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1st tropical development prediction thread


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Since things are kinda dull right now in the weather dept...how about the start a prediction thread on where the first tropical system of the 2012 Atlantic Hurricane Season will develop...this should make for some fun.

Just to set some guidelines...you need the specify 3 things.

Where the storm forms?

When it forms? (down to a specific date or week)

And who will it affect?

I'll make my prediction later today...

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Develops in the Gulf first week of August. Landfall Central Gulf. Drifts inland and causes heavy rain in the Lower Mississippi Valley. Hopefully moderate rain in the Tennessee Valley. No help for Southeast Coast rain debt (multiple years). :cry:

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  • 2 weeks later...

815 AM EDT SAT MAY 19 2012

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

1. A NON-TROPICAL AREA OF LOW PRESSURE LOCATED ABOUT 120 MILES

SOUTHEAST OF MYRTLE BEACH SOUTH CAROLINA IS PRODUCING SHOWERS AND

THUNDERSTORMS AS IT INTERACTS WITH A MID- TO UPPER-LEVEL TROUGH.

ANY DEVELOPMENT OF THIS SYSTEM AS A TROPICAL OR SUBTROPICAL CYCLONE

IS EXPECTED TO BE SLOW TO OCCUR AS IT MOVES LITTLE OVER THE NEXT

DAY OR SO. THIS SYSTEM HAS A LOW CHANCE...20 PERCENT...OF BECOMING

A TROPICAL OR SUBTROPICAL CYCLONE DURING THE NEXT 48 HOURS. FOR

ADDITIONAL INFORMATION ON THIS SYSTEM...PLEASE SEE PRODUCTS FROM

YOUR LOCAL NATIONAL WEATHER SERVICE OFFICE AND HIGH SEAS FORECASTS

ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS HEADER

NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. ADDITIONAL SPECIAL TROPICAL

WEATHER OUTLOOKS WILL BE ISSUED ON THIS SYSTEM LATER TODAY OR

SUNDAY...IF NECESSARY.

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WTF, need mostly sun not ovc with drizzle/-rn, forecast looks abysmal over the next 3-5 as this retrogrades onshore, maybe around the tidewater, ne NC, who knows...

BULLETIN

TROPICAL STORM ALBERTO ADVISORY NUMBER 1

NWS NATIONAL HURRICANE CENTER MIAMI FL AL012012

500 PM EDT SAT MAY 19 2012

...FIRST TROPICAL STORM OF THE ATLANTIC SEASON FORMS OFF THE COAST

OF SOUTH CAROLINA...

SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION

----------------------------------------------

LOCATION...32.2N 77.7W

ABOUT 140 MI...225 KM ESE OF CHARLESTON SOUTH CAROLINA

ABOUT 120 MI...190 KM S OF CAPE FEAR NORTH CAROLINA

MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H

PRESENT MOVEMENT...SW OR 220 DEGREES AT 3 MPH...6 KM/H

MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES

WATCHES AND WARNINGS

--------------------

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

A TROPICAL STORM WATCH MAY BE NEEDED FOR A PORTION OF THE COAST OF

THE CAROLINAS TONIGHT.

DISCUSSION AND 48-HOUR OUTLOOK

------------------------------

AT 500 PM EDT...2100 UTC...THE CENTER OF TROPICAL STORM ALBERTO WAS

LOCATED NEAR LATITUDE 32.2 NORTH...LONGITUDE 77.7 WEST. ALBERTO IS

MOVING TOWARD THE SOUTHWEST NEAR 3 MPH...6 KM/H...AND A SLOW

SOUTHWESTWARD MOTION IS EXPECTED TO CONTINUE THROUGH SUNDAY. A

TURN TOWARD THE WEST-NORTHWEST AND THEN TOWARD THE NORTH AND

NORTHEAST IS EXPECTED BY MONDAY.

MAXIMUM SUSTAINED WINDS ARE NEAR 45 MPH...75 KM/H...WITH HIGHER

GUSTS. SOME STRENGTHENING IS POSSIBLE OVER THE NEXT DAY OR SO.

TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 45 MILES...75 KM

FROM THE CENTER.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1007 MB...29.74 INCHES.

HAZARDS AFFECTING LAND

----------------------

NONE

NEXT ADVISORY

-------------

NEXT COMPLETE ADVISORY...1100 PM EDT.

$$

FORECASTER BRENNAN

TROPICAL STORM ALBERTO DISCUSSION NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL AL012012 500 PM EDT SAT MAY 19 2012 SATELLITE...RADAR...AND SURFACE DATA INDICATE THAT THE SMALL SURFACE LOW LOCATED OFF THE COAST OF SOUTH CAROLINA HAS ACQUIRED THE CHARACTERISTICS OF A TROPICAL CYCLONE. ORGANIZED DEEP CONVECTION HAS BEEN PERSISTENT OVER THE CENTER FOR MORE THAN 18 HOURS...AND THE CIRCULATION CENTER HAS BEEN MOVING SOUTH AWAY FROM AN AIRMASS BOUNDARY THAT EXTENDS ROUGHLY ALONG 33N. BASED ON AN ASCAT PASS FROM AROUND 1530 UTC...THE INITIAL INTENSITY IS SET AT 40 KT. ALBERTO IS SITUATED IN A MARGINAL THERMODYNAMIC ENVIRONMENT FOR STRENGTHENING...WITH A MARKEDLY DRY CONTINENTAL AIRMASS TO ITS NORTH AND WEST OVER THE EASTERN CAROLINAS. GIVEN THIS...ONLY MODEST INTENSIFICATION IS EXPECTED DESPITE THE CYCLONE BEING OVER THE RELATIVELY WARM GULF STREAM. ALBERTO IS EXPECTED TO BECOME EXTRATROPICAL BY 96 HOURS...AND SHOULD DISSIPATE BY DAY 5. THE NHC INTENSITY FORECAST IS A BLEND OF THE MORE AGGRESSIVE STATISTICAL GUIDANCE AND THE WEAKER DYNAMICAL MODELS. THE LOW-LEVEL CIRCULATION IS A BIT TO THE EAST OF THE COLDEST CLOUD TOPS AND THE CIRCULATION CENTER SEEN ON RADAR...AND THE INITIAL MOTION ESTIMATE IS 220/03. THE SYNOPTIC ENVIRONMENT IS COMPLEX...AS ALBERTO IS IN A REGION OF WEAK STEERING FLOW WITHIN A BROAD MID/UPPER-LEVEL TROUGH. THE NHC FORECAST SHOWS A SLOW SOUTHWESTWARD MOTION OVER THE NEXT DAY OR SO DUE TO THE STRONG NORTHEASTERLY FLOW BETWEEN A SURFACE RIDGE EAST OF THE APPALACHIANS AND A LARGER EXTRATROPICAL LOW CENTERED NEAR 36N/72W. AS THAT LOW MOVES WESTWARD AND WEAKENS BY SUNDAY NIGHT...ALBERTO IS EXPECTED TO TURN NORTHWARD AND THEN ACCELERATE NORTHEASTWARD AFTER 48 HOURS AS A SHORTWAVE TROUGH MOVES INTO THE EASTERN UNITED STATES AND THE STEERING FLOW BECOMES SOUTHWESTERLY. GIVEN THE SMALL SIZE OF ALBERTO AND THE COMPLEX STEERING PATTERN...IT IS NOT SURPRISING THAT THE TRACK MODEL GUIDANCE SHOWS A LARGE AMOUNT OF SPREAD...BOTH IN TERMS OF HOW FAR SOUTH AND WEST ALBERTO WILL MOVE...AND HOW SHARP THE TURN TOWARD THE NORTHEAST WILL BE. THE NHC TRACK FORECAST IS GENERALLY CLOSE TO THE TVCA MULTI-MODEL CONSENSUS...AND IS OF VERY LOW CONFIDENCE. A TROPICAL STORM WATCH COULD BE REQUIRED FOR A PORTION OF THE COAST OF THE CAROLINAS THIS EVENING. ALBERTO IS EARLIEST-FORMING TROPICAL STORM IN THE ATLANTIC BASIN SINCE ANA IN 2003. THIS IS ALSO THE FIRST TIME THAT A TROPICAL STORM HAS FORMED BEFORE THE OFFICIAL START OF THE HURRICANE SEASON IN BOTH THE ATLANTIC AND EAST PACIFIC BASINS. FORECAST POSITIONS AND MAX WINDS INIT 19/2100Z 32.2N 77.7W 40 KT 45 MPH 12H 20/0600Z 31.9N 78.1W 45 KT 50 MPH 24H 20/1800Z 31.7N 78.5W 45 KT 50 MPH 36H 21/0600Z 31.9N 78.9W 45 KT 50 MPH 48H 21/1800Z 32.7N 78.5W 45 KT 50 MPH 72H 22/1800Z 34.5N 75.5W 45 KT 50 MPH 96H 23/1800Z 37.5N 72.0W 40 KT 45 MPH...POST-TROP/EXTRATROP 120H 24/1800Z...DISSIPATED $$ FORECASTER BRENNAN

atl_overview.gif

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Lol, thank you, thank you :) Stronger than I would have thought, and if it retrogrades too far, I'll be pretty far off, but if it does eventually go out sea, and blow out, I will go buy a lotto :) Tony

Your forecast was a lot better than some. :whistle:

815 AM EDT SAT MAY 19 2012

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

ANY DEVELOPMENT OF THIS SYSTEM AS A TROPICAL OR SUBTROPICAL CYCLONE

IS EXPECTED TO BE SLOW TO OCCUR AS IT MOVES LITTLE OVER THE NEXT

DAY OR SO. THIS SYSTEM HAS A LOW CHANCE...20 PERCENT...OF BECOMING

A TROPICAL OR SUBTROPICAL CYCLONE DURING THE NEXT 48 HOURS.

.............................

BULLETIN

TROPICAL STORM ALBERTO ADVISORY NUMBER 1

NWS NATIONAL HURRICANE CENTER MIAMI FL AL012012

500 PM EDT SAT MAY 19 2012

...FIRST TROPICAL STORM OF THE ATLANTIC SEASON FORMS OFF THE COAST

OF SOUTH CAROLINA...

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Thanks, Mr. Burns! I've been studing the Clammy Drizzle Storm Prediction cd I bought on the late night infomercial :) I really wanted Cold Rain's cd, but he's yet to produce it :) T

Ah. Well it's a bit less impressive if you used the CDSP cd, but still not a bad job.

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  • 4 weeks later...

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