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The Story Behind the Weather - By Forecaster John
Ensworth M.S. -
The Discussion of Weather Events Daily for Philadelphia and Pennsylvania
Last updated: 02/24/2004 11:16 PM
Good Afternoon Philadelphia!
I'm glad to announce that these
discussions will continue until at least the end of February
(it's a short month)!
I
have the necessary server space (especially with missed days!).
In short: Chilly but calm weather wins as the high in the Great Lakes drifts in. Nothing will bother us for quite a while!
In the Long: I don't know where the snow and accumulations on the front forecast page come from... that is a goof! Things are just plain quiet.
The radar, too, is quiet.
We are in the axis of a dry northern jet stream branch trough moving past us. The precipitation this one is kicking off is way out to sea now.
The northern ridge will bring in the warmer and dry weather for us. The southern branch system will stay there...in the south (it seems).
The weather map for Wednesday night shows... more of the same. Quiet weather and rain in the deep south.
Thursday morning... yep. Quiet stuff. Sorry!
Sorry there's still not much to handle tonight. I'll see you again Wednesday!
Meteorologist John Ensworth
Surface Station sky cover color key:
Flight category definitions:| Category | Ceiling | Visibility | |
|---|---|---|---|
| Low Instrument Flight Rules LIFR* (magenta circle |
below 500 feet AGL | and/or | less than 1 mile |
| Instrument Flight Rules IFR (red circle |
500 to below 1,000 feet AGL | and/or | 1 mile to less than 3 miles |
| Marginal Visual Flight Rules MVFR (blue circle) |
1,000 to 3,000 feet AGL | and/or | 3 to 5 miles |
| Visual Flight Rules VFR+ (green circle) |
greater than 3,000 feet AGL | and | greater than 5 miles |
| *By definition, IFR is ceiling less than 1,000 feet
AGL and/or visibility less than 3 miles while LIFR
is a sub-category of IFR. +By definition, VFR is ceiling greater than or equal to 1,000 feet AGL and visibility greater than or equal to 3 miles while MVFR is a sub-category of VFR. |
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