Friday, December 15, 2017

The last time this happened

21 comments:
The last time this happened...
(in 2007) it did not end well.


5:30 AM Fri 12/15 - Winter Weather Advisories are posted for portions of the DC-Baltimore-Philadelphia metro regions starting at 1 PM. 

With road, air and upper level temperatures all in cold tandem, it is highly probable that any precipitation this afternoon in these regions will:
  • Fall as fine-grained snowflakes and freeze on contact with the surface;
  • Produce slippery road conditions within 30-60 mins of snow onset;
  • Cause widespread hazards during the afternoon and evening commute;



Today may be the first time since February 2007 the Baltimore region faces a decision on whether to wait for "ground truth" or pre-empt the weather with pre-announcements on the afternoon schedule. We were there for that event, and it did not go well for anyone reading this page. The comments from 10 years ago tell the story.



GFS model precip projection for 7 PM tonight.


Solutions over problems
or as Luke Skywalker has said,
"this (winter) is not going to go the way you think!"


image credit: inverse.com



Sunday, October 29, 2017

10 comments:
Why Can Autumn Tell Us About Winter?

Recent weather patterns across North America may signal
how winter begins in the Mid-Atlantic and Northeast. 

7:50 AM 10/29 - Part One of our story is to unpack how large scale influencing events in the past month may be setting in motion a pattern for first half of winter. 

Looking for something more intriguing and original? You'll have to read on to discover Part Two. We are introducing findings by high school student investigators who have uncovered surprising connections about the secrets winter has in store for us. 

PART ONE: To set the story, a look back at October:  


1) The long periods of above normal warmth in the west, evidenced by the widespread devastating wildfires that were preceded by 100 F+ temps in San Francisco;

2) The hard freeze in the central plains and deep south, with freeze warnings as far as central Alabama his weekend;

3) Prolonged warm and dry conditions in the East, interrupted by occasional cool spells.



Temperature-wise, the past month has played out a lot like what the next month is projected to do, according to the NOAA Climate Prediction Center's 3-4 week experimental outlook. The scenario we see unfolding as we turn the page to November: