WORLD WEATHER THREAD

Weather warning for my area:

WIND CHILL WARNING REMAINS IN EFFECT FROM 6 PM SUNDAY TO NOON CST TUESDAY...

* TIMING... WIND CHILLS OF 20 TO 25 DEGREES BELOW ZERO ARE EXPECTED DURING THE DAY SUNDAY... THEN DROPPING TO 45 TO 55 BELOW EARLY MONDAY MORNING AND AGAIN TUESDAY MORNING.

* IMPACTS... WIND CHILLS AT THIS LEVEL WILL CAUSE FROST BITE ON EXPOSED SKIN IN A SHORT PERIOD OF TIME. HYPOTHERMIA OR DEATH ARE POSSIBLE IF PRECAUTIONS ARE NOT TAKEN.

Thinking of going for a stroll just wearing Union Jack boxers and my stiff upper lip :)
 
Texas is colder than Alaska

Alaska is being globally warmed.

Anchorage Alaska: 31 F

Dallas Texas: 15 F

temps.jpg
 
Well, its that time of year again and tornado season is upon the USA. Its been a pretty uneventful season so far with very little happening, but today it looks like that could change.

The risk across south east OK and south Arkansas is significant, with isolated cells firing up around the TX/OK/AS border.

A particularly strong supercell is forming near Hugo TX and radar is already indicating strong rotation.


http://www.spc.noaa.gov/products/outlook/day1otlk.html
 
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Confirmed tornado, possibly a large wedge heading towards Yazoo City right as we speak. Chasers streaming from here live:

http://tvnweather.com/live

I believe MIDSCAR's stream are on it right now. This could be devastating for a place that got practically wiped off the map a few years ago by a monster tornado. :(

Large hook on radar showing strong low level rotation.

Yazoo28-04-14_zpsc5c67a78.png
 
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Seems like Tupelo got hit pretty badly and supercells still proceeding through MS into north AL.

http://www.weather.com/news/tornado-central/mississippi-tornado-20140428

Just about as clear cut a textbook supercell with a HUGE hook echo in MS. I'd be very surprised if there isn't a tornado associated with this:

Philadelphia28-04-14_zps9025d13a.png


An incredibly large signature there.

Confirmed tornado on that one now. It really is as classic as they come, akin to the one that struck Moore last year. Looks like it will skip above Philadelphia and through a generally rural area. But that really is a tremendous signal.
 
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Definate tornado, debris ball on the radar which means that it is likely picking up trees in a heavily wooded area. Large wedge tornado.

Philadelphia28-04-141_zpsf3235331.png


Christ alive, I'm glad I don't live in that area of the USA.
 
starksville28-04-14_zpsfe6b3ea5.png


MIDSCAR again. Extremely low wallcloud.

Live weather channel stream:

http://www.weather.com/news/tornado-central/tornado-outbreak-live-updates-severe-weather-20140427


Really hard to get decent video stream as these things are 100% high precip supercells. Very difficult to spot tornados as they are largely rain wrapped. This helps sometimes to extinguish tornados though, as the rear flank downdraft cuts off the inflow in the slot as it sweeps eastwards to the south of the storms.
 
It was essentially aided by another storm outin the Atlantic just east of NY state that was just sitting there stationary. This, combined with the usual spring air flow movements of air from the jet stream with the warm moist air from the gulf created these very slow moving storm systems in the south of the USA.

Numerous tornados spawned yesterday and well into the nighttime too. Its not too often you get quite so many storms in the deep south like this, most seasons they stay around their "traditional" locations, OK-AS-KS-TX etc, but occasionally they move south into AB and LA, as seen a few years ago with the Tuscaloosa EF5.
 
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