Friday December 13 2019

It is Friday the 13th and fresh off a Ravens victory in Baltimore. The good news is that the radar has been quiet as of 6 AM, and the risk of any ice will be confined well west in the hills and mountains.  There will be some heavy rain tonight into Saturday, then another event starting with snow and ice on Monday. First, let’s deal with the risk of icing in the Winter Weather Advisory Zone.

Ice Onset Timing

This graphic from The National Weather Service highlights the start time for any freezing rain or icing.   There may be some drizzle that is not shown on radar, so I would still be cautious in western Montgomery, Howard, and Carroll Counties, in Maryland until 9 or 10 AM


Winter Weather Advisory 

This goes through 3 PM in Maryland. The initial icing may be a four hours of a light glaze the could include parts of Carroll and Frederick County. But mostly along the I-81 corridor and westward through the afternoon.


Morning Temperatures


Ice and Rain Simulation Timeline –> slider

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Temperature (Thawing) Trend

Late Morning





Thursday December 12, 2019 in Baltimore

Average High:  46ºF

Record High: 72ºF in 2015

Average  Low: 29ºF

Record Low:  8ºF in 1960

                      *Record Snow 7.6″ in 1966

Sunrise: 7:17 AM

Sunset 4:43 PM  

*Daylight = 0:33 shorter than yesterday 

*Bay Water Temperature = 44ºF at Thomas Pt. Light House (last year was 40ºF)


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Morning Weather Map



Storm Animation Friday – Monday

Heavy rain tonight and Saturday. A closer look at the Monday snow and icy mix is below.



Rain Forecast Through Saturday


Monday Mix of Snow Ice And Rain

Note that this timeline is subject to change as model error have shown systems arriving faster and farther north

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Temperature Outlook


  • Thanks to Shannon (weather wife) for hand picking items ‘she’ wants to wear
  • The Yoga Pants have side leg pocket for your phone
  • The Hoodie is extra soft and has the important ‘thumb holes’

FITF Store: Weather Wife







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Winter Outlook Series:

My Call For Snowfall Winter 2019-2020





Snowy Winters Following A Hot and Dry September


NOAA Winter Outlook Leaves Room For More Snow With Mild ‘Seasonal Average’ Temperatures

Other  Links:

See the maps for when we normally expect the first frost in this link.

Baltimore Weather At BWI May Not Be As Hot As Reported

Construction at the airport close to the weather station may be added artificial heat. Click here or the image for the details.



Was Your County Not Included?

Click this map for more on the regional forecast zones


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