Interesting Weather Information

Monday, July 28, 2014

Highland County - "Tail-End Charlie" Hook Echo July 27, 2014

Take a look at the following 4 images. What you see in the top image is a wide view of the KILN NEXRAD Radar at 8:43PM EDT 27July2014 (00:43 UTC 28JUL22014). All other images are at the same time.

At the very western edge of the system it narrows to almost a point, but at that western edge you see a hook.

The second image is the hook enlarged.

The third image is a 3D volume rendering using GR Level2 Analyst, in my opinion the finest radar software tool out there.

The fourth image is an annotated version of the third image.

What you see in the volume rendering is the rotating updraft above the hook.  There is no doubt in my mind - and this is being written before a damage survey by NWS meteorologists - that this was a small, probably EF0 tornado.

In addition it is what, in storm geek slang, we call a "Tail-End Charlie".

The term was first used in the UK during  WWII to refer to the last aircraft in a formation or to the tail gunner in an aircraft.

Rarely you will hear the term "Tail-End Charlie" refer to a cluster of thunderstorms behind a front.

The most likely meaning, if you overhear storm geeks like me chattering about storms, is the trailing edge of a line of thunderstorms.

The orientation can be north-to-south, east to west but is most frequently northeast to southwest. In this case it is east-northeast to west-southwest.

The shape fans out (gets wider) down wind because of the wind blowing out of the exit region of an upper level disturbance.

Because of the location at the trailing tip of the thunderstorm line, flow into the updraft is imparted with a large amount of rotation and I always closely watch the "Tail-End Charlie" for small, weak tornadoes.

KILN NEXRAD 8:43PM EDT 27JUL2014 (00:43 UTC 28JUL2014)

KILN NEXRAD 8:43PM EDT 27JUL2014 (00:43 UTC 28JUL2014)

Echo that became the hook
Time 00:28:58
Lat: 39.246487  Lon: -83.755119

Center of Hook (red spot in hook above)
Time: 00:43:14
Lat: 39.175713  Lon: -83.634094

Time Span: 14 min 16 sec (.2378 hours)
Distance: 13.06 km (7.052 nmiles) - this is NOT the distance the tornado was on the ground.
Storm Speed: 29.66 kts (54.92 km per hr)
Bearing: 127.067 deg.(from 307.067 deg.)

Friday, July 4, 2014

Global Cooling? Not A Chance! It Is Just The Opposite.

Global warming has not paused or slowed it continues in full force and is still accelerating.

That's right it's like the silent movie days. The piano player is playing frantically, the will be hero is racing to reach the locomotive engine, running atop the box cars, leaping from one to the next trying to reach the engine and ease the throttle back and apply the brakes before the entire train plunges in the abyss no longer spanned by the bridge.

In the rapid fire frenetic world of Global Warming Denialism  (GWD for short) you may have encountered so much disinformation that you want to shut down and walk away from the entire issue because you just do not know what to believe.

It crucial that you do not walk away and you understand the truth.

First two definitions. A Global Warming Skeptic is a person who does good science and is not convinced that Earth is warming and/or that humans are driving the heat energy accumulation in the natural systems that make up our planet.

A Global Warming Denier is a person who uses false logic, incomplete information, contorted physical principles, modified data and graphics and denies global warming in whole or in part. A denier may have monetary gain in mind when crafting her/his argument.

Skeptics are few in number. Deniers  are plentiful.

There are no (i.e. zero) arguments presented by deniers that can pass the litmus test as good science.

Deniers are inconvenient to scientists in that their often simple arguments have appeal and seem to make sense.

Here are a few examples:

Denier Statement: Lake Superior had record ice cover during the winter of 2013-2014. Earth must be cooling.

My Reply: It is "global" warming and not just about the Lake Superior region. There are fluctuations and temporary regional cooling events. The GLOBE is still accumulating heat and at an accelerating rate.

Denier Statement: Warming stopped in the late 1990s.

My Reply: Completely false. The rate of warming of surface temperatures has slowed but the average global temperature is still on the rise.

In Addition: There is more to our planet than surface temperatures. there is the middle and upper atmosphere, the cryosphere (ice) and the ocean where more than 90% of the thermal energy is accumulating.

Denier Statement: Ice in Antarctica is increasing.

My Reply: This statement is partially correct but incomplete and misleading in three important ways:

Deception #1: Sea ice around the Antarctic continent has been increasing since 1979. But sea ice melts every southern summer so ice is not accumulating.

Deception #2: It is plenty cold during Antarctic winters to support even more floating sea ice. Sea ice is NOT increasing because it is colder, which is what deniers want you to think. Sea ice is increasing because winds are stronger, pushing sea ice in specific directions and exposing more water to cold winter Antarctic winds. Sea ice insulates water below it and greatly slows or stops freezing at the bottom edge of the ice. When winds open up expanses of the Southern Ocean by moving existing ice more water is frozen.

Deception #3: Sea ice is only 1/3 of the antarctic ice story. The other two parts are the ice of the high ice plateau of East Antarctica and the ice of West Antarctica. The high ice plateau is either gaining ice slightly or in balance. There is no definite trend there. In West Antarctica the ice is melting at a catastrophic rate and ice losses there exceed any gains elsewhere in or around the continent.

The Real Story:

Globally 2014 has been a  warm year.

Here are graphs from NOAA. They depict:


for January through August 2014.

Please note the words "average" and especially  "global". An anomaly is the difference between a monthly average temperature and the long-term average. 

In this case the base is the 20th Century average.

January 2014
4th Warmest January on Record (Land + Ocean)
4th Warmest January on Record (Land only)
7th Warmest January on Record (Ocean only)

February 2014
21st Warmest February on Record - Tied with 2001 (Land + Ocean)
44th Warmest February on Record (Land only)
7th Warmest February on Record (Ocean only)

March 2014
4th Warmest March on Record (Land + Ocean)
5th Warmest March on Record (Land only)
7th Warmest March on Record (Ocean only)

April 2014
Tied with 2010 for Warmest April on Record  (Land + Ocean)
3rd Warmest April on Record (Land only)
6th Warmest April on Record (Ocean only)

May 2014
Warmest May on Record  (Land + Ocean)
4th Warmest May on Record (Land only)
2nd Warmest May on Record (Ocean only)

June 2014
Warmest June on Record  (Land + Ocean)
7th Warmest June on Record (Land only)
Warmest June on Record and Warmest Month on Record (Ocean only)

July 2014
4th Warmest July on Record  (Land + Ocean)
10th Warmest July on Record (Land only)
Warmest July on Record - tied with 2009  (Ocean only)

August 2014
Warmest August on Record  (Land + Ocean)
2nd Warmest August on Record (Land only)
Warmest August on Record, Warmest Month on Record - beats June 2014  (Ocean only)