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A Brief Period of High Pressure Before Another Cold Front

Over the next two days high pressure will briefly develop in the region. The winds will remain relatively weak and have a component from the north, cloud cover should increase, and the waves will slightly decrease. However, in 48 hours a lot of things will begin to change as a cold front passes over the boat. The largest change appears to be with the winds which will increase and swing around so that they are coming from the NE.

Current Conditions: Based on satellite imagery it appears that you are under partly sunny skies with increasing cloud cover. A region of thicker and more stratiform cloud cover is just to your west. These clouds appear to be dissipating and are rather stationary. Additionally, a band of frontal clouds is further west and is oriented SW to NE through the Bahamas and is moving eastward. This is a very long cold front, whose associated cyclone is currently located north of Maine. Based on ASCAT it appears that your winds have diminished over the last day or so and are now approximately 15-18 kts from the N. Your pressure continues to be around 1014 mb.

Short-term Forecast (0-48 hrs): It appears that a very small, weak anticyclone will pass over your region in the next day or two. However, this will quickly move off and another cold front will be just reaching you at the end of this forecast period (two days from now). The winds in ECMWF and GFS are slightly lower than your observations and ASCAT so I think you will have slightly higher winds than they forecast. The winds during this time will slightly weaker than the last few days and have a northerly component. Given the stratiform cloud cover to your west I think you will experience increasing cloud cover. Over the next two days ROTFS is consistently showing weak currents that will probably be between 0.5-1 kt and their directly looks to be quite variable. The currents may weaken slightly at the end of this forecast period. It looks like the waves will slightly decrease over the next day or so and will come more from the NE. Prior to the front the period of the waves will increase.

Long-term Forecast (48-72 hrs): By this time I expect you will be feeling the effects of the next cold front. However, ECMWF and GFS are suggesting that the front will weaken as it approaches you. This is a really tricky time for the winds. Two days from now the winds will rapidly swing around and come from the N and NE and increase in speed and be near 15-18 kts. It appears that you will be entering a regime with winds from the NE after this front. Given that the front is supposed weaken as it approaches you I do not expect you will experience strong winds from the SW. However, similar to the last front a band of clouds will pass overhead with the next front. However, it should be relatively narrow and not last too long. As the front passes I expect the waves to return to 2-3 m and 11-12 s. It also looks like the waves will turn and come from the N and then the NW by the beginning of next week.

Current Conditions (00 UTC March 15):
Pressure: 1014 mb
Winds: 15 kts from N but highly variable
Currents: 0.5-1 kts
Waves: 2-3 m, 12-13 s from NNE
Clouds: Partly – Mostly Cloudy (50-70%)

~ 12 hr Forecast (12 UTC March 15):
Pressure: 1015 mb
Winds: 10-12 kts from N but highly variable
Currents: 0.5-1 kts
Waves: 2-3 m, 11-12 s from NNE
Clouds: Partly-Mostly Cloudy (50-70 %)

~ 24 hr Forecast (00 UTC March 16):
Pressure: 1015 mb
Winds: 12-15 kts from N or NW
Currents:0.25-0.5 kts
Waves:1.5-2.5 m, 12-13 s from NE
Clouds: Partly Cloudy (40-60 %)

~ 36 hr Forecast (12 UTC March 16):
Pressure: 1016 mb
Winds: 10-12 kts from N or NW
Currents: 0.25-0.5 kts
Waves: 1.5-2.5 m, 13-14 s from NE
Clouds: Partly Cloudy (40-60 %)

~ 48 hr Forecast (00 UTC March 17):
Pressure: 1016 mb
Winds: 10-12 kts from NW
Currents: 0.25-0.5 kts
Waves: 1.5-2 m, 12-13 s from NE
Clouds: Mostly Cloudy (50-70%)

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