Hurricanes, Cold Fronts & High Pressure
Posted by Jeremy Reiner
Quite a few weather players on the board this morning. A powerful cold front barreling east through the Ohio River valley....a huge area of high pressure in Canada (Labrador) and of course, Hurricane Sandy. All three play a role in our weather. If it wasn't for that Canadian high pressure, Sandy and the cold front would collide out over the open Atlantic but that large H will force that collision of storms right along the eastern seaboard over the next 2 days.
Confidence continues to climb that Sandy will make landfall across southern New Jersey late Monday evening and continue into northwest Pennsylvania on Tuesday. A track that far southwest wouldn't normally be of concern to us but Sandy is an expansive storm. for that reason, we need to prepare for a period of heavy rain & high wind.
Here's what I'm thinking:
*Earliest effects from Sandy arrive very early Monday morning with periods of rain & wind (wind gusts 15-30mph)
*The worst from Sandy looks to occur in a window from 11am MONDAY until 2 am TUESDAY. Within this period is our greatest risk of wind damage/power loss. Many towns will experience wind gusts over 40mph during this time & coastal cities & towns may see wind gusts between 50-60mph. the concern isn't so much the speed itself but the duration as several hours of 40mph wind gusts may be able to bring down trees & power lines.
*High tides on Monday...11:30am and again at midnight will have to be watched for the threat of coastal flooding
*Rainfall looks manageable. Most towns look to pick up 1-3" of rain Monday-Monday Night. This will likely lead to some urban flooding but not enough for widespread river flooding.
Between now & then is the weekend. Today is a nice day with sun & clouds, light wind and temps in the low 60s. Sunday does offer cloudy skies, a few isolated showers and a developing breeze (northeast wind 7-20mph).
More through the day & weekend. Be safe!