Dr. Jeff Masters' WunderBlog

From the Lee Side: Penn State's Lee Grenci now a featured wunderblogger
Posted by: Dr. Jeff Masters, 6:24 PM GMT on December 12, 2012 +36
"From the Lee Side" is the blog of wunderground's newest featured blogger--Lee Grenci. Lee put up his first post today, an educational piece on "Arctic Air Masses." He did an earlier guest post in Angela's blog, "The science of Sandy's transition", on whether or not Sandy was a hurricane at landfall (it wasn't.) Lee resides in Pennsylvania, and just retired as senior lecturer in Meteorology at Penn State University, where he was the lead faculty member for their online certificate in weather forecasting. I've been enjoying Lee's writings for many years in Weatherwise magazine, where he is a frequent contributor. Welcome, Lee!

While I'm on the subject of featured bloggers, I want to draw attention to the latest post by TWC's Stu Ostro, "Reflections on a surreal superstorm and the 2012 hurricane season". He discusses NHC's decision not to issue Hurricane Warnings for Sandy, as well as how climate change may have influenced the storm. TWC's Bryan Norcross has also posted his take on NHC's decision not to post hurricane warnings for Sandy.

Jeff Masters
Categories: Winter Weather
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351. LargoFl 2:24 PM GMT on December 13, 2012    
after that 121212 concert last night im Comfortably Numb lol...the who, the stones,and so many others..all to benefit the storm relief agencies where sandy devastated the northeast..had tears in my eyes seeing the massive destruction..places i used to go to as a youngster..gone..washed away..whole neighborhoods..geez..those folks up there just arent used to the sheer size and power of a storm like that..we along the gulf coastline know how to prepare..they dont, most didnt evacuate..now homeless..ALOT still without power in that cold weather up there..yeah tears in my eyes last night and im so glad..the rock stars came out to help..that concert was viewed all over the world..since the USA always helps others in need..now..the USA needs help and i sure hope..the world responded last night....
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352. trHUrrIXC5MMX 2:25 PM GMT on December 13, 2012    
Hi guys...I like that storm:con thing
Member Since: April 23, 2011 Posts: 33 Comments: 7936
353. LargoFl 2:26 PM GMT on December 13, 2012    
.NOW...

A COLD FRONT MOVED THROUGH CENTRAL FLORIDA OVERNIGHT AND WAS LOCATED
SOUTH OF LAKE OKEECHOBEE. LOW CLOUDS ARE EXPECTED TO LINGER THROUGH
EARLY AFTERNOON THEN BEGIN A SLOW CLEARING TREND NORTH TO SOUTH. A
DRIER AND COOLER AIR MASS ASSOCIATED WITH HIGH PRESSURE BUILDING INTO
FLORIDA AND CENTRAL FLORIDA DURING THE DAY WILL RESULT IN MORE
SEASONABLE TEMPERATURES FOR THIS TIME OF THE YEAR WITH HIGHS EXPECTED
TO BE IN THE UPPER 60S AND LOW 70S.

&&
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354. washingtonian115 2:27 PM GMT on December 13, 2012    
The weather is boring here.It is currently in the upper 30's with lots of sunshine.I'm talking about the sunshine that'll blind you and send you off the side of the road.
Member Since: August 14, 2010 Posts: 5 Comments: 10673
355. trHUrrIXC5MMX 2:28 PM GMT on December 13, 2012    
A Hazardous weather outlook is in effect from Maryland all they way up to Massachusetts for the potential nor'easter...

Who has some model runs about this
Member Since: April 23, 2011 Posts: 33 Comments: 7936
357. RitaEvac 2:33 PM GMT on December 13, 2012    
Temp bottomed out last night around 2:30AM where I'm at on mainland Galveston county, a coastal county. Wind shifted to SE overnight which drove the temperature up some 8 degrees from 2:30AM to 7AM. Don't think it happens well inland for inland counties like it does along the coast.

Was dead calm last night and was perfect for dew/frost to form but apparently the winds came up just enough to dry out whatever dew/frost that had formed or was forming and was absolutely dry on surfaces this AM with a light breeze out of the SE. Seen these situations plenty of times before just like this. High pressure shifts and return flow warms us up overnight.
Member Since: July 14, 2008 Posts: 1 Comments: 8912
359. goosegirl1 2:34 PM GMT on December 13, 2012    
Quoting washingtonian115:
The weather is boring here.It is currently in the upper 30's with lots of sunshine.I'm talking about the sunshine that'll blind you and send you off the side of the road.


You could have had 18 degrees with all that sun. It's cold, but at least we have no wind. I'll keep wishing for your snow to hit DC.
Member Since: December 17, 2009 Posts: 0 Comments: 860
360. goosegirl1 2:34 PM GMT on December 13, 2012    
Quoting trHUrrIXC5MMX:
A Hazardous weather outlook is in effect from Maryland all they way up to Massachusetts for the potential nor'easter...

Who has some model runs about this


Will Washi get her snow from this???
Member Since: December 17, 2009 Posts: 0 Comments: 860
361. washingtonian115 2:34 PM GMT on December 13, 2012    
Well while 12/12/12 was a strange date their was something that did go wrong.Some people's power in Maryland went off when a transformer had blown.Lol but I don't think it had something to do with the conspiracy theory date.They sure did wake up in the cold this morning though.
Member Since: August 14, 2010 Posts: 5 Comments: 10673
362. RitaEvac 2:35 PM GMT on December 13, 2012    
Quoting TomballTXPride:




That's the calm before the storm, Rita.

Our rain is coming...

Someday. LOL







Since your inland, you probably never experienced these situations have you, where the temp rises overnight, because of the high pressure shifting and SE winds pick up
Member Since: July 14, 2008 Posts: 1 Comments: 8912
364. washingtonian115 2:38 PM GMT on December 13, 2012    
Quoting goosegirl1:


You could have had 18 degrees with all that sun. It's cold, but at least we have no wind. I'll keep wishing for your snow to hit DC.
Thanks to that high pressure system over head brining that canadian air down.I'm glad they let us borrow some of the chill as we've been unseasonably mild/warm here.
Member Since: August 14, 2010 Posts: 5 Comments: 10673
365. LargoFl 2:39 PM GMT on December 13, 2012    
Quoting trHUrrIXC5MMX:
A Hazardous weather outlook is in effect from Maryland all they way up to Massachusetts for the potential nor'easter...

Who has some model runs about this
where did you see that warning?
Member Since: August 6, 2011 Posts: 0 Comments: 22426
366. Luisport 2:39 PM GMT on December 13, 2012    
Quoting trHUrrIXC5MMX:
A Hazardous weather outlook is in effect from Maryland all they way up to Massachusetts for the potential nor'easter...

Who has some model runs about this
Ryan Maue

@RyanMaue
ECMWF 00z 7-day forecast for Nor'easter showed 973 mb low off of New England, bent-back front extends over Boston. https://mobile.twitter.com/RyanMaue/status/2791368 37560303616/photo/1
Member Since: October 27, 2012 Posts: 0 Comments: 1322
367. LargoFl 2:40 PM GMT on December 13, 2012    
only warnings i could find for up there was for offshore gales.............SYNOPSIS FOR MID ATLC WATERS...A DEVELOPING LOW PRES CENTER 140
NM SE OF CAPE HATTERAS WILL MOVE E ACROSS THE S WATERS THIS
MORNING...THEN PASS E OF THE AREA THIS AFTERNOON WHILE PULLING A
COLD FRONT SE OF THE WATERS. A HIGH PRES RIDGE WILL BUILD IN
FROM THE NW LATE TODAY...MOVE SE ACROSS THE N PORTION FRI AND
FRI NIGHT...THEN WEAKEN ACROSS THE CENTRAL WATERS FRI NIGHT INTO
EARLY SAT. A WEAK COLD FRONT WILL PASS SE ACROSS THE NRN WATERS
SAT NIGHT AND STALL ACROSS THE CENTRAL WATERS SUN. A WEAK LOW
PRES CENTER MOVES E ALONG THE FRONT SUN NIGHT. STRONGER LOW PRES
WILL THEN MOVE NE OFF THE MID ATLC COAST LATE MON.
$$
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368. ILwthrfan 2:43 PM GMT on December 13, 2012    
Quoting AussieStorm:
HURRICANE WARNING 025 ISSUED FROM RSMC NADI Dec 13/0129 UTC 2012 UTC.

TROPICAL CYCLONE FORECAST TRACK MAP


TROPICAL CYCLONE EVAN CENTRE 975HPA CATEGORY 2 WAS LOCATED NEAR 14.0 SOUTH 171.5
WEST AT 130000 UTC.
POSITION FAIR.
REPEAT POSITION 14.0S 171.5W at 130000 UTC.
CYCLONE MOVING EAST AT 6 KNOTS. CYCLONE INTENSIFYING.
EXPECT SUSTAINED WINDS OF 60 KNOTS CLOSE TO THE CENTRE, INCREASING TO 65 KNOTS
BY 140000.
EXPECT SUSTAINED WINDS OVER 47 KNOTS WITHIN 25 NAUTICAL MILES OF CENTRE
EXPECT WINDS OVER 33 KNOTS WITHIN 45 NAUTICAL MILES IN NE QUADRANT
AND WITHIN 40 NAUTICAL MILES IN SE QUADRANT
AND WITHIN 45 NAUTICAL MILES IN SW QUADRANT
AND WITHIN 60 NAUTICAL MILES IN NW QUADRANT

FORECAST POSITION NEAR 13.9S 170.9W AT 131200 UTC
AND NEAR 14.0S 171.2W AT 140000 UTC.

ALL VESSELS WITHIN 300 NAUTICAL MILES OF CENTRE ARE REQUESTED TO SEND REPORTS
EVERY THREE HOURS TO RSMC NADI. VOS REPORTING SHIPS USE NORMAL CHANNELS. OTHER
VESSELS FAX PLUS 679 6720190 OR EMAIL NADITCC AT MET DOT GOV DOT FJ

TROPICAL CYCLONE THREAT TRACK MAP

Tropical Cyclone EVAN Category 2


It appears to me that Evan is north and and a bit west of his forecast points is he not?
Member Since: February 2, 2010 Posts: 0 Comments: 1033
369. LargoFl 2:43 PM GMT on December 13, 2012    
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
336 AM EST THU DEC 13 2012

DEZ003-004-NJZ023-024-140845-
INLAND SUSSEX-DELAWARE BEACHES-CAPE MAY-ATLANTIC COASTAL CAPE MAY-
336 AM EST THU DEC 13 2012

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE AND
SOUTHERN NEW JERSEY.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

COASTAL FLOOD ADVISORY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

MINOR TIDAL FLOODING ALSO IS POSSIBLE WITH THE FRIDAY MORNING
HIGH TIDE CYCLE.

PATCHY DENSE FOG IS POSSIBLE SUNDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

$$
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370. RitaEvac 2:44 PM GMT on December 13, 2012    
In other news


Text messages direct to your contact lens
New technology that will allow information, such as text messages from a mobile phone, to be projected onto a contact lens worn in the human eye has been developed by Belgian researchers.

Ghent University's centre of microsystems technology has developed a spherical curved LCD display which can be embedded in contact lenses and handle projected images using wireless technology.

"Now that we have established the basic technology, we can start working towards real applications, possibly available in only a few years," said Professor Herbert De Smet.

Unlike previous contact lens displays, which are limited to a few small pixels to make up an image, the new technology allows the whole curved surface of the lens to be used.

One application suggested by the researchers is a "one pixel, fully covered contact lens acting as adaptable sunglasses".

"This is not science fiction," said Jelle De Smet, the chief researcher on the project, who believes commercial applications for the lenses will be available within five years.

"This will never replace the cinema screen for films. But for specific applications it may be interesting to show images such as road directions or projecting text messages from our smart phones straight to our eye."

The innovation is the first step towards "fully pixelated contact lens displays" with the same detail as a television screen.

The lenses could also be used for medical purposes, for example to control the light transmission toward the eye's retina in case of a damaged iris.

For cosmetic purposes, the lens could be used the iris of the eye a tuneable colour, allowing the user to change it to suit their mood.

Member Since: July 14, 2008 Posts: 1 Comments: 8912
372. washingtonian115 2:45 PM GMT on December 13, 2012    
According to capital weather game here's the issue with next weeks storm.

"The models are working on a strong storm for next week but still can't decide on the details".Unfortunately it seems(for now) it'll be to warm for snow(highs in the low to mid 40's).That could change..I hope.Even if we have only 2-3 inches that'll still be satisfying enough.
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373. LargoFl 2:45 PM GMT on December 13, 2012    
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374. RitaEvac 2:47 PM GMT on December 13, 2012    
Quoting TomballTXPride:



370 ~ On and on it goes. We are obsessed with this way of life.





We'll watch radar loops and satellite loops thru our eyes, a weather nut's dream
Member Since: July 14, 2008 Posts: 1 Comments: 8912
375. LargoFl 2:48 PM GMT on December 13, 2012    
GFS............
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376. pcola57 2:52 PM GMT on December 13, 2012    
Good Morning All,

Today's WU history report..

"Did you know that...

The coldest December weather to date of the 20th century hit the South today in 1962. Jacksonville, Fla. recorded a low of 12 degrees, while Tampa bottomed out at 35 degrees (both records). Blairsville, Ga. set a state record low for the month of December by recording a low of 9 degrees. "
Member Since: August 13, 2009 Posts: 13 Comments: 3847
377. LargoFl 2:52 PM GMT on December 13, 2012    
post sandy storm surge numbers.........
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378. eddye 2:54 PM GMT on December 13, 2012    
how cold is it going 2 be in orlando for next friday and saturday i see accuweather has like 41 degrees and a high 0f 62 is that true can u ppl tell me wat the models are showing
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379. RitaEvac 2:57 PM GMT on December 13, 2012    
Moisture surge in progress over S TX, clouds racing northward towards San Antonio.
Member Since: July 14, 2008 Posts: 1 Comments: 8912
380. washingtonian115 2:59 PM GMT on December 13, 2012    
In the longer range after the mid-week storm another storm comes flying in.I'm not going to get into the details.Their is still time and issues that need to be sorted out.I just know next week will be interesting.
Member Since: August 14, 2010 Posts: 5 Comments: 10673
381. LargoFl 3:00 PM GMT on December 13, 2012    
Quoting eddye:
how cold is it going 2 be in orlando for next friday and saturday i see accuweather has like 41 degrees and a high 0f 62 is that true can u ppl tell me wat the models are showing
dont know where you saw that here's the 7-day forcast...........
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382. eddye 3:03 PM GMT on December 13, 2012    
largo fl go on accuweather and type in orlando fl for next friday and saturday u got 2 pout extended
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383. nymore 3:06 PM GMT on December 13, 2012    
Quoting RitaEvac:
Temp bottomed out last night around 2:30AM where I'm at on mainland Galveston county, a coastal county. Wind shifted to SE overnight which drove the temperature up some 8 degrees from 2:30AM to 7AM. Don't think it happens well inland for inland counties like it does along the coast.

Was dead calm last night and was perfect for dew/frost to form but apparently the winds came up just enough to dry out whatever dew/frost that had formed or was forming and was absolutely dry on surfaces this AM with a light breeze out of the SE. Seen these situations plenty of times before just like this. High pressure shifts and return flow warms us up overnight.
It happens all over the world. nothing unusual or just a coastal thing.

Example Rankin Inlet Canada will see the temp tonight rise from -33C (-25F) to -25C (-13F) Rankin Inlet is at 62.8N
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384. VR46L 3:12 PM GMT on December 13, 2012    
Quoting trHUrrIXC5MMX:
Hi guys...I like that storm:con thing


So do I.....
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385. ILwthrfan 3:15 PM GMT on December 13, 2012    


Apia, Samoa's largest population district (37,708) is located in the cyclones southern eye wall, which would be equivalent to our Northern Hemisphere's northern eye wall, where stronger storm winds are typically located. To make note this is causing an onshore flow to Apia which does not rise quickly in elevation has you head inland a mile or two.

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386. pcola57 3:27 PM GMT on December 13, 2012    
Webcam from my area..


KM Visible Satellite for Florida


1 KM Visible Satellite for Southern Florida


1 KM Visible Satellite for Southern Texas ..Moisture moving in to the SE Texas area of Moderate drought conditions..


Member Since: August 13, 2009 Posts: 13 Comments: 3847
387. WunderAlertBot (Admin) 3:31 PM GMT on December 13, 2012    
JeffMasters has created a new entry.
388. LostInUtah 3:32 PM GMT on December 13, 2012    
It warmed up last night into the low 50s. We have warnings out for snow here in SE Utah. If so, it will be the first real weathre we've had for some time.
Member Since: November 9, 2012 Posts: 0 Comments: 20
389. kwgirl 3:37 PM GMT on December 13, 2012    
Quoting washingtonian115:
The weather is boring here.It is currently in the upper 30's with lots of sunshine.I'm talking about the sunshine that'll blind you and send you off the side of the road.
Good morning all, Wash. You need to invest in some sunglasses. All that bright sunshine can really do damage to your eyes.
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390. PaleGreen 3:53 PM GMT on December 13, 2012    
Quoting TropicalAnalystwx13:
STORM:CON - Winter Impact Index


I was hoping this would be a gathering of storm junkies. In the vein of Comic-Con and other nerdy conventions! ;-)

I'd go!
Member Since: August 28, 2012 Posts: 0 Comments: 3

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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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