WEATHER53

1pm 30.7F. Wind chills mostly in upper teens to low 30’s 6.75” remaining on snowboard.

Temps stayed up with winds but it took until noon to get out of the single digit wind chills. 28 heresy 12 noon with overnight low of 18. Temps plummet tonight with light winds to 7 to 15

8pm 19.5 F nw wind 15 wind chill 6

High of 24.5 and currently 22.4.

On the 28th/29th we will know. The pattern now dictates to the models

3pm obs 24F which is high for the day. Max in sun radiance measured 29.8. Current wind chill 13F 7.5” on snowboard and 6-7.5 throughout yard

Our scenarios brings us back to DCA. Right now in the wind and snow cover DCA is1-2 degrees differing from its surrounds. So we conclude from this snd past experience that wind homogenizes the situation. But, on a snow covered clear and windless night DCA will be 10+ degrees milder. Where is the warmth coming from?. Not the ground, it’s got 6” snow on it, not the surrounds as they are snow covered also. Are buildings leeching out that much heat? Improbable. So gonna lay it all in the Potomac? Go ahead. I don’t. DCA is not a NWS facility but rather FAA. FAA wants conditions around the runway for the planes. Something about that is likely the culprit where wind has an effect on smoothing temps but radiational with low or no winds is artificially hampered..

Uber Impressive Chill Warning in Effect DCA is exact same temp at 11 am that it was at 6am-23F Uber!

11am 24.3 F with blowing snow pulses every 1-2 minutes, low of 18.2

Last time we had two 5”+ in a week was Jan 2016

Lots of great weather obs and discussion this week

Not saying this is he but when one can’t enjoy present moments, they can’t enjoy period.

Still in the snow shower band and have picked up 0.65 more since 5:30. storm total 5” and 9” on snowboard from both events

It’s elongated and not fast moving

6pm obs Sniw resumed within the hour at about a rate of 1/3-1/2”ph 30F

Heavy 1”+ph in Frederick

Tomorrow the Great Blizzard of 1966 was underway.. 30moh winds gusting over 40 produced greatest drifting by far I have ever experienced. Consistent 4-6’ drifts everywhere.

Snow shower approaching Frederick is intensifying.

See if these snow showers can get in. Generally they need to travel from North of Martinsburg to east of the Potomac to effect DC proper.

Pulses from the nw keep resupplying themselves and move se so 1-2 more hours of that and now the snow showers are showing up around Martinsburg and let’s see what they can do

2pm 31.4. Light snow. Just hit 8” on snowboard and still 4.25 for this one

Ma*t . I want to think about the winds tonight. We got over 6” almost everywhere and new 3-4+ of non compacted not wet snow . My memories of good blowers and drifters is 15-20 sustained just won’t quite do it but at 25 magic starts and gusts to 35 causes white out. What did you think and any others who might be versed in this? Thanks

60 second visit outside do you a lot of good

1pm obs and updates 4.25 new. 8-8.5 on snowboard. 7-7.5 in full sunshine yard areas. I cleared walk and put thermometer down on it to get a max radiance temp at prime sun and it was 34.5 0.25” in last hour and 31.7F

Yeah it’s not slippery now as iciness covered with fresh dry snow