Friday, October 26, 2012

Observations on "Sandy"




That's a LOT of dry air.  Sandy is getting her butt kicked right now!

Some statements I have posted on facebook today:

"I'm just noticing that the dry air intrusion is massive right now. I always try to live in the now when it comes to weather and especially forecasting."


"One of my meteorology professors at MSU (Dr. Wax) always had a saying I liked about weather forecasting. "Anything over 3 days is magic." This is not to say you shouldn't attempt long range forecasting (especially if you're using sound reasoning/logic), but be prepared to be humbled a lot. There is still plenty of time to watch Sandy. IMO, we'll know by late Sunday night how bad this storm will be..."


"It's a massive storm, no doubt. Not taking anything away from that. BUT, that's a lot of dry air. I'm just looking at things in the real time:http://www.ssd.noaa.gov/goes/east/tatl/flash-wv.html"


"To be clear, I'm not saying this won't be a strong if not even a historic storm. I've posted several times about that, being realistic about the situation, staying far away from some of the crazy comparisons I've seen. Keep in mind that 950-960 mb would be an exceptional storm, especially when you consider the huge pressure gradient it will generate. However, I'm going to look at things in the real time as I refuse to "wishcast". Trusting model intensity 3+ days out and quoting it as "fact" is a great way to be humbled quickly. I just prefer to actually see things come together and use the real time observations I have before I already crown this as one of the great US storms in recorded history. Time will tell on that, and we still have plenty of time to just watch, be calm, and see things come together. I promise, if "Sandy" starts to explode, I'll point that out..."


"I agree 100% on real time forecasting. Model or what I like to call parameter forecasting/chasing never works out too well. Of course I look at the models like anyone, but I try my best to be realistic, using the overall pattern to forecast instead of model specifics. Especially, on something like exact pressure 3 to 4 days out. When I kept hearing comparisons to the 1938 "Long Island Express" I had to pick my jaw off the floor. I really don't think people realize how rare and how powerful that storm was. Historic is an understatement for that storm!"


"I figured I better post something, as I find myself glued to this storm! lol That's exactly why I said we'll know by Sunday night. Until then, I'm just looking at what's actually going on. Just look at the latest Euro (12z). It shows a 965mb symmetrical storm at 12z Sat. with the strongest winds on the western/southern side. However, just look at the satellite image, the southern side barely exists (eastern side is messed up bad as well). Even when it initialize at 12z today, that's not at all what "Sandy" looked like. Not even close. It has a long ways to go to even get close to what the Euro has tomorrow at 12z Sat. Could it? Of course, but again, the dry air is kicking Sandy's butt right now."


"One other thing to notice. Look at 96 hours vs. 120 hours on the latest Euro. You see how fast the model weakens the storm? I agree with you that it's already transitioning, but the Euro shows a mostly tropical system with weakening like that at landfall. That's what you see with a hurricane, not a mid-latitude hybrid storm. That alone makes me very skeptical in taking the model guidance as fact..."

Wednesday, October 24, 2012

1991 "Perfect Storm"


Something to think about... I keep hearing comparisons to the 1991 "Perfect Storm". That's fine, BUT... The "Perfect Storm" stayed about 150 miles offshore. It never made landfall in the US! The lowest recorded pressure reached 972mb. 
However, the pressure gradient was extreme (~70mb) with a strong high parked in eastern Canada. Similar setup here in some ways (yet very different in others), but if "Sandy" comes in (really think it's becoming more and more likely. Thought this way since Monday morning mainly because of a strong -NAO), it will cause a lot more direct impact to the NE US. #IMPACT

http://www.youtube.com/watch?v=zJgAwSMuSA8




Monday, October 22, 2012

New England Trouble? I say YES!



While the Euro is overdone, I lean more towards a strong storm affecting the US coast because of blocking. SEE: http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.sprd2.gif

This will help the trough dig in next week and phase with "Sandy". Obviously still a long ways out, but there is legitimate potential here!



UPDATE (10/23/12 - 10PM):

From the first time I saw this coming together, I thought it was very possible if not likely after seeing how negative the NAO was (see post above). It's like a toll booth, backing up trough after trough and really helping with phasing. I never bought the escape out to sea, even though that's still a possibility. 

Ironically, even when the GFS was out to sea, the GFS ensembles really pointed towards phasing and a strong storm. However, keep in mind that the Euro has notoriously way overdone tropical cyclones at higher latitudes. A sub 940mb storm into NYC? In late October? That's just crazy and way overdone. I'm pretty sure the New England Hurricane of 1938 had a 941mb pressure at landfall (lowest I have ever seen at least). I believe the 1991 "Perfect Storm" got down to 972mb. Obviously, the strength and overall effects depend on more than just pressure (huge pressure gradient with the 1991 storm even with the 972mb pressure), but yesterday the Euro had this storm at 928mb just offshore of NYC. Today, still below 940mb? LOL! 

Of course anything is possible I guess, but I HIGHLY doubt that. It will be a strong formable hybrid storm, but this is not the New England Hurricane of 1938 in my personal opinion. Anything in the 950's/960's is exceptional, especially with a strong high not that far away (HUGE pressure gradient). There is still a lot of time to watch everything come together as any option is still on the table. I feel strongly it will affect the US, but things can and usually do change quickly!

Sunday, September 16, 2012

Hurricane Isaac Video - New Orleans


It has been a LONG TIME!  Sorry about that, but life gets busy sometimes.  I did want to post some footage I shot during Hurricane Isaac in downtown New Orleans.  A longer higher quality version will eventually be released.  I need a new computer/video editing program, as it can't handle HD video for whatever reason?  It just keeps shutting down or locking up/freezing.  The video still turned out great for raw untouched video...  Enjoy!

Hurricane Isaac Video - New Orleans:  http://www.youtube.com/watch?v=SvRsXIkWkf4


Here is the video info which is posted on youtube:


During the night of August 28th into the early morning hours of August 29th, Hurricane Isaac made landfall on the Southeast Louisiana coast as a category-1 hurricane.  Maximum sustained winds were 80mph with a minimum central pressure of 968mb.  Ironically, on the seven year anniversary of Hurricane Katrina, I chased Isaac with three close friends (Rob Jones, Michael Laca, and Devin Toporek) in downtown New Orleans.  Due to funneling of the winds around large buildings (Venturi Effect), winds gusted at times over 100mph.  This is nearly six minutes of raw untouched footage I shot that night.  A longer higher quality version will eventually be released...

HURRICANECHASER.NET

©Copyright Greg Nordstrom 2012

ANY USE OF THIS VIDEO WITHOUT PERMISSION FROM GREG NORDSTROM IS PROHIBITED AND WILL BE PROSECUTED TO THE FULLEST EXTENT OF THE LAW!!!

Friday, June 15, 2012

Bob Simpson


The life of Bob Simpson - The Simpson in the Saffir-Simpson Hurricane Wind Scale


*There are a couple inaccuracies, but still a great story...

http://www.usatoday.com/weather/hurricane/story/2012-06-13/hurricane-simpson/55605488/1

Tuesday, June 12, 2012

Derecho


Derechos:  Widespread Convectively Induced Windstorms

This is a great paper, as I think the criteria of a derecho is often confused...

http://www.spc.noaa.gov/misc/AbtDerechos/papers/Johns_1987.pdf

Friday, June 1, 2012

2012 Atlantic Hurricane Season


While we have already reached two named storms, today marks the official start of the 2012 Atlantic hurricane season.  It's go time in my eyes, as this is by far my favorite season in weather!  Wherever they strike the US, Caribbean, Bahamas, Mexico, etc, I'll be there this season within reason of course.  I have a weird feeling I'll get into a couple landfalls this year, but we'll see?  I already took the worst (northern eyewall) of Tropical Storm Beryl in Amelia Island, FL.  According to Chris Landsea (NHC), TS Beryl was the strongest tropical or subtropical cyclone landfall on record in the U.S. prior to June 1st.  I personally never experienced hurricane conditions, but the winds gusted well into the 60's.  Pretty amazing for May!

Here is the plan for the coming week or two...

1)  Start to edit survivor video I shot this January from the 1935 "Labor Day" Hurricane which devastated parts of the Florida Keys.  The strongest hurricane to ever strike the US in recorded time.  Some of this video is beyond amazing and I feel incredibly lucky to have met these survivors!  Full story soon...

2)  Recap of my Tropical Storm Beryl chase and my trip to Texas with Mark Sudduth from hurricanetrack.com.  Worked on the NOAA Sentinel and successfully launched HURR-B.  I will continue to work with Mark this season, as we have lots of great projects planned...

3)  Really start getting into several historical hurricane books I have bought.  I'll provide a list of the books I plan on reading and eventually provide reviews for each book I read this season.  Should be informative and fun!

4)  Start to work on my new website, as I'm going to transition from a blog to a full website.  It will obviously take some work/time (not really sure what I'm doing?  lol), but I'll get it done as soon as possible...

5)  Did I mention this is my favorite season in weather?  Lol!  Like I said, it's GO TIME, as I'm ready to go full force into the tropics!

*Like I stated earlier in May, I'm not going to get into a seasonal forecast this year.  However, for fun, here are my numbers.  I do agree with the general consensus of lower overall numbers and higher impact.  Again, that won't be hard considering the last few years.  Pure statistics tell you that...

- 12 named storms
- 3 landfalling storms  (One already with TS Beryl)
- Watch for "homegrown" activity and rapid feedback before landfall