Winter is going to hit us hard this week. The image below will explain why:
The Red line that is extending its way into the Alabama and Mississippi is the 540 pressure line of the upper atmosphere. This line is equivalent to roughly 32 degrees at the surface. It is generally pretty impressive to have that line extend that far south, but what is more amazing is the 510 pressure line. This line is usually associated with extremely cold temperatures that can easily dip below freezing with wind chills in the negative double digits. That 510 line of air usually hangs around in northern Canada. If it ever rears its ugly head it would usually affect only the states of North Dakota, South Dakota, Minnesota, and Wisconsin. This extremely cold air looks like it will be sticking around for the next couple of days. The brunt of that air should exit the region by January 25th, which is when we may see our first shot of precipitation for much of the Midwest pending any lake effect snow that may happen.
I know it is the middle of winter and everyone is most certainly prepared but here are some essential items if you need to trek around campus or walk for your car to the office.
I hope everyone has a nice week. Stay warm out there the extreme cold will only last a matter of days!
Showing posts with label Alabama. Show all posts
Showing posts with label Alabama. Show all posts
Sunday, January 20, 2013
Monday, December 24, 2012
Christmas 2012 Storm on the Horizon
Merry Christmas Eve, folks! As most of you have heard in the chaos of shopping and wrapping presents, a significant severe weather and snow event threatens a large portion of the U.S. this week. This storm will have major impacts with heavy snowfall amounts, strong winds, and even a potentially major tornado outbreak in the Gulf Coast states on Christmas Day.
We'll first begin discussing the formation of this potent weather system. An impressive upper-level trough is currently working its way across the Rockies, deepening as it progresses over the leeward side of the mountains. As this cold air moves southward and contacts warm Gulf air early Tuesday morning, significant amount of energy is present for the low pressure to intensify near the Mexico/TX border. Also, the presence of ample moisture will enable heavy snowfall and the tornado/severe weather threat.
The number one concern from this system is the severe storms to occur in
the Gulf states on Tuesday and into Wednesday morning. The Storm
Prediction Center's convective outlook for Christmas Day shows a
moderate risk area from central Louisiana extending eastward into
west-central Alabama. Extremely strong wind shear and considerable
instability in the warm sector of the low pressure system will be the
main drive behind the potential for isolated supercells supportive of
long-track tornadoes. Along with supercells capable of tornadoes,
possible bowing storms will also lead to very damaging winds. Based on
simulated radar reflectivities, the severe storms appear to begin in the
morning hours of Tuesday and continue through the evening. Residents of these areas should keep informed throughout the day on any severe weather watches and warnings issued by the National Weather Service.
On the opposite end of the weather spectrum, snowfall will also be a major concern for those traveling in the Midwest and Northeast this holiday. Excessive snowfall potential has already led to the issuance of winter storm watches and warnings extending from Oklahoma northeastward towards northwest Ohio and southern Michigan. Snow will likely start falling in Oklahoma early Christmas morning, and will track northeastward into Thursday. The 12Z NAM output shows snowfall depths up to 16" in some areas of the storm track. However, these snowfall amounts are likely overestimated. With the energy and moisture extracted from the Gulf by the highly-probable severe storms in the South, snowfall amounts should remain lower than what is currently forecasted by many models. Totals for much of the areas within the snow swath should remain below 12", with higher amounts possible in the higher elevations of the Appalachians. At any rate, people should exercise extreme caution if traveling on the roads on Tuesday through Thursday. At the airport, expect many delayed and cancelled flights due to this system. Also, be sure to stay tuned to any watches or warnings issued for your area by the National Weather Service.
As with any weather event, follow Stratustatus on Twitter and Facebook below for continuous updates throughout this significant Christmas storm. Happy holidays, and stay safe out there!
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| 12Z NAM run for 12Z December 25, 2012 courtesy of PSU Ewall |
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| Day 2 SPC Convective Outlook Categories and Probabilities |
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| 12/24 12Z NAM Snow Depths courtesy of WeatherBell |
As with any weather event, follow Stratustatus on Twitter and Facebook below for continuous updates throughout this significant Christmas storm. Happy holidays, and stay safe out there!
Thursday, December 20, 2012
Winter Storm Update: 2:15 PM EST Dec. 20, 2012
The first significant winter weather system for the Midwest is currently underway. This event has prompted blizzard and winter storm warnings in states such as Oklahoma, Nebraska, Iowa, Illinois, and Wisconsin. Along with white-out conditions, areas in the South have seen severe weather including damaging winds and tornadoes.
Current MSL pressure analysis from the SPC Mesoanalysis shows the deepening low pressure of 984 hPa located over north-central Illinois progressing northwestward. The black lines (known as isobars, or lines of equal pressure) along the western side of the storm are seen very close to one another; this indicates winds at the surface are beginning to strengthen. Wind speeds of 53 mph have been reported at the Davenport, IA airport. Of course, cold air associated with these gusty winds has allowed for heavy snowfall to occur, prompting blizzard conditions in Iowa and Wisconsin (MCD 2193).
Heavy snowfall will continue to occur for the Wisconsin area throughout the evening. Rainfall that is currently occurring the Chicago metro will gradually switch over to frozen precipitation in the next few hours, creating an extremely hazardous rush hour commute. Snowfall in Wisconsin and northwest IL could exceed 12" in some areas. As for areas south of the Chicago area, snowfall amounts should be limited to the 2-4" range. Lake-enhanced snowfall is likely to occur in the early morning hours of Friday, 12/21 in northern Indiana and western Michigan.
Here's a video looking at the blizzard conditions as of 10 AM this morning: http://youtu.be/nAtQc-LQV50
Continue to follow Stratustatus on our media outlets below for updates throughout the afternoon and evening on this major winter event:
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Facebook
Current MSL pressure analysis from the SPC Mesoanalysis shows the deepening low pressure of 984 hPa located over north-central Illinois progressing northwestward. The black lines (known as isobars, or lines of equal pressure) along the western side of the storm are seen very close to one another; this indicates winds at the surface are beginning to strengthen. Wind speeds of 53 mph have been reported at the Davenport, IA airport. Of course, cold air associated with these gusty winds has allowed for heavy snowfall to occur, prompting blizzard conditions in Iowa and Wisconsin (MCD 2193).Heavy snowfall will continue to occur for the Wisconsin area throughout the evening. Rainfall that is currently occurring the Chicago metro will gradually switch over to frozen precipitation in the next few hours, creating an extremely hazardous rush hour commute. Snowfall in Wisconsin and northwest IL could exceed 12" in some areas. As for areas south of the Chicago area, snowfall amounts should be limited to the 2-4" range. Lake-enhanced snowfall is likely to occur in the early morning hours of Friday, 12/21 in northern Indiana and western Michigan.
Here's a video looking at the blizzard conditions as of 10 AM this morning: http://youtu.be/nAtQc-LQV50
Continue to follow Stratustatus on our media outlets below for updates throughout the afternoon and evening on this major winter event:
Sunday, September 9, 2012
Hurricane Preparedness
September
10th marks peak season for hurricane development in the Atlantic Ocean and Gulf
of Mexico. Many people living along or near the East and Gulf Coasts of the United
States should really consider creating a disaster plan for their families and
themselves if you already don’t have one!
The
first step for hurricane preparations would be to plan different routes if you
and your family had to be evacuated for an approaching hurricane or tropical
storm. Deciding to evacuate can be a difficult decision and typically has to be
made within a short time span. Traffic pile-ups often sway an individual’s
decision on whether to evacuate or not, which is why planning a route is
beneficial to avoid horrible traffic jams. Also, planning a safe destination,
whether in a hotel or other family member’s home, is vital for a successful
evacuation. This ensures you and your family’s safety when you finally arrive
at the preplanned location.
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Figure 1 www.nytimes.com (Damage Hurricane Ike)
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Creating
a survival kit is another must if you are in a disaster (hurricane or not!)
prone area. During severe weather events, many homes and businesses lose their
power, which means one has to plan their food choices and water supply accordingly.
The American Red Cross’s website offers lists of various supplies that are
necessary to include in you survival kit. The first list includes the most
basic supplies that are highly recommended, and also include secondary lists
that would be beneficial to you and your family’s needs. It is highly suggested
that you check out the American Red Cross’ website and create a survival kit
just in case of an event of a disaster (or hurricane).
Website for the American Red Cross: http://www.redcross.org/prepare/location/home-family
Taking
inventory of your household items is another suggestion you might want to
consider while preparing for a hurricane/tropical storm for insurance reasons.
By doing this, you are providing pictures of your home and personal belongings
before the disaster has occurred. After the storm has passed, you can take
pictures of your items and home after the storm, and present them to your insurance
company. This helps you while you inventory the aftermath, and shows the
insurance companies the actual damages from the storm.
One
of the last tasks one should remember is covering all your windows or opening
to your home. Hurricane shutters are ideal in this situation, but not many
homes or businesses have access to them. Boarding up windows with wood is an
alternative that could help protect your home as well. Placing sandbags around
your home is another way to provide damage prevention to help block possible
flooding and storm surge.
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Figure 2: Ramanathan | Aug 29, 2012 (Isaac) http://www.ibtimes.com
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Finally
if you are a pet owner, please do not forget your pet(s)! They too need to be
included in your disaster plan because not all hotels are “pet friendly”, and
pets also need necessary supplies, such as water and food.
Hurricanes
and tropical storms are only two disasters out of many that can occur. Every household,
no matter your location, should make plans for disasters. Businesses also
should consider having disaster plans to protect themselves and their faculty.
A disaster can happen at any time, so it is better to be prepared for when it
happens!
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