We've been watching shear and dry air take their toll on #Isaias as shown in this 24-hour infrared imagery loop. The deepest convection (coldest cloud tops) shifts east and shrinks in coverage after 00 UTC.
Its current track, a bit west of the forecast, increases Florida risk.
Its current track, a bit west of the forecast, increases Florida risk.
Over the past 48 hours, Isaias has navigated a complex environment of mountainous island terrain (where Isaias produced strong wind and heavy rain) and, lately, increasing shear and dry air. The storm wrapping in dry air becomes readily apparent at the end of this TPW animation:
TPW = Total Precipitable Water
TPW estimates how much moisture is in the *entire* atmospheric column, so TPW doesn't show where (vertically) that moisture is. Dropsonde measurements revealed a layer where some of the (much!) drier air was near Isaias:
TPW estimates how much moisture is in the *entire* atmospheric column, so TPW doesn't show where (vertically) that moisture is. Dropsonde measurements revealed a layer where some of the (much!) drier air was near Isaias:
https://twitter.com/btangyWx/status/1289384112390717440
• • •
Missing some Tweet in this thread? You can try to
force a refresh
