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Mid to Long Range Discussion ~ 2024


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31 minutes ago, NorthHillsWx said:

If we got 1-2” 3 weeks before Christmas I’d be happy as a clam. 

Makes sense:
-Last time RDU got measurable Dec 1-15: 2018.

-Only times since 2000 with 1”+ Dec 1-15: 2018, 2002

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This is day 10 on 12Z Euro with a weak Miller A Gulf low: so still in fantasyland/low statistical credibility period on an operational and thus mainly for entertainment showing a near best case scenario kind of thing (next run very likely won’t look similar):

IMG_0822.thumb.png.d0c50a13a73a309064c7934cb4d160b2.png

IMG_0823.thumb.png.62bcb3f07de303d180516fd9e4bcabdb.pngIMG_0825.thumb.png.91181e670aa70590a7ca2cff78d653ef.png

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4 minutes ago, GaWx said:

This is day 10 on 12Z Euro with a weak Miller A Gulf low: so still in fantasyland/low statistical credibility period on an operational and thus mainly for entertainment showing a near best case scenario kind of thing (next run very likely won’t look similar):

IMG_0822.thumb.png.d0c50a13a73a309064c7934cb4d160b2.png

IMG_0823.thumb.png.62bcb3f07de303d180516fd9e4bcabdb.pngIMG_0825.thumb.png.91181e670aa70590a7ca2cff78d653ef.png

Hooray, our first fantasy snow storm.

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within 10 days on the setup..  we'll call it a plausible solution.  The cold air will definitely be there.  Won't sniff out a possible low until we're within a few days with the number of weak short waves moving underneath the PV.

There will be a healthy upper low off the CA coast by 144 hrs that'll be pumping out these waves in pieces as it presses in toward the PV.  Most will be sheared out but after the PV spins out and gives some breathing room, that'll be perfect time to pop a low in the GOM if one of these waves can phase in enough energy on the back side of the PJ/AJ.

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1 hour ago, yotaman said:

Hooray, our first fantasy snow storm.

 Per 12Z EPS fwiw, this (Gulf Miller A coming across over FL pen. and then offshore SE US with it cold enough to north) on the Euro op. is as one would expect currently only a very low probability scenario: I not surprisingly count only 3 of 50 members with something fairly close in track during a similar timeframe (members 16 and 34 have sig snow like op while member 32 has only very light snow): so only 6% of members. Member 43 track is inland and produces sig snow but further NW. If I count that it’s 4/8% of members.

 Also, member 34 actually has a second further SE tracking Miller A two days later that gives heavy snow to the SE coast similar to the very rare pre-Christmas Dec 1989 and early Jan 2018 historic heavy coastal snowstorms.

 As this period gets closer we’ll see how the various ensembles trend.
 I think this type of analysis is what was requested by 

@olafminesaw

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1 hour ago, GaWx said:

 Per 12Z EPS fwiw, this (Gulf Miller A coming across over FL pen. and then offshore SE US with it cold enough to north) on the Euro op. is as one would expect currently only a very low probability scenario: I not surprisingly count only 3 of 50 members with something fairly close in track during a similar timeframe (members 16 and 34 have sig snow like op while member 32 has only very light snow): so only 6% of members. Member 43 track is inland and produces sig snow but further NW. If I count that it’s 4/8% of members.

 Also, member 34 actually has a second further SE tracking Miller A two days later that gives heavy snow to the SE coast similar to the very rare pre-Christmas Dec 1989 and early Jan 2018 historic heavy coastal snowstorms.

 As this period gets closer we’ll see how the various ensembles trend.
 I think this type of analysis is what was requested by 

@olafminesaw

Thanks as always. Good to see at least a few digital snowstorms showing during the window. Very cold air available which has been a rarity last few years

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Here are today’s CPC days 8-14 analogs. Note the bolded, 19891221. That as many in this region know was when there was a very rare/historic SE coastal heavy snowstorm along with extreme cold for a deep SE snow (temperatures in the lower 20s with lots of wind):

19561129
19851221
19881208
20081130
19581212
20021128
19891221
19561124
19761124
19881213
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