HTMC Hypothetical Hurricanes Center/01L.ALBERTO

Hypercane ALBERTO

As of 05:15 UTC February 27, 2018:


 * Maximum sustained winds: 480 kt (555 mph)
 * Gusts: 515 kt (590 mph)
 * Minimum pressure: 568 mb

64 kt wind radii by quadrant:

Storm Advisories
HYPERCANE ALBERTO PUBLIC ADVISORY NUMBER 6 2:15 AM EDT TUE FEB 27 2018 ...2:15 AM POSITION UPDATE...ALBERTO MOVES SSE...SPARING NORTH CAROLINA... MAXIMUM SUSTAINED WINDS...555 MPH...895 KM/H PRESENT MOVEMENT...SSE AT 9 MPH MINIMUM CENTRAL PRESSURE...568 MB HYPERCANE ALBERTO DISCUSSION NUMBER 6 HTMC TOLEDO OH AL012018 2:15 AM EDT TUE FEB 27 2018

Alberto continues to explosively deepen. Two recently dropped dropsondes into both the eyewall and eye revealed unimaginable results. The first one inside the eye measured a pressure of 568 mbar at the surface, and the second one recorded a SFMR wind gust of 495 kt. Based on these observations and Dvorak satellite estimates of around T12.0, the initial intensity has been raised to 485 kt, making Alberto a hypercane. This is the first such storm ever recorded on the globe, and it is scary that us here at HTMC were the first to observe this kind of storm.

Alberto seems to have also reached its peak intensity, as indicated by some warming of the cloud tops of the storm. The storm has also seemed to take a southeastwards turn, sparing North Carolina. As such, the United States is no longer likely to experience a landfall, however, due to the massive wind field of the cyclone, tropical storm force winds will likely be felt up and down the East Coast for about another day or so before winds subside. Huge swells will still likely impact the regions as well. The forecast for Alberto is expected to begin a more northeastwards turn, alias at a slow pace, as such, Alberto will slowly weaken over the next two days, dropping below hypercane status by tomorrow afternoon. After that, the cyclone will begin to accelerate to the east and a more steady weakening phase should ensue. Past that point, there is still uncertainty on if Alberto will strike the Azores, as well as the intensity by that point as well.

FORECAST MAX WINDS

INIT 27/0500Z...480 KT.....555 MPH 12H 27/1700Z...460 KT.....530 MPH 24H 28/0500Z...440 KT.....505 MPH 36H 28/1700Z...435 KT.....500 MPH 48H 01/0500Z...410 KT.....475 MPH 72H 02/0500Z...365 KT.....420 MPH 96H 03/0500Z...315 KT.....365 MPH 120H 04/0500Z...215 KT.....250 MPH

$$ Forecaster Hype NNNN