My weather station says it is 18.5 outside, but in my town

[Chris the Weather Man]

it is 21 I am wondering why, there is a 2.5 degree difference? I think the town is warmer? WHat are your thoughts?

[Anonymous]

it is 21 I am wondering why, there is a 2.5 degree difference? I think the town is warmer? WHat are your thoughts?

Cities generate heat; your town could be a couple degrees warmer.




-ARCTIC BLAST JEB!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Chris the Weather Man]

Ahh Yes, Thank You jeb, I was not too sure......... ( BTW Jeb, On Sat Morning, My area could hit Zero or Below! COLD!

[Anonymous]

We just fell from 23 degrees, to 21.

The N VA region is enjoying some really spectacular winter weather tonight. Clear skies, light winds, excellent visibility, a nice night for going out on the town and taking in a nice outdoor restaurant or a quiet, leisurely jebwalk while enjoying the fresh air and clear, starry sky above.

Ah, the joys of winter.....................





-ARCTIC BLAST JEB!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Chris the Weather Man]

1 problem Jeb? Want it to be colder? need the Snowpack!

[FLguy]

thats another key here...IF we had a significant snowpack across the coastal mid-atlantic and northeast this arctic airmass would be MUCH colder.



this as the snow cover would reflect the sunlight more than the bare ground and result in less in the way of surface warming.

[Anonymous]

Yup snow would be nice........then we would have two things going for us here in the MA:

1) Daytime surface Albedo. Albedo is a measure of surface reflectivity. Fresh snowcover reflects nearly 95 percent of incoming sunlight. Areas with snowcover tend to obtain colder air temperature readings.

2)Nighttime radiational cooling processes. Snowpack at night plus dry arctic air and clear skies with light winds under high pressure is one hell of a good ticket to very low temperature readings. Snow really loses heat fast at night. One time in the winter of 95-96, I was doing a jebwalk with a thermometer. The temp plummeted to -5 degrees one night from the deep snowpack and dry arctic air plus the light winds.


BTW........We just fell to 20 degrees......9 degree dewpoint........WITHOUT snowpack.



-ARCTIC BLAST JEB!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[FLguy]

Yup snow would be nice........then we would have two things going for us here in the MA:

1) Daytime surface Albedo. Albedo is a measure of surface reflectivity. Fresh snowcover reflects nearly 95 percent of incoming sunlight. Areas with snowcover tend to obtain colder air temperature readings.

2)Nighttime radiational cooling processes. Snowpack at night plus dry arctic air and clear skies with light winds under high pressure is one hell of a good ticket to very low temperature readings. Snow really loses heat fast at night. One time in the winter of 95-96, I was doing a jebwalk with a thermometer. The temp plummeted to -5 degrees one night from the deep snowpack and dry arctic air plus the light winds.


BTW........We just fell to 20 degrees......9 degree dewpoint........WITHOUT snowpack.



-ARCTIC BLAST JEB!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Jeb --- for optimal radiational cooling overnight during the cold season one would need:

1) Clear Skies
2) light winds
3) fresh snowpack
4) low RH values (indicative of dry air)

[Anonymous]

We don't have any snow cover, but folks, we just fell to 19 degrees anyway.

WOW, what a nice crisp winter's night here in N VA

Maybe we'll luck out and hit 10 degrees...........or even 9..........





-ARCTIC FREEZE JEB!!!!!!!!!!!!!!!!!!!!!!!! Bring It!!!!!!!!!!!!!!!!!!!!!!

[Lowpressure]

15.0 on ye old patio this morning when I left for work Jeb.

[Josephine96]

Just remember.. It is usually warmer in the different reporting stations.

Prime example.. I use WeatherBug.. I have 2 local reporting stations.. 1 is about shouting distance from me and the other is about 10 miles away but still in my town..

They are never the same lol..