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January Pattern and Storm Discussion II


Cold Rain

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Thanks!

 

That was the link I lost! 

Thank you!

 

As far as the cold, if you're looking at those two, they're all over the place at that distance right now. Read the model diagnostic discussion and you can see what models the HPC is using and what their confidence is in them, http://www.daculaweather.com/4_hpc_model_diag_disco.php

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This is the aftn CPC forecast for next Mon-Fri (500mb 5-day mean based on a model blend).  It’s chilly obviously, with a mean Eastern U.S. trough.

 

One of the listed analog dates, 01/09/1982, was one day prior to the 2nd coldest NFL football game ever played based on temperatures, and coldest of all-time based on wind chill values.  It was dubbed the “Freezer Bowl”, and was the AFC Championship Game in Cincinnati between the Bengals and Chargers.  The temperature was -9 F with a wind chill of -27 F (-59 F using the now outdated wind chill formula).

 

Another listed analog date is 01/17/1994.  Raleigh had a hi/lo temperature of 21/3 the day prior (01/16/1994).  I was a student at NC State living on Brent Rd at the time, and as I recall, we lost power one of those cold nights – we were burning every damn thing we could find in the fireplace.

 

Lastly, I looked at snowfall:

 

For Charlotte, there was accumulating snowfall within 5 days of the listed analog date in 5 of the 10 cases.

 

For Raleigh, there was accumulating snowfall within 6 days of the listed analog date in 7 of the 10 cases, most notably, the clipper that brought 4-7 inches of snow to the Raleigh area on 01/20/2009.

 

It makes sense that the pattern shown would support northern stream clippers.


http://imageshack.us/photo/my-images/809/cpc8.png/'>cpc8.png

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This is the aftn CPC forecast for next Mon-Fri (500mb 5-day mean based on a model blend).  It’s chilly obviously, with a mean Eastern U.S. trough.

 

One of the listed analog dates, 01/09/1982, was one day prior to the 2nd coldest NFL football game ever played based on temperatures, and coldest of all-time based on wind chill values.  It was dubbed the “Freezer Bowl”, and was the AFC Championship Game in Cincinnati between the Bengals and Chargers.  The temperature was -9 F with a wind chill of -27 F (-59 F using the now outdated wind chill formula).

 

Another listed analog date is 01/17/1994.  Raleigh had a hi/lo temperature of 21/3 the day prior (01/16/1994).  I was a student at NC State living on Brent Rd at the time, and as I recall, we lost power one of those cold nights – we were burning every damn thing we could find in the fireplace.

 

Lastly, I looked at snowfall:

 

For Charlotte, there was accumulating snowfall within 5 days of the listed analog date in 5 of the 10 cases.

 

For Raleigh, there was accumulating snowfall within 6 days of the listed analog date in 7 of the 10 cases, most notably, the clipper that brought 4-7 inches of snow to the Raleigh area on 01/20/2009.

 

It makes sense that the pattern shown would support northern stream clippers.

 

cpc8.png

 

I really think we're gonna get nicked by a clipper with this pattern. It's also a nice pattern for arctic front snow with any reinforcing shots.

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http://www.daculaweather.com/4_hpc_extended_disco.php

 

 

EXTENDED FORECAST DISCUSSIONNWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD114 AM EST WED JAN 16 2013VALID 12Z SAT JAN 19 2013 - 12Z WED JAN 23 2013BY THE END OF THE MEDIUM RANGE PERIOD THE RIDGE/TROUGH PATTERNACROSS THE CONUS MAY START TO BREAK DOWN. THE UPPER VORTEX OVERHUDSON BAY IS FORECAST TO LIFT TO THE NORTHEAST WHICH ALLOWSNORTHERN ENERGY TO RIDE THE NORTHWEST FLOW OUT OF CANADA THROUGHTHE GREAT LAKES AND NORTHEAST... BRINGING IN THE COLDEST AIR OFTHE WINTER TO MANY PLACES. THE MODELS AND ENSEMBLES REMAIN IN GOODSYNOPTIC AGREEMENT AND HAVE FINALLY COME CLOSER TOGETHER ON THETIMING/DEPTH OF THE ARCTIC AIRMASS EARLY NEXT WEEK. QPF POTENTIALSTILL LOOKS LIGHT OVERALL OUTSIDE THE FAVORED LAKE EFFECT AREASINCLUDING UPSLOPE AREAS OF THE CENTRAL APPALACHIANS.
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I really didn't think so.....now if you want the cold air to last and last and last, then yes you are correct. 

 

But....there's lots of cold air lurking and possible waves riding along the southern tier. 

 

I really didn't think so.....now if you want the cold air to last and last and last, then yes you are correct. 

 

But....there's lots of cold air lurking and possible waves riding along the southern tier. 

Agree.  I think the overall look is a promising one.

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Still going.

 

 

FJXN20 RJTD 160500STRATALERT TOKYO 16 JAN2013 0500 UTC30-HPA ANALYSIS 1200UTC 14 JAN1. COLD MINUS 80 58N 117W,   COLD MINUS 68 48N 67E,   WARM MINUS 33 70N 90E,   LOW  230 68N 102W,   LOW  250 58N 75E,   HIGH 372 62N 9W,   HIGH 364 70N 170E.2. CONDITIONS   AT 30-HPA HEIGHT FEILD,   POLAR VOLTEX SPLIT INTO TWO NEAR NORTHERN CANADA AND   OVER WESTERN SIBERIA.   COLD AIR LIES OVER NORTHERN CANADA AND OVER CENTRAL ASIA.   WARM AIR LIES OVER CENTRAL SIBERIA.   IN THE ZONAL MEAN FIELD,   EASTERLY WIND IS OBSERVED THROUGHOUT THE STRATOSPHERE   OVER THE POLAR REGION.3. STRATALERT EXISTS.   MAJOR WARMING HAS CONTINUED AT 30-HPA.   TEMPERATURE OVER NORTHERN EUROPE INCREASED WITH   MAXIMUM 24 DEGREES FROM 7 JAN TO 14 JAN 2013.
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