Thursday December 13 2018
It’s been a while since we had rain. The headline here could be that Baltimore has not had measurable rain in 11 days, since December 2. But that is about change and go figure it would happen on a Friday into the weekend. This brings us back to the old Fall pattern that includes heavy rain. As a result, NWS has issued a Flood Watch for all of central Maryland and into eastern Virginia.
Added To The Record
The expectation of over 2 inches of rain will increase our already record wet year.
Rain Forecast: What To Expect
Rain will expand from south to north Friday afternoon and evening. It may be at its heaviest during the day Saturday. Thanks to an upper level system, this storm will linger into Sunday only to be followed by colder air Monday (which I still think may bring snow showers to parts of our area). The net result could bring between 1 and 3 inches of rain to the area.
Here is a look at two models run expectations.
The European ECMWF has
- 1.5″ to 2″ range in Baltimore and central Maryland
- 1.1″ in York PA
- 1.3″ to 1.6″ across southern Maryland to Ocean City
The NAM 3 Km Model is much more aggressive:
- 2.7″+ in Baltimore and central Maryland
- 1.4″ in York PA
- 2″ to 3.1″ Maryland to Ocean City
Rain Timeline–> sliders
Here is the NAM break down
Arrival mid afternoon making a wet evening
- Moderate to heavy rain at any point in the day.
- This is the most likely time to have flooding. We could have some claps of thunder.
Sunday: Showers will linger under the upper low as shown in the animation below.
Is This A Hint For Snow?
On the bright side, if you anxious for winter weather… we might have some thunder. The old Weather Folklore saying supports: “If in winter you hear thunder, snow will follow in a week or under”.
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