVEN IN THE FACE OF MORE HOSTILE CONDITIONS. GIVEN THAT
THE GLOBAL MODELS DO NOT SUGGEST THAT EXTRATROPICAL LOW WILL FEED
OFF OF BAROCLINIC ENERGY...THE NHC FORECAST LEANS LOWER THAN MOST
OF THE HURRICANE MODELS. DISSIPATION IS ANTICIPATED BY DAY 5 WHEN
THE SYSTEM IS FORECAST TO BECOME ABSORBED BY A COMPLEX AREA OF LOW
PRESSURE WEST OF THE AZORES.

THE DEPRESSION IS BEING STEERED NORTHWARD ON THE EASTERN SIDE OF A
MID- TO UPPER-LEVEL CUTOFF LOW...AND THE INITIAL MOTION ESTIMATE IS
350/6 KT. THE CUTOFF LOW IS EXPECTED TO WEAKEN DURING THE NEXT
COUPLE OF DAYS...AND THE TROPICAL CYCLONE SHOULD THEN BE PICKED UP
BY FASTER MID-LATITUDE WESTERLIES. THERE IS NOT MUCH SPREAD IN THE
TRACK GUIDANCE...AND THE OFFICIAL TRACK FORECAST IS CLOSEST TO THE
GFS MODEL AND THE MODEL CONSENSUS TVCA.

FORECAST POSITIONS AND MAX WINDS

INIT 22/2100Z 22.3N 51.7W 30 KT 35 MPH
12H 23/0600Z 23.7N 51.8W 35 KT 40 MPH
24H 23/1800Z 25.4N 51.2W 40 KT 45 MPH
36H 24/0600Z 26.7N 49.6W 45 KT 50 MPH
48H 24/1800Z 27.7N 47.1W 50 KT 60 MPH
72H 25/1800Z 30.0N 40.5W 45 KT 50 MPH...POST-TROP/EXTRATROP
96H 26/1800Z 33.5N 34.0W 40 KT 45 MPH...POST-TROP/EXTRATROP
120H 27/1800Z...DISSIPATED

$$
FORECASTER BERG
Member Since: Posts: Comments:
Quoting LargoFl:
GFS at 144 hours............


GFS (most reliable model lately) has TD 18 way offshore. High waves/beach erosion would be the only impacts on the East coast.
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TROPICAL DEPRESSION NINETEEN FORECAST/ADVISORY NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL AL192012
2100 UTC MON OCT 22 2012


TROPICAL DEPRESSION CENTER LOCATED NEAR 22.3N 51.7W AT 22/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE NORTH OR 350 DEGREES AT 6 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
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 22.3N 51.7W AT 22/2100Z
AT 22/1800Z CENTER WAS LOCATED NEAR 21.8N 51.7W

FORECAST VALID 23/0600Z 23.7N 51.8W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 40NE 40SE 0SW 0NW.

FORECAST VALID 23/1800Z 25.4N 51.2W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 50NE 60SE 40SW 0NW.

FORECAST VALID 24/0600Z 26.7N 49.6W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 60NE 70SE 60SW 50NW.

FORECAST VALID 24/1800Z 27.7N 47.1W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 0NE 40SE 0SW 0NW.
34 KT... 60NE 90SE 80SW 60NW.

FORECAST VALID 25/1800Z 30.0N 40.5W...POST-TROP/EXTRATROP
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 50NE 80SE 60SW 40NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 175 NM
ON DAY 4 AND 225 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 26/1800Z 33.5N 34.0W...POST-TROP/EXTRATROP
MAX WIND 40 KT...GUSTS 50 KT.

OUTLOOK VALID 27/1800Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 22.3N 51.7W

NEXT ADVISORY AT 23/0300Z

$$
FORECASTER BERG
Member Since: Posts: Comments:
Quoting nigel20:


Big convection ball just south or right over the COC ready ready to explode and help build a good CDO with anticyclone right over it to prevent shear. I would not be surprise if this becomes a hurricane by tomorrow. Stay safe bro.
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18Z NAM(NON TROPICAL MODEL) hr 042 TILL 84


Member Since: July 15, 2006 Posts: 173 Comments: 54283
I see we may have Sandy and td 19 this is an amazing season could RI occur with td 18 may become a major if it continues to intensify?
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T.C.F.W
18L/TS/S/CX
MARK
13.79N/77.89W
Member Since: July 15, 2006 Posts: 173 Comments: 54283
Quoting CybrTeddy:
There we go, 50mph Flight level winds with 40mph SFC winds. Pressure down to 1001mb too. If that's the case, the COC is at 12.1N

35 knots
(~ 40.2 mph)


Wow it is at 12.1N thats interesting but how about the longitude is it closer to 80W if it is then South Florida impact would increase quite a bit.
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Quoting trHUrrIXC5MMX:
would TWC use a winter storm name for 99L besides its tropical name?
trHU....It's only Monday....Please don't ask such a difficult question
Member Since: October 3, 2008 Posts: 0 Comments: 5887
GFS at 144 hours 12z i think..................
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would TWC use a winter storm name for 99L besides its tropical name?
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Time: 20:05:00Z
Coordinates: 12.0N 77.9833W
Acft. Static Air Press: 973.5 mb (~ 28.75 inHg)
Acft. Geopotential Hgt: 256 meters (~ 840 feet)
Extrap. Sfc. Press: -
D-value: -
Flt. Lvl. Wind (30s): From 213° at 39 knots (From the SSW at ~ 44.8 mph)
Air Temp: 20.0°C* (~ 68.0°F*)
Dew Pt: -*
Peak (10s) Flt. Lvl. Wind: 40 knots (~ 46.0 mph)
SFMR Peak (10s) Sfc. Wind: 52 knots (~ 59.8 mph)
SFMR Rain Rate: 39 mm/hr (~ 1.54 in/hr)
(*) Denotes suspect data
Member Since: April 29, 2007 Posts: 0 Comments: 7930
Charleston NWS disco seems to lean towards the GFS

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
THE PATTERN GETS INTERESTING LATE THIS WEEK TOWARD THE WEEKEND. THE
EAST COAST RIDGE AXIS SHIFTS EAST IN RESPONSE TO A POWERFUL UPPER
TROUGH DIGGING INTO THE CENTRAL UNITED STATES. MEDIUM-RANGE GUIDANCE
CONTINUES TO SHOW RECENTLY FORMED TD EIGHTEEN TRACKING OVER THE
BAHAMAS AND LIFTING GENERALLY NORTHWARD INTO THE WEEKEND. THERE ARE
LARGE DIFFERENCES BETWEEN THE GFS/ECMWF/CANADIAN WITH RESPECT TO THE
TRACK AND STRENGTH OF THIS LOW. THE GFS STILL LOOKS TO BE THE MOST
REALISTIC...TAKING IT GRADUALLY NE AND E AWAY FROM THE SOUTHEAST
COAST THROUGH EARLY NEXT WEEK AS THE UPPER TROUGH DIGS SOUTHEAST.
FOR THE LATEST TRACK AND INTENSITY INFORMATION REGARDING TD
EIGHTEEN...CONTINUE TO MONITOR THE OFFICIAL NATIONAL HURRICANE
CENTER FORECAST. WE ONLY MADE MINOR TWEAKS TO THE ONGOING FORECAST
WITH SLIGHT CHANCES FOR RAIN SHOWERS OVER THE WATERS AND IMMEDIATE
COASTAL AREAS OVER THE WEEKEND. A COOL DOWN IS LIKELY SUNDAY AND
MONDAY AS A COLD FRONT MOVES THROUGH.
Member Since: August 27, 2006 Posts: 0 Comments: 1769
18Z NAM(NON TROPICAL MODEL) hr 036 TILL 84


Member Since: July 15, 2006 Posts: 173 Comments: 54283
No doubt we have TS Sandy, entire page of 40-45mph SFMR winds. Let's wait for the VDM.
Member Since: July 8, 2005 Posts: 259 Comments: 24161
NAEFS model at 162 hours.........................
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Quoting LargoFl:
GFS at 96 hours...............


Is this the 18z
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Quoting Doppler22:

Theres a first for everything


Noel 2007..it was extratropical when it came by
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Quoting LargoFl:
GFS at 144 hours............
you know thats the 12z run right
Member Since: July 15, 2006 Posts: 173 Comments: 54283
Good evening fellow bloggers! I see that TD 18 is pretty close to a TS.
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Recon now getting 60mph SFMR winds, though it appears it was rain contaminated.

9 mm/hr
(~ 1.54 in/hr)
Member Since: July 8, 2005 Posts: 259 Comments: 24161
A lot of dry air resides to the storm's NW which is typical for this time of the year. There probably will be a fair amount of convection on the west side of the storm, but the moisture gradient is going to be very tight. The east side of the storm will still be the wetter side.

Link
Member Since: August 27, 2006 Posts: 0 Comments: 1769
Recon got near 60mph winds but the rain rate was high. The highest reading with rain rates less than .75 inches per hour was 47mph.
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To me the forecast seems to hinge on how fast the High in the Carolina s moves speed wise and directionally.
Member Since: August 18, 2008 Posts: 0 Comments: 3113
GFS at 144 hours............
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Good afternoon everyone, I see I have missed a lot today. I am not surprised to see we have TD18 and 90L renumbered. Looks like we should get to at least Tony this year. I saw the 12z Euro, that would suck for millions of people. Also I noticed all the other global models make TD18 into a hurricane which I think will happen.
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Quoting Tropicsweatherpr:
46 kt FL, 35 kt SFMR, 1001mb pressure - Sandy?


No doubt @ 5pm
Member Since: August 19, 2005 Posts: 5 Comments: 5449
TD#18 has TS force winds in it its just that center is further SSW/SSW than thought.
Member Since: April 29, 2007 Posts: 0 Comments: 7930
GFS at 96 hours...............
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46 kt FL, 35 kt SFMR, 1001mb pressure - Sandy?
Member Since: April 29, 2009 Posts: 75 Comments: 14308
at the halfway pt of the season i picked 4 more cyclones well we got that and maybe another one shortly. not one of the characters except for mind said more than 2 more. hum i might of been one or two short even
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All times in GMT. Derived from NHC_ATCF data for TropicalDepressionEighteen @ 22Oct.6pm
Since the previous mapping, AL18's StormStatus on 22Oct.12pm has been reevaluated&altered from (closed)LOw to TropicalDepression
13.7n77.9w was reevaluated&altered
13.6n78.1w-13.5n78.7w are now the most recent positions

PUZ-PuertoCabezas :: PVA-Providencia :: ADZ-SanAndres :: BOC-Bocas del Toro

The kinked line traces Invest99L's path as a closed low
The westernmost dot on the kinked line is where 99L became TropicalDepressionEighteen
The easternmost dot on the longest straight line is TD.18's most recent position

The longest straight line is a straightline projection through TD.18's 2 most recent positions to its closest approach to an inhabited coastline.
22Oct.6pm: TD18 had been heading toward passage 19.6miles(31.6kilometres)South of Providencia

Click this link to the GreatCirleMapper for more info
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18Z NAM(NON TROPICAL MODEL) hr 030 TILL 84


Member Since: July 15, 2006 Posts: 173 Comments: 54283
Time: 20:01:30Z
Coordinates: 12.0667N 78.1667W
Acft. Static Air Press: 973.3 mb (~ 28.74 inHg)
Acft. Geopotential Hgt: 253 meters (~ 830 feet)
Extrap. Sfc. Press: 1001.8 mb (~ 29.58 inHg)
D-value: -
Flt. Lvl. Wind (30s): From 214° at 43 knots (From the SSW/SW at ~ 49.4 mph)
Air Temp: 23.1°C (~ 73.6°F)
Dew Pt: 22.7°C (~ 72.9°F)
Peak (10s) Flt. Lvl. Wind: 44 knots (~ 50.6 mph)
SFMR Peak (10s) Sfc. Wind: 35 knots (~ 40.2 mph)
SFMR Rain Rate: 3 mm/hr (~ 0.12 in/hr)
(*) Denotes suspect data
Member Since: April 29, 2007 Posts: 0 Comments: 7930
Quoting CybrTeddy:
TD19 is closer to becoming Sandy than TD18 is.
AL, 19, 2012102218, , BEST, 0, 218N, 517W, 30, 1006, DB


I thought it might, but we also very well might have two systems declared Tropical Storms at the same time. Like... exactly. I guess if that happened, TD18 would be Sandy because it was classified as a cyclone before 19.
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There we go, 50mph Flight level winds with 40mph SFC winds. Pressure down to 1001mb too. If that's the case, the COC is at 12.1N

35 knots
(~ 40.2 mph)
Member Since: July 8, 2005 Posts: 259 Comments: 24161
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.