Thoughts on December 5th Snowstorm...
Well surprise, surprise... It appears for once we have a decent coastal storm to start December. But look at that date, the infamous and magical December 5th did its dirty work again. This will be the third year in a row for accumulating snow on December 5th here in Harrisburg and many surrounding areas along with many other past seasons also. I think this storm is going to take many average "joe" citizens by the surprise. For those of us in the Middle Atlantic it looks like most of us will cash in with at least a coating or more and some areas unexpectantly may be the jackpot areas where originally it looked like meager accumulations. I am quite enthused for this event considering March 1 was the last accumulating snowfall for many areas. This snowstorm may help to push snow totals across the southern Middle Atlantic for average accumulation for the entire month. Keep in mind December monthly totals are rarely above 5in in the Middle Atlantic. I do not have too many immediate concerns for this system, even though the forecast has changed dramatically in the last 12hrs. Initially at the beginning of the week this chance looked very good with an amplflied trough and strong southwest cutoff allowing the trough to turn negatively tilted. The main factor lacking was a high pressure to the north and upstream blocking. But during the week models moved east with the system which made some sense, but did not. First off low pressures near the Panhandle of Florida typically do track near benchmark or east especially without a real arctic airmass with an anomalous negatively tilted trough, but without upstream blocking in this scenario I saw it being trended west and not east. Think of it this way, without blocking many times storms track to our west and not east. Anyways then the GFS and ECMWF showed great interaction between a Pacific Northwest shortwave and a Great Lakes cutoff weak shortwave. This was the initiating feature to push this storm west and this type of interaction is often the kiss of death for coastal runners. But along came the high resolution model, which is actually very good at predicting coastals, but anyways it came along and showed a farther west low. Many meteorologists threw the NAM out being 84hrs out at the end of the NAM range. But then the models began to swing west and this is now continuing. There is quite a bit of gulf moisture; note current Florida radar. A widespread snowstorm is coming with initially rainfall south of the Mason-Dixon line. There are a lot of things on my to do list tonight for making this forecast, but I think this blog will be completely finished by 10pm or so. So who is ready!!!
Timeline...
COMING SOON!!!
***The timeline for the second system will be issued tomorrow afternoon.
Radar...

Warnings...

NAO...

This is my current rain/snow line...
It appears that cold air will be a problem for those south of the Mason-Dixon Line especially below 700ft. Many areas will start out as rain with nearly .25in QPF being used for pure rain especially towards I-95 on southward including the major metropolitans. But as the storms wraps out off the coast it appears cold air will be pulled from the northeast as the primary winds will be out of the north-northeast instead of the east. Therefore this will cause a limited effect on surface temperatures on the coast from the warm SSTs of the Atlantic. Most areas will turn to snow by the second half of the storm with additional QPF for all areas. Many areas south of the Mason-Dixon line will also have ground temperature problems with areas to the north of the line having initial problems. But from north to south snow will accumulate courtesy of colder air and increase in precipitation rates. This rain/snow line is a rough estimate for the precipitation types during the height of the storm.
My rain/snow line is... Charlottesville, VA - Dale City, VA - Annapolis, MD - Georgetown, DE - Lakewood, NJ
*Note these lines are estimates and actual locations may vary. Snow is north of line, rain is south.
Storm Reports...

*Note in general the forecast was a success!
Storm Impacts...
1. First accumulating snow for season in Middle Atlantic.
2. Initially snow melts upon contact before precipitation rates increase.
3. Snow accumulations will not exceed 6in for most locales.
4. Rain/snow mix is likely towards southern Maryland and southern Delaware.
5. Widespread impacts up and down the I-95 corridor.
Snow Map...

*Note especially in the 3-6in region, it is a bit elevation specific and most areas will be in the lower range of that total but isolated 6inches are possible especially towards the Chester County hills in the northwestern part of the county.
Selected City Accumulations for the Northeast...
Hagerstown, MD- Moderate snow likely; 3-5inch
Baltimore, MD- Rain and snow to all snow; 2-4inch
Washington, DC- Rain and snow to all snow; 1-4inch
Wilmington, DE- Rain and snow to all snow; 1-4inch
Dover, DE- Rain and snow to all snow; 1-3inch
Cape May, NJ- Rain with a few flakes; Trace of snow
Trenton, NJ- Rain and snow to all snow; 1-3inch
New York City, NY- Rain and snow to snow; slushy accumulation of 1-3inch
Poughkeepsie, NY- Moderate snow at times; 2-4inch
Binghamton, NY- Periods of light snow; 1inch
Albany, NY- Light snow showers; Coating of snow
Hartford, CT- Rain and snow to all snow; 1-4inch
Concord, NH- Periods of light snow; 1inch
Providence, RI- Rain and snow to all snow; 1-3inch
Worcester, MA- Moderate periods of snow; 2-5inch
Boston, MA- Rain changing to snow; 1-2inch
Nantucket, MA- Mostly rain with a few flakes; Trace of snow
Hyannis, MA- Rain and snow; Slushy accumulation C-1inch
Portland, ME- Intermittent light snow; 1inch
Bangor, ME- Light snow showers; C-1inch
"Subject to Change"
Model Analysis
COMING SOON!!!
After the storm...
It appears next week will be quite active with a large amplified storm affecting the Middle Atlantic around the Wednesday time frame. Despite the ECMWF and GFS guidance forecast a Ohio Valley system, I think this has the option to develop a secondary low off of the Delmarva to save us north of the Mason-Dixon line and allow for some accumulating snow. This recent 18z GFS run shows the option beautifully along with the 12z UKMET on board also. I am definitely watching this period as it looked favorable back in November where I highlighted the threat around the 28th. It all depends on if we can get a secondary low pressure to form. At least 1inch of front-end snow is somewhat likely especially across northern Maryland on northward, but southward trends have been noted on several of the models as this system is accompanied by a strong cold front. This cold front will allow for the first cold blast of the season towards the end of next week. Cold air is building across western Canada courtesy of the retrograting Polar Vortex into the region, which will allow for some cold air to begin to advect into the United States. It appears H85s will drop below -10C for many across the northern Middle Atlantic allowing for highs in the 30s for temperatures around 5-10F below normal. This cold blast has been highly advertised on the models for the past 7-10 days. We still are lacking upstream blocking courtesy of the east based negative NAO so storms tracking to our west through the next week or two are definitely possible, but I am keeping a close eye on the system for next week.
Please post storm reports in this blog from across the Northeast during the winter storm...
This blog is in progress. Check back soon...
"Here northeast of Harrisburg 2009-2010 winter statistics"
(Snow Stats)
Current Snow Cover- 0.5in
Monthly Total- 4.0in
Seasonal Total- 4.0in
Winter Weather Advisories- 2
Winter Storm Warnings- 0
Ice Storm Warnings- 0
Blizzard Warnings- 0
Freezing Rain Advisories- 1
Winter Storm Watches- 0
(Temperature Stats)
Lowest High Temperature- 30.6F
Lowest Low Temperature- 17.1F
Wind Chill Advisories- 0
Wind Chill Warnings- 0
(Snow Storms Stats)
Dec 5 - 1.5in - First accumulating snow of season
Dec 8-9 - 2.5in - Snow changed to plain rain
Summit of Blue Mountain (elevation ~1300ft), just northeast of Harrisburg, PA. About 1.5-2inches of accumulated snowfall so far.
Summit of Blue Mountain (elevation ~1300ft), just northeast of Harrisburg, PA. About 1.5-2inches of accumulated snowfall so far.
Summit of Blue Mountain (elevation ~1300ft), just northeast of Harrisburg, PA. About 1.5-2inches of accumulated snowfall so far.
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Lake effect will be a part of this snow event. Cold Northeast to North winds wind cause significant lake enhancement over my area. Snowfall by Wednesday afternoon is likely to reach 15 inches in my area. Another 3 to 5 inches of snow is likely Wednesday night. After that, the winds are going to turn west bringing the LES into the Keweenaw. However, snow to water ratios will plummet as arctic air rushes in, resulting in advisory snowfall.
Northeast winds look gust to around 50mph on Wednesday. These winds will create 15 to 20 foot swells on the lake. Since the waves will comming from the northeast, significant beach erosion and lakeshore road flooding is likely in Marquette, whos beaches face northeast.
OK, let's set the record straight after you spew your anti-Penn State hatred.
1. IF Penn State had played higher-ranked teams earlier, say Texas or Florida, chances are they wouldn't be 10-2 at this point, and not be playing in the Cap. One Bowl.
2. LSU is NOT a middle of the pack SEC team, they are the SEC's third rank team, behind Fla. and Bama. (out of 12 SEC teams). Capital One Bowl pits the 3rd place Big Ten vs. 3rd place SEC.
3. On a personal note, Penn State deserves their bowl. They don't deserve playing in the Orange Bowl. I think they would be the better draw against Georgia Tech, with Iowa being without their qback, but that's not how it works.
I just don't understand your jealousy for Penn State. I know your college team is a nightmare, but don't take it out on Penn State. Don't be a hater, just jump on the bandwagon!
Edit: I honestly did not read PP's message before writing this
And Bliz you better not be over hyping the next few weeks, I just can't handle it!
Ugh, I saw that. Personally I think the change should be for areas in the Great Plains and not for the Northeast, but o well. By the way I will send you those links this evening.
i agree. it's tough to get 1" hail in this part of the country. thanks for the links>
Second, it is annoying to listen to the fans think that PU is better. Joe used to play a great schedule and that is why he used to be so respected. Not anymore. Had they played better quality teams they might have made better showings against the Big Ten's 2 top teams, but instead they got blown out.
So as you can see it is nothing to do with jealousy. Like I said i USED to be a huge PU fan. Yes, my college team sucked this year because they played mostly underclassman. They at least played teams Cal and Rutgers and Middle Tennessee for their out of conference, all bowl teams. Can't say the same for PU.
I always see you stay on the conservative side like the NWS. In the 2 years you have been on this site this is the first time I have seen you actually say something like this.
Hahaha... Watch it blow up in my face, lol.
j/k Blizz
school wednesday pal, do your homework haha
You will be under an advisory by sometime tomorrow, just watch.
Back to normal or slightly above. It always seems already New Years it gets warm right before the bottom falls out farm show week in January. New blog out by the end of the week.
I also have never seen accuweather hype to the extent they are doing now. I am sure that some of them are actually hyperventilating.
Yea the headlines tonight are literally "Blizzard impacts millions from Colorado to Wisconsin" and "World of Extreme Weather" Hahahahaha.
You live in a state that is ultra passionate about football, from pee-wee's to the pros. Of course the state university has an unbelievable following. You think if you lived in a state like Tennessee or Texas or Nebraska that it's any different? If anything, it's worse in many cases! So yes, when you're out in public you're going to hear fans express joy, concern, or anger about their team. I appreciate that you were a fan and now you're not, but I've been a fan for probably 35 years, and quite frankly, the team hasn't changed. They are almost always nationally ranked, they run a relatively clean program, and they graduate their players (btw, #1 in the nation in Div.1 in that category), and their football program has helped the university grow to a top academic institution in the nation. So you can choose to refer to Penn State as "PU" in a derogatory way, but I just think there is more to you not liking Penn State than a few people cheering for their team or the team playing a few soft teams on their schedule.
As far as JoePa is concerned, I don't think he is any less respected now than he was. If anything, I feel he is more respected, and every ex-coach or current coach you hear on TV or read in papers/magazine articles have expressed that.
FWIW, Texas played UT-ElPaso and Wyoming; Alabama played Fla.International, Chattanooga, and North Texas; Florida played Troy and Charleston Southern; need I go on? They all have a few softies on their schedule, and the softies all have a couple of big name schools on theirs.
.SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/...
THE NOSE OF THE SURFACE HIGH WILL BE INTO THE WESTERN ATLANTIC AND
EXTEND NORTHWEST TO THE GREAT LAKES. A HEALTHY SOUTHWEST WIND ALOFT
WILL BRING OVERRUNNING PRECIPITATION TO THE REGION WITH PLENTY OF
MOISTURE TAPING INTO THIS SYSTEM BEFORE IT IS ALL SAID AND DONE.
BUT THE DONE PART SHOULD BE RAIN HEAVY AT TIMES AND NOT SNOW HEAVY
AT TIMES FOR US. WE HAVE BEEN DEALING WITH THE SPLIT FLOWS AND
THIS IS ANOTHER CASE AS THE SOUTHERN BRANCH REACHES DEEP INTO THE
MOISTURE SOURCE OF THE GULF OF MEXICO AND CARRIES IT NORTHEAST INTO
OUR WESTERN ZONES BEFORE DARK ON TUESDAY. THE EARLIEST HYDROMETERS
SHOULD BE IN THE FORM OF RAIN CREEPING UP FROM SOUTHERN DELAWARE
AND OUR MARYLAND EASTERN SHORE ZONE OF TALBOT. THAT WOULD BE
AROUND 4PM TUESDAY. THEN THE OVERRUNNING RUNS WILD AND QUICKLY
OVERSPREAD THE ENTIRE FORECAST AREA BY SEVEN. THIS WILL BE JUST
PAST THE EVENING RUSH HOUR BUT THERE WILL PROBABLY BE SOME
PRECIPITATION IN A LITTLE EARLIER AND THAT COULD BE A MINOR MESS
FOR COMMUTERS. WHILE TEMPERATURES WILL BE IN THE LOW TO MID 30S IN
THE NORTHWEST SUBURBS, THE WILL BE IN THE MID 30S ACROSS THE
DELAWARE AND SOUTH WHICH LOOKS LIKE AN ALL RAIN EVENT. HOWEVER,
YOU DON`T WANT TO GET TOO CUTE WITH DEMARCATION LINES THIS FAR OUT
SO BE PREPARED INTO THE EVENT THE TEMPERATURES STUMBLE ON
THEIR WAY TO SAFELY REACHING THE MID TO UPPER 30S. AS WE GET INTO
THE OVERNIGHT HOURS, THE LINE BETWEEN ALL LIQUID AND MIXED RAIN
SNOW AND SLEET WILL VERY SLOWLY LIFT NORTHWEST AWAY FROM THE
DELAWARE VALLEY AS THE WARM AIR BEGINS TO SEEP INTO THE LOWER
LEVELS. ONE CONCERN WILL BE THE AMOUNT OF FREEZING RAIN THAT COULD
OCCUR IF THE COLD AIR LINGER WITH THE STRONG SOUTHEAST WARM JET. HOWEVER
WE ARE LOOKING AT ABOUT A TEN TO TWELVE HOUR OF MIXED PRECIPITATION
AND IT WILL BE A MESS IN THE NORTHWESTERN SUBURBS UP THROUGH THE
POCONOS WHERE ALL SNOW WILL FALL.
THE MODELS ARE CONSISTENT WITH THE SECONDARY SMALL LOW FORMING
OVER THE CHESAPEAKE BAY BY WEDNESDAY 12Z. THE RAPID WARM-UP WITH
THE 80H 60 KT JET WILL HOPEFULLY SCOUR OUT THE COLD AIR IN ALL BUT
THE MOST STUBBORN VALLEYS OVER LEIGH AND POCONOS TO PREVENT A
DANGEROUS EPISODE OF FREEZING RAIN.
TEMPERATURES THROUGH THIS PERIOD ARE NOT HARSH, BUT FOLLOWING THE
SYSTEMS PUSH INTO THE ATLANTIC AND A COLD RETURN FLOW...TEMPERATURES
REALLY BOTTOM OUT BUT THAT WILL BE COVERED IN OUR LONG TERM
SECTION.
&&
.LONG TERM /WEDNESDAY THROUGH MONDAY/...
HIGH PRESSURE WILL CONTINUE TO BUILD IN FROM THE WEST THURSDAY NIGHT
AND WILL LAST THROUGH THE EARLY PART OF THE WEEKEND.
ANOTHER SYSTEM LOOKS TO DEVELOP OFF OF THE CAROLINA COAST LATE IN
THE WEEK AND MOVE NORTHEASTWARD ON SATURDAY. PRECIPITATION CHANCES
LOOK GREATEST IN THE SOUTHERN AND COASTAL AREAS AS THE SYSTEM
REMAINS OFFSHORE. WITH TEMPERATURES FALLING INTO THE 20S AND 30S
ON SATURDAY NIGHT/SUNDAY MORNING, PRECIPITATION MAY BEGIN AS SNOW
BEFORE MIXING WITH RAIN ON SUNDAY MORNING. ALSO, A LOW WELL OFF TO
OUR NORTH MAY DRAG A COLD FRONT ACROSS THE REGION ON SUNDAY. THE
FRONT DOES NOT LOOK TO HAVE AS MUCH OF AN IMPACT AS THE COASTAL
LOW AT THIS TIME BUT UNCERTAINTY WITHIN THIS PERIOD REMAINS HIGH.
A RETURN TO HIGH PRESSURE IS THEN EXPECTED FOR THE START OF THE
WEEK.
Here's how bad the hype is... My mom, who never, ever knows what's happening with the weather (unless she happens to open the door and get hit in the face with it) came down for dinner tonight. She opened the door, walked in and said, "There's going to be a terrible storm."
Where? says me. I don't know, says she. But there's going to be lots of snow and ice and terrible cold and the whole country is going to be affected.
I haven't a CLUE where she picked it up - off tv somewhere, I'm sure. But be prepared. If mama is talking about it, I'm looking for my mittens! LOL
Why are we talking about football when there is snow on the way? You had April/May-October/November to talk about this non-snow trash. On a related aside: PSU sets up easy knockdown teams for most of the season, plays their required conference games, and in all ways possible "sticks it" to their students. And on top of that, JoePa is old and doesn't use a headset. Big fat hairy deal.
Just for kicks, how do they do that?? I can't wait for your response!
btw - big whoop that they graduate football players. wow.
I was a PU fan back in the 70's, 80's and 90's. you may think Joe is respected but the program isn't. go back to all season long and every ex-coach you hear on tv doesn't give PU any respect because of the soft schedule. I couldn't tell you how many times I heard it on tv this season.
oh yes, somewhere in my subconscience there is something else. i will have to search it sometime or maybe go see a Dr. and he can tell me what it is. hahaha
SSA - i just think it is hilarious the PU football fanatics.
All top 25 teams have respect when they play an inferior team.
I probably watch 12-15 hours of football every weekend, and I have never heard an ex- or current coach say anything negative about paterno. If you have, please post the link.
It's not important if a school doesn't graduate its players? Isn't that what colleges are supposed to do??
Does this storm suck that much that instead of discussing it, we're talking about PSU Football? To quote the d-bags from ESPN, "C'mon Maaaaaaan!"
Blizz, what's the word m'man?
It appears this weekend storm is still a threat with the 0z ECMWF favoring locations in northern Maryland and much of Pennsylvania with a light to moderate snow accumulation. GFS is similar with just a bit lighter QPF. Maybe we can build a snowpack as the snow Tuesday night may stick around as a dry slot could prevent some of the rainfall on Wednesday. And after Wednesday highs stay below freezing. Then we get the Saturday late day snow so maybe just maybe? Do not get your hopes up though, lol.
Models have trended a bit warmer with this current Tuesday evening event mainly courtesy of the strong southwesterlies aloft. Note the high wind watch out in the Ohio Valley through northwestern Pennsylvania.
MONTOUR-NORTHUMBERLAND-COLUMBIA-DAUPHIN-SCHUYLKILL-
612 AM EST TUE DEC 8 2009
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO
11 AM EST WEDNESDAY...
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A WINTER
WEATHER ADVISORY FOR A MIXTURE OF SNOW...SLEET AND FREEZING RAIN...WHICH
IS IN EFFECT FROM 7 PM THIS EVENING TO 11 AM EST WEDNESDAY.
DEVELOPING LOW PRESSURE OVER THE SOUTHERN PLAINS WILL TRACK
NORTHEAST INTO THE GREAT LAKES TONIGHT AND WEDNESDAY. THIS SYSTEM
WILL SPREAD SNOW INTO THE AREA AFTER DARK THIS EVENING. 2 TO 4
INCHES OF SNOW COULD ACCUMULATE BEFORE PRECIPITATION CHANGES TO
SLEET OR FREEZING RAIN LATE TONIGHT. PRECIPITATION WILL LIKELY
CHANGE TO ALL RAIN BEFORE TAPERING OFF BY LATE MORNING ON
WEDNESDAY.
i don't think it should be up to the schools to graduate students. it should be an individual that wants to graduate. now of course there should be guidelines and minimum GPA's. i wasn't a student athlete just a student and the college could careless whether I graduated or not and that is how it should be. they aren't babysitters.
Should be fun!
Yeah, PP, I was thinking the same thing. But it looks like the weather won't really move in until later tonight after it cools off a bit. It's the warming up tomorrow that makes me want to call bust for sure though. I mean, whatever happens overnight will be gone with a high of 40 tomorrow afternoon and 8-10 hours of rain tomorrow morning. No time to enjoy the snow that may fall later tonight, if it even falls at all.
I expect a pretty quick change over after 2 or 3 inches.
THE SYSTEM SCOOTING UP THE ATLANTIC SEABOARD MID PERIOD IS NOT IN A FAVORABLE SYNOPTIC LOCATION TO BE MUCH OF A RAIN OR SNOW THREAT FOR THE MID ATLANTIC OR NORTHEAST...BUT THE
MODELS...ECMWF INCLUDED...HAVE CHOKED A COUPLE TIMES THIS SEASON WITH UNDERPLAYING SUCH DEVELOPMENT. PERHAPS THE BIGGER WORRY IS
WHAT BECOMES OF THE WAVE CROSSING THE GULF STATES AT THE END OF THE PERIOD. THIS SYSTEM DOES HAVE THE SYNOPTIC EARMARKINGS TO BECOME A SIGNIFICANT WINTER STORM FOR PARTS OF THE EAST LATE DAY 7 THROUGH DAY 8. THE EXTENDED GUIDANCE HAS BEEN TARGETING DECEMBER
16 FOR SOME TIME NOW AS A MAJOR CYCLONIC EVENT FOR THE EAST...SO THERE MUST BE A FAIRLY ROBUST SIGNAL.
Rasp. One of things you have to remember about Penn State in your area is the Hershey Medical Center. All Penn State fans and they even have the Life Lion.
The temp is already 43F here. The storm will need to bring in some cold air for my area to see any accumulating snow. I hope its not ice as well. Not with PennDot running the roads. No thanks. Now if I was in MD or NY thats a different story.
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