Professional Forecaster experience since 1977, concentrating in Aviation, Tropical and Long Range forecasting.
By: Steve Gregory, 7:39 PM GMT on November 20, 2014
ARCTIC COLD TO RETREAT AS PROGRESSIVE FLOW DEVELOPS - MAJOR STORM ON ITS WAY
The very large upper level, long wave TROF that has dominated North America for a week now will begin lifting out to the northeast as a far more progressive, and somewhat warmer maritime influence from the Pacific over spreads the nation during the next couple days. A strong, but fast moving TROF will move across the west and deepen over the ...
Updated: 4:45 PM GMT on November 21, 2014
By: Steve Gregory, 7:44 PM GMT on November 18, 2014
COLD FINALLY REACHES EAST COAST - MODERATION TO BEGIN WEST TO EAST BY THE WEEKEND
The very large upper level, long wave TROF continues to dominate the continent, with a strong resurgence of the cold flow into the US now in the Midwest. All global models and their respective Ensemble members continue to forecast the major TROF to begin lifting out to the northeast, with a more west-to-east zonal flow working its way fr...
Updated: 7:38 PM GMT on November 19, 2014
By: Steve Gregory, 9:07 PM GMT on November 16, 2014
DEEP TROF OVER NORTH AMERICA WITH ANOTHER COLD AIR SURGE
A very large scale TROF over North America with its axis extending from Hudson Bay Canada south towards the Gulf coast states remains quasi-stationary. A fairly strong short Wave TROF and associated vorticity lobe is moving S/SE from the Canadian Plains and will cause the primary TROF to deepen again over the next few days, with another surge of arctic air moving southward behind it. ...
By: Steve Gregory, 6:49 PM GMT on November 14, 2014
DEEP UPPER TROF OVER MUCH OF NORTH AMERICA CONTINUES COLD AIR FLOW
The large upper level TROF continues to force unseasonably cold arctic air southward over much of the nation - with the exception of California A and Arizona. The much colder air is just now filtering across the eastern seaboard and deep southeast.
Temperatures will remain far below normal for NOV for areas east of the Continental Divide for the next 10 days - with a r...
Updated: 7:32 PM GMT on November 15, 2014
By: Steve Gregory, 7:31 PM GMT on November 11, 2014
DEEPENING TROF OVER MUCH OF THE NATION THIS WEEK
*** NEXT UPDATE WILL BE FRIDAY ****
As a strong TROF continues to amplify over the US, much colder air will surge south and eastward as the week progresses. Temperatures will be far below normal for NOV for areas east of the Continental Divide and into the PAC NW for at least the next 10 days as re-enforcing short-wave TROFs rotate around the main upper air TROF. As these short-...
Updated: 7:06 PM GMT on November 13, 2014