Welcome to Jason Godwin's weather website. I am a second-year graduate student at the University of Miami Rosenstiel School of Marine and Atmospheric Science. On this website, I post blogs on tropical meteorology and other interesting weather phenomena, as well as some information on some of my research (which lies in tropical cyclone predictability).
High pressure has now settled in over the central and eastern United States with frigid temperatures
being felt over much of the country. Denver set a new daily record low and came within a few degrees
of recording the all-time record low for the month of November when the temperature there bottomed
out at -14 F. Combined with a 12 MPH wind, this resulted in a wind chill of -35 F! The bad news for
warm weather lovers is that given the current northern hemisphere longwave pattern, it does not look
like the cold weather will be moving out very soon. The GFS supports this, showing below normal
temperatures remaining over the continental U.S. through the weekend and into next week.
Meanwhile, another strong upper-level shortwave trough will swing into the Pacific Northwest, bringing snow chances to much of Idaho and Oregon, as well as portions of Washington, Utah, Nevada, and Wyoming. Widespread snowfall totals of at least six inches are expected over northwest Oregon and southwest Idaho with accumulations of over two feet possible in some places, especially in higher elevations.
GFS forecast snowfall accumulation ending Sunday, November 16 5:00 AM MST (4:00 AM PST).
At 5:00 AM EDT this morning, the NHC upgraded Arthur to a hurricane based on reconnaissance data. This afternoon, Arthur
is looking even more impressive on satellite with a clear eye now beginning to develop. Aircraft reconnaissance is investigating
Arthur now, so we should be able to see just how much Arthur has strengthened in a bit.
Radar data suggests that the strongest winds associated with Arthur are within 20 miles of the eye on the north and east sides of the storm in the eyewall where winds of 90-100 MPH are being measured. Hurricane force winds extend outwards to about 40 miles and tropical storm force winds to about 90 miles.
While Arthur is a fairly small storm, the model forecasts seem to be coming into agreement that Arthur will make landfall around Morehead City and track west of the Outer Banks over Pamlico Sound. This will place the Outer Banks in the strongest winds. Wind gusts of over 100 MPH will not be out of the question for the Outer Banks.
If you are still on the Outer Banks, it is strongly suggested that you get out now while there is still time. If you plan on staying, prepare for wind gusts in excess of 100 MPH and the potential for 3-6 feet of storm surge inundation. Preparations for Hurricane Arthur should be rushed to completion.
Compared to this time yesterday, Arthur has become much better organized with an eye-like feature now evident on radar
imagery. As of the 11 AM advisory this morning, Arthur has maximum sustained winds of 60 MPH and a minimum central
pressure of 997 mb, making Arthur a moderate tropical storm. The strongest winds are on the east side of the storm.
The forecast for Arthur has changed little in the last 24 hours, with the forecast reasoning generally the same. Arthur is expected to continue moving north, with an eventual turn to the northeast in response to a trough of low pressure exiting the east coast of North America. This forecast track should bring the center of Arthur very near or over the North Carolina Outer Banks Thursday night or early Friday morning. Arthur remains over the warm waters of the Gulf Stream and in an area of very low wind shear, but is still fighting some dry air to the north. This has been inhibiting Arthur somewhat, but steady strengthening is still expected, and Arthur could become a hurricane later today. Since Arthur is expected to affect the North Carolina Outer Banks as a hurricane Thursday night and Friday morning, Hurricane Watches have been posted for that area. Interests in northern coastal South Carolina, eastern North Carolina, Hampton Roads, the Virginia Eastern Shore, Cape Cod, Nova Scotia, coastal New Brunswick, and Newfoundland should monitor the progress of Arthur.
Sustained winds of 38 MPH have been reported at Settlement Point in the Bahamas, and given that this occurred outside
of where the strongest thunderstorm activity is occurring, the NHC has upgraded T.D. #1 to a tropical storm ("Arthur").
The track forecast is generally unchanged with a westward drift expected to continue for the next 12 hours or so. After
that, Arthur should begin to accelerate off the north in response to a trough of low pressure moving into eastern Canada
and the northeastern United States. By Thursday, Arthur should turn more to the northeast and accelerate more, passing
close to the North Carolina Outer Banks as a high-end tropical storm or low-end category one hurricane (the official forecast
calls for Arthur to be a category one hurricane with 80 MPH winds Friday morning as it passes very near Cape Hatteras). The
tropical storm watch from Flagler Beach to Fort Pierce continues, though more watches may be needed farther north in the next
few days. Interests in the central and northern east coast of Florida, coastal Georgia, coastal South Carolina, eastern North
Carolina, southeastern Virginia, and the Virginia eastern shore should monitor the progress of Tropical Storm Arthur.
The first tropical cyclone of the 2014 Atlantic hurricane season has formed off the east coast of Florida. As of
the 10 PM advisory from the National Hurricane Center, Tropical Depression #1 has maximum sustained winds of 35 MPH.
Earlier today, Hurricane Hunters found a closed circulation, but lack of organization kept the NHC from classifying
the invest area as a tropical depression. Infrared satellite imagery this evening indicates that intense thunderstorm
activity has wrapped around the center of the low, and has persisted for a while, leading the NHC to classify the system.
T.D. #1 is over warm waters and in an environment with low to moderate wind shear. Given this environment, T.D. #1 is expected to intensify during the next few days. Most of the intensity model guidance from this evening supports this forecast, with virtually all models bringing T.D. #1 to tropical storm status by Wednesday morning. A few of the models actually bring T.D. #1 all the way to hurricane intensity late in the forecast, but given that eventual land interactions are possible, as well as cooler water temperatures and increasing wind shear, for now, it looks like it will remain below hurricane strength.
The track guidance is fairly tightly clustered, with basically all models agreeing on a very slow westward motion for the next 24 hours, then an acceleration towards the north beginning on Wednesday night, with an eventual turn to the northeast by Friday. On the current forecast track, T.D. #1 should get very close to the Carolina coasts Thursday and Friday. The NHC has posted tropical storm watches for the Florida coast from Flagler Beach south to Fort Pierce. It is likely that watches will be extended northward over the next few days.
Given that the center should remain offshore (even if it gets very close to shore), the heaviest rains (on the right side of the storm) should remain offshore as well. Still, rainfall totals of one to two inches will be widespread along the coasts of Florida, Georgia, and the Carolinas this week, with some areas receiving up to four or more inches of rain. People along these coasts, including places like Daytona Beach, Jacksonville, Savannah, Charleston, Myrtle Beach, and Wilmington should prepare for the possibility of tropical storm conditions in the next few days: heavy rains, winds of over 40 MPH, and possibly a few isolated tornadoes. In addition, rough seas and strong rip currents can be expected at beaches along the southeastern United States coastline.
I will continue to update this post as new information comes out during the next several days.