MikJournal January 2016 Prediction

Welcome to a special edition of my MikJournal page. If you are not familiar with the winter page, I will be posting a monthly report for each of the winter months December, January, and February.

In Review

December 2015 was a warm one, into the record books for one of the warmest Decembers on record. Also, it was a wet month, ranking again in the top ten wettest Decembers.

El Nino has had its footprint in a few locations nationwide but did not line up with what one would normally expect from a typical El Nino. But, we are just beginning, right?

Record warmth was also noted across Florida, where below normal temperatures are expected along with above normal precipitation for the winter. It's going to take quite a reversal to offset the anomalous warmth of December.

In fact, other areas of the south that are expecting overall below normal temperatures and above normal precipitation were very balmy, even by their standards. Mobile AL, Baton Rough LA, and Houston TX averaged between 5 and 9 degrees above normal for temperatures and well above normal for precipitation.

Overall, I was pleased with my December prediction, which highlighted no Arctic outbreaks, balmy temperatures, and severe weather chances. However, I think it was a little too warm and wet than even I had anticipated. But, what about going forward into the month of January?

January Prediction

The month of January appears to offer a major dose of reality. After an unusually warm start to the winter, January is offering a plate of at least typical winter fare.

One of my biggest arguments in favor of colder air is the alignment of the teleconnections AO, NAO, EPO, and the PNA. During the month of December, the Keeper of the Cold', the AO, stubbornly refused to dip much below neutral for the entire month; therefore, the coldest air remained locked in place in the Arctic region for the most part though spilling modified Arctic air into the western U.S. However, the eastern part of the United States enjoyed warmth, the typical trough west /ridge east pattern formed by the -PNA teleconnection working in conjunction with a positive AO, NAO, and largely EPO.

Now, the PNA has reversed for the time being. +PNA, or a ridge west/trough east will be working in harmony with the reversal of the negative AO, NAO, and EPO. However, the jury is still out on how the NAO will perform over the longer time frame.

Nevertheless, transport of cold, Arctic air will be available for much of the eastern part of the United States. Any long term cold will depend on how negative the NAO can become. We need a blocking pattern near Greenland to help pave the way for the Siberian Express and keep the cold train well oiled.

Otherwise, I am expecting cold shots of Arctic or modified Arctic air to be interspersed with some nice, seasonal weather with some above average readings. Now, I am not talking about the same kind of air we had in December, so let me be clear about that.

Well, if there is going to be cold air in place, what about snow chances?

The chances are higher that we will be looking at wintry weather for January, especially in comparison with December, right?

A persistent northwest flow will at times cut off the Gulf's moisture supply. But, remember, El Nino is notorious for affecting jet streams, most notably, the southern or subtropical jet. An active southern jet working in harmony with another teleconnection called the Madden Julian Oscillation (MJO) is expected, especially around the middle of the month.

In fact some of the maps I have been studying show a split flow regime where the polar jet and the southern jet are separated initially but then come close enough (or phase) to form a blockbuster storm. I am predicting at least 2 of these systems for the month, primarily near and after the middle of the month.

Right now, I cannot say what the dominant air mass will be when these 2 systems approach our region. You know how it is if you live in Kentucky. It seemingly appears to be a constant battleground between the precipitation types. There are 3 scenarios I foresee if these systems do try and phase the two jet streams.

First, cold air in place, phasing just west: This would not be good. Cold air with overrunning warm air can only spell trouble for the region, ice to rain back to rain/snow and all snow.

Second, mild air in place with low pressure tracking nearby or phasing just north: A rain or rain/snow mix transitioning to all snow after frontal passage.

Third, cold air in place, phase just south: This would result in greatest snow chances for our region but perhaps a bad ice storm for parts of the unprepared south.

Unfortunately, due to El Nino's warm influence and an indecisive NAO, I cannot fully support #3 at this time.

Therefore, I am leaning more toward the second solution, mild air in place with a rain or rain/snow mix transitioning to rain then rapidly changing to all snow after cold air infiltration with some accumulations..

I am not saying that if both systems do evolve, they will be twins of one another thereby producing the same kind of weather for the region. I do expect one system to offer a warmer solution than the other.

Now, if the NAO can stay mostly negative, that could alter this forecast. The second solution above still looks good though, because we do not want a phasing to occur too far south or else our region will mostly miss out on the biggest snows. However, it is more probable for parts of the state (south to southeast) to see significant snowfall than the northern half.

Conclusion:

January's temperatures should range between near normal to below normal, despite what the CPC says about an above normal temperature pattern.

Precipitation will depend on types. Right now, I am leaning toward below normal, no matter what types of precipitation we have. A colder air mass will yield much below normal precipitation while a milder air mass will yield a better result though still below normal.

MS

MikJournal Monday 12/28/15

Just a few days left in this record-setting year of 2015. Right now, I am trying to come up with as many words that start with the letter 'W' to describe the year's 'W'eather.... Let's see.

'W'et
'W'arm
'W'ild
'W'eird
'W'ashout
'W'acky
'W'affle
'W'intry
'W'onderful
'W'ambunctious...Okay, how did he get in here?


www.thecoasterguy.com

Well, anyway, this looks to be a memorable year, with all of the cold and snow we had...mostly late in the season, though. Still, February finished at #7 in the top ten coldest February's on record in Louisville. In fact, while there are no records for this category, February has also been the windiest month of the year, coming in at an average  speed of 9.9 mph. A few of those windy days came when the surface temperatures were already bone-chilling. Here are a few examples...

On Valentine's Day, Louisville had a wind gust of 44 mph when the high temperature was 38 and the low was 12.

On February 18, the high temperature was 24 and the low was 4. There was a recorded wind gust of 36 mph and an average speed of about 15 mph.

The very next day, we only reached 11 degrees while the bottom dropped out at -3 for an overnight low. Still, there was a 25 mph wind gust along with an average speed of 10.4 mph.

On March 5 in Louisville, we had a  top ten record snow depth of 10". March 4th was also the 5th snowiest March day on record at 8.3".

February had its 10th snowiest month on record at 10.9" and March had its 6th snowiest month of March at 11.9". In addition, that amount would prove to be Louisville's 7th heaviest snowfall on record, covering the March 4-5 time frame.

Thanks to that snowy March, the Spring of 2015 went into the record books as the 6th snowiest Spring on record at 11.9".

On the other hand, Louisville looks to finish in the top half of the top ten warmest December's on record, to go along with November's #5 ranking.

The autumn of 2015 finished #6 in the warmest Autumn season on record category.

Believe it or not, despite February's record cold and a ho-hum summer, with only 38 days in the 90's for Louisville, we should still see a top ten finish in the warmest years on record category.

How about wet? Was it wet or was it wet?

In Louisville, we recorded our 4th wettest day on record and the wettest April day ever on April 3 with 5.64".

Louisville also achieved a top ten wettest month in April (#3)  and July (#7). As of this morning, we have moved into the top ten wettest month for December, with more rain projected to come.

We have yet more top ten earners....The Spring season of 2015 came in at #7 wettest on record and the Summer season of 2015 came in at #5.

Also, as of this morning, and not surprisingly, we are at #4 in  the wettest years on record category.

As far as this year in review, at least for now, in the words of Porky Pig, "That's all folks."

MS

MikJournal Holiday Post 12/25/15

Record warmth continues to dominate the eastern part of the U.S.
Temperatures for the month have averaged 10-15 degrees above normal for the upper Great Plains, Midwest, Northeast, and our part of the world.
Snow Nazi says "No snow for you, come back...er, in a few days or so." Okay. So no white Christmas for many of us in eastern North America. But, changes are coming, soon.

Currently, U.S. snow cover is at 37.2%. Despite all of the warmth for the east, there is more snow cover this December 25 than last year at this time when it was 35.5%.

When was the last time over 50% of the country had snow on the ground?

You gotta go back to 2012, yes, the warmest year on record for Louisville and definitely a top ten favorite for others in this great state. Some 51.1% of real estate was covered in white. There were a slew of other years in that general time period of December 25 when over 50% of the country saw white.

2010 - 50.2%
2009 - 63.0%
2008 - 52.7%

Believe it or not, the last time we in Louisville and Lexington saw a white Christmas, with measurable snow on the ground, was 2010. Now, in 2012, we did not have a white Christmas, but it did snow a few days later as we approached the end of the year.

My December Prediction I made during the last week of November included balmy weather and also severe weather chances for the end of the month. The MikJournal January Prediction comes out later around the 29th or 30th. It's looking like a colder month (about time!) but what about snow chances? Find out that along with my thoughts about how the overall winter season could be progressing with El Nino's footprint seemingly everywhere.

MS

MikJournal Case for Top Ten Warmest Year on Record for Louisville 2015

Yes, it has been a wet year, definitely a top ten earner. This December will be among the warmest on record, something a few are beginning to talk about now.

But, I have not heard or read anyone mentioning that this could be a top ten warmest year on record for Louisville. We should not only break into the top ten but may register as high as #5 on the list.

Perhaps it should not surprise you that 2015 could become a top ten inductee for warmest year on record, because 2007, 2010, 2011, and 2012 are among past inductees, 2012 having the distinction of warmest year ever.

But, here's what may surprise you....

#1 - 2012  60 days with temperatures >=90 for the year.
                 10 of those days >=100 degrees

#2 - 2007  67 days >=90 degrees
                   5 days >= 100 degrees

#5 - 2011  56 days >=90 degrees
                   5 days >=100 degrees

#6 - 2010   85 days >=90 degrees
                    4 days >=100 degrees

2015 has recorded only 38 days at or above 90 degrees. Guess how many days were above 100 degrees?

Zilch, nada, the big goose egg.

Yet, my current projection has 2015 beating out the #6 spot held by the year 2010 and will pose a strong challenge for #5 shared by 2011 and 1990.

Currently, the 2015's average temperature ranks #5. However, we still have a week to go. Yet, temperatures are expected to range well above average for December during the short term before attempting to return to slightly elevated values by year's end.

MS

Tornado Watch for Western Kentucky

Storm Prediction Center says two lines of strong to severe storms should impact the shaded areas. The Watch goes through 6pm est.

Currently, there have been a few reports of wind damage near St Louis.

We, who are east of this Watch box, need to pay special attention to this setup of two lines. If, and I do mean if, we are able to develop some instability, the first line could have impacts, possibly related to isolated tornadoes. Otherwise, the first line could just have pockets of heavy rain that may preclude severe weather along the second line.

This looks to be a complicated storm system as far as severe weather chances. Best chances reside west and south of our region of central Kentucky.

Timing the storms' arrival so far is poor. Models slow the whole line now. But a vigorous squall line may speed things along. The earlier that storms can arrive, higher severe weather risks.

Nowcast event underway.

MS

More Records Possible

I cannot remember too many Decembers in my lifetime that has been this warm overall. I am not talking about a day here or there that set a record high. I am not even talking about a regional thing with a few days in record high territory. This has been nearly a month-long event.

Fargo ND - over 13 degrees above average for the month.
International Falls MN - over 15 degrees above average with not a single day below zero yet this month. And they are supposed to be the Icebox Capital of the United States (there is still debates raging over that one).
Sault Ste Marie MI - over 12 degrees above average with just over an inch of snow for the month.
Buffalo NY - almost 11 degrees above average. With barely a flinch, the lake-effect snow machine has basically been shut down eeking out a robust 0.1".

In addition to a top ten wettest years on record, Louisville will be flirting with at least top ten warmest Decembers and a shot at a top ten warmest year on record. Oh forgot to mention, but Louisville will possibly break more local daily records as well before the month is over.

MS

Projection Time: Louisville's Winter Temperatures

Ok. Try and follow me here. The logic and numbers may seem distorted, so you might need a pencil and paper to help. Remember, though, these are just projections, not anything set in stone.

My winter outlook simply says that Louisville and surrounding region would be milder than the previous two winters.

In Louisville, the last two winters of December through February averaged at least 3 degrees below normal. Right now, or as of December 14, Louisville is averaging over 10 degrees above normal.

Today and tomorrow we should see readings at least 10 degrees above normal. Even though below normal temperatures are expected for 2 or 3 days later this week, we're only talking about 3-4, 5 degrees maximum of below normal values. Then, we go right back up from there, averaging more than 5 degrees above normal for a stretch of a few days.

As you can see, I am highlighting more higher 'above normal' readings than 'below normal' readings. In other words, we don't have 10 degrees above normal one day and 10 degrees below normal the next day. But, we might have days of 10 and 12 degrees above normal versus a couple of days of 4 or 5 degrees below normal. The 10 and 12 quite simply overwhelm the 4 or 5  so that the average remains above normal.

Now, for the sake of argument, let's assume that after today and tomorrow with double-digit temperatures above normal, the rest of the month, every day, the high temperature and low temperature met its normal value. What would be the result?

December would still finish 5-6 degrees above normal, not too far from top ten warmest Decembers on record status.

That means January and February would need to average about 8 degrees below normal per month for my outlook to be wrong.

I guess it could still happen, but I am already expecting a concession speech from Old Man Winter already.

MS