FREAK OF NATURE ARLENE FORMS IN COLD ATLANTIC WATERS

Here is the storm map models and track!

 

TO ME THIS IS NOT NORMAL TO SEE SUB-TROPICAL TURN TROPICAL IN 19°C TEMPS

Hmm... this satellite imagery shows a better overall cloud pattern tropical not sub-tropical and just check this system has transitions to a tropical depression in 19°C sea surface temps. Geo-Storm or what, it makes you wonder. There are no logic's behind this, when these tropical systems are defying all meteorological standards of a tropical system development in an unfavorable environment. You can almost begin to name this one since it has an eye like feature.

NHC says "This transition is a common process..." I say yes it would be to see a sub-tropical system turn tropical in nature, but not in 19°C seas surface temps. This is not a normal transition folks.  19°C = 66.2°F...Tropical.

Wiki:
There are six main requirements for tropical cyclogenesis: sufficiently warm sea surface temperatures, atmospheric instability, high humidity in the lower to middle levels of the troposphere, enough Coriolis force to develop a low pressure center, a preexisting low level focus or disturbance, and low vertical wind shear.

Normally, an ocean temperature of 26.5 °C (79.7 °F) spanning through at least a 50-metre depth is considered the minimum to maintain the special mesocyclone that is the tropical cyclone.[3] These warm waters are needed to maintain the warm core that fuels tropical systems. This value is well above 16.1 °C (60.9 °F), the global average surface temperature of the oceans.

TROPICAL DEPRESSION ONE DISSIPATING AS IT MERGES WITH STRONGER LOW

TROPICAL DEPRESSION ONE IS GRADUALLY LOSING SUB-TROPICAL CHARACTERISTICS AS IT MERGES WITH AN EXTRA-TROPICAL LOW MUCH STRONGER THAN THE DEPRESSION. DISSIPATING RATHER FAST AND WE MAY SEE THE LAST ADVISORY ISSUED TONIGHT OR TOMORROW MORNING.
RTW

PLEASE SUPPORT MY WEBSITE: http://ralphstropicalweather.myfreesites.net

SUB-TROPICAL DEPRESSION ONE EXPECTED TO MERGE AND DISSIPATE ON THURSDAY

A STRONG EXTRA-TROPICAL LOW TRACKING EAST TOWARD SUB-TROPICAL DEPRESSION ONE WILL ABSORB THE DEPRESSION ON THURSDAY.  THE EXTRA-TROPICAL SYSTEM COULD STRENGTHEN SOME AS IT TRACKS OUT OVER THE NORTH ATLANTIC.  ONLY A THREAT TO SHIPPING.

RTW

UPDATED MIAMI AND VICINITY FORECAST

Tonight Apr 19, 2017

Partly cloudy with isolated showers: Lows around 73°F.  East wind 7 to 13 MPH, gusting to 21 MPH. Chance of rain 20 percent.

Thursday Apr 20

Partly cloudy with isolated showers during the day: Highs around 82°F.  East wind 9 to 16 MPH, gusting to 23 MPH. Chance of rain 20 percent.

Partly cloudy   Night:  Lows around 72°F.  East wind to 14 MPH, gusting to 21 MPH.

Friday Apr 21

Mostly sunny during the day:  Highs around 82°F.  East wind to 13 MPH.

Mostly clear during the night:  Lows around 73°F.  East wind 5 to 12 MPH.

Saturday Apr 22

Partly cloudy with isolated showers during the day:  Highs around 84°F.  East southeast wind 5 to 14 MPH.  Chance of rain 20 percent.

Partly cloudy with isolated showers during the night:  Lows around 75°F.  East southeast wind to 11 MPH.  Chance of rain 20 percent.

Sunday Apr 23

Partly cloudy with isolated showers during the day:  Highs around 84°F. Southeast wind 6 to 13 MPH. Chance of rain 30 percent.

Partly cloudy with isolated showers during the Night: Lows around 73°F.  South wind to 8 MPH.  Chance of rain 30 percent.

Monday Apr 24

Partly cloudy with isolated showers during the day:  Highs around 84°F.  West wind to 10 MPH. Chance of rain 30 percent.

Partly cloudy with isolated showers during the night:  Lows around 70°F.  West northwest wind 4 to 9 MPH, gusting to 14 MPH. Chance of rain 30 percent.

Tuesday Apr 25

Mostly sunny during the day:  Highs around 81°F.  West northwest wind to 8 MPH.

Mostly clear during the night:  Lows around 68°F.  East northeast wind to 8 MPH.

TOMORROW'S THUNDERSTORM OUTLOOK

Hail Point®‏ @HailPoint 16

Tomorrow's Severe Thunderstorm Outlook. #Hail #PDR #Roofing #Insurance #HailPoint

INVEST 91L GATHERS SOME ORGANIZATION TO GET A SUB-TROPICAL STATUS

THIS MORNING INVEST 91L STARTED RAPPING THUNDERSTORMS AROUND THE CENTER OF CIRCULATION AND WINDS INCREASING TO DEPRESSION STRENGTH.  THIS PROMPTED THE NATIONAL HURRICANE CENTER TO GIVE THE INVEST A SUB-TROPICAL DEPRESSION STATUS.

THIS SYSTEM WILL BE SHORT LIVED AS IT MERGES WITH AN EXTRA-TROPICAL LOW TO THE WEST NORTHWEST OF SUB-TROPICAL DEPRESSION ONE'S PRESENT POSITION.

HERE IS A LINK TO MY TROPICAL WEATHER WEBSITE!
http://ralphstropicalweather.myfreesites.net

UPDATED MIAMI AND VICINITY FORECAST

Tonight Apr 18, 2017

Partly Cloudy:  Lows around 72°F.  East wind to 14 MPH.

Wednesday Apr 19

Partly cloudy with isolated showers during the day:  Highs around 81°F.  East wind 10 to 18 MPH, gusting to 24 MPH.  Chance of rain 20 percent.

Partly cloudy with isolated showers during the night:  Lows around 73°F.  East wind 7 to 17 MPH, gusting to 22 MPH. Chance of rain 20 percent.

Thursday Apr 20

Partly cloudy with isolated showers during the day:  Highs around 81°F.  East wind 8 to 18 MPH, gusting to 24 MPH.  Chance of rain 20 percent.

Partly cloudy with isolated showers during the night:  Lows around 72°F.  East wind 10 to 15 MPH, gusting to 20 MPH.

Friday Apr 21

Mostly sunny during the day:  Highs around 82°F.  East wind to 13 MPH.

Mostly clear during the Night:  Lows around 73°F.  East wind to 13 MPH.

Saturday Apr 22

Mostly sunny during the day:  Highs around 82°F.  East southeast wind to 14 MPH.

Partly cloudy with isolated showers during the night:  Lows around 73°F.  East wind to 14 MPH.  Chance of rain 20 percent.

Sunday Apr 23

Partly cloudy with isolated showers during the day:  Highs around 82°F.  Southeast wind to 15 MPH.  Chance of rain 30 percent.

Partly cloudy with isolated showers during the night:  Lows around 73°F.  South southeast wind to 12 MPH.  Chance of rain 40 percent.

Monday Apr 24

Partly cloudy with isolated showers during the day:  Highs around 84°F.  West southwest wind 8 to 14 MPH.  Chance of rain 40 percent.

Partly cloudy with isolated showers during the night:   Lows around 64°F.  West wind 8 to 14 MPH.  Chance of rain 30 percent.