July 22, 2011: A day of records

By: Dr. Jeff Masters , 4:56 PM GMT on July 23, 2011

Share this Blog
8
+

The crest of the extreme heat wave of July 2011 has passed, although temperatures are still going to be dangerously hot in the Mid-Atlantic and Northeast today. New York City (Central Park) will reach 100° again, as well as Philadelphia and possibly Washington Dulles. Heat index values could surpass the 110° mark today, and excessive heat warnings are in effect from New York City to South Carolina, as well as a large portion of the Central United States. Yesterday, the heat index soared past 120° in Wilmington, DE (124), Easton, MD (125), Annapolis, MD (120) and Atlantic City, NJ (122), among others. A more complete list of Friday's heat index extremes can be found here.

Numerous records fell yesterday as far north as Maine. There were plenty of daily records to talk about, but here are some of the noteworthy all-time record high temperatures:

Newark, NJ: 108° (old record was 105° set in 2001)
Washington Dulles, DC: 105° (old record was 104° on multiple dates)
Bridgeport, CT: 103° (ties the old record set in 1957)
Hartford, CT: 103° (old record was 102° set on multiple dates)
New Haven, CT: 102° (old record was 101° set in 1926)

Baltimore hit 106°, one degree shy of their all-time high record which was set in 1936. New York City (Central Park) set a daily record of 104°, which was 2 degrees shy of their 106° all-time high record, which was also set in 1936. More on the record-setting year of 1936 in yesterday's blog from Jeff. Two notable all-time record high minimums were also set yesterday: 84° in New York (Central Park) and 86° in Newark, NJ.

Our weather historian, Christopher C. Burt, keeps track of 303 select stations in the U.S. with long standing record histories. So far this summer, seven of these have broken or tied their all-time maximum temperature records. Some of these were long-standing:

• Amarillo, TX 111° (1892)
• Dodge City, KS 110° (1874 tied)
• Newark, NJ 108° (1893)
• D.C. Dulles 105° (1962)
• Tallahassee, Fl 105° (1883)
• Hartford, CT 103° (1885)
• New Haven, CT 102° (1780)

The last summer to have more all-time high records than this year was 2002, which set 9. Christopher C. Burt estimates that yesterday probably rates in the top five hottest days on record for the mid-Atlantic states (Washington D.C. to Boston).

Invest 90L


Satellite imagery of NHC Invest 90L this morning.

Invest 90L is looking ragged on satellite as it makes its way across the Caribbean islands. While this wave looked ripe for eventual development earlier this week, it has really taken a turn for the worse as it moved across the Main Development Region of the North Atlantic. Today, low level circulation is could favorably be described as less than moderate, and almost nonexistent at higher levels. Today, not one of the global models I've looked at (ECMWF, NOGAPS, CMC, UKMET, or GFS) develop 90L, but they are coming into better agreement that the wave's track will be across the Caribbean islands and into the Gulf of Mexico, rather than up the east coast of Florida. This could be one of the reasons the models are not suggesting development—too much land interaction, not enough time over open warm waters. However, its hard to say that this wave will not show some signs of improvement when it reaches the Gulf. Water will be toasty, moisture will be relatively high, and wind shear will remain incredibly low. Today the National Hurricane Center is giving this wave a 20% chance of development over the next 48 hours. My forecast has been the same for the past two days, right around 20% chance of development over the lifetime of the wave.

Thanks to our weather historian Christopher C. Burt for some useful information on heat waves and yesterday's records. I'll have another blog on Monday.

Angela

Reader Comments

Comments will take a few seconds to appear.

Post Your Comments

Please sign in to post comments.

or Join

Not only will you be able to leave comments on this blog, but you'll also have the ability to upload and share your photos in our Wunder Photos section.

Display: 0, 50, 100, 200 Sort: Newest First - Order Posted

Viewing: 1161 - 1111

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49Blog Index

Quoting Tazmanian:



During active periods of hurricane season, these rules will be strictly enforced. Violations will be met with a minimum 24 hour ban


okay taz sorry, my fault. but it is funny.. 90L doesn't look good at all. I had said it was gonna be a TD by this evening, guess not. Crow is a good meal if it's cooked correctly. Now I included some tropical weather talk.
Member Since: Posts: Comments:
1160. Patrap
Member Since: Posts: Comments:
Quoting Autistic2:
I googled it but could not find an answer. What is a well-defined inverted V signature?


From Weather456's blog back in 08.

A tropical wave is defined as a westward propagation of convective signature forming within the instability of the African Easterly Jet (AEJ) over Central-Eastern Africa with maximum intensity in the mid-lower levels and associated with wind shifts, pressure and moisture fluctuations.

Characteristics of Frank's Inverted "V" Model

The cloud bands associated with these waves are aligned parallel or near parallel to the lower level winds. The lower level winds are southeast behind the axis and northeast ahead. Hence the cloud bands take on an upside inverted signature.
Typically found between the Cape Verdes and the Lesser Antilles

Edit: Looks like atmo beat me to it!
Member Since: Posts: Comments:
Quoting Stormchaser2007:
All reliable guidance indicates the Atlantic should remain quiet for another week or so.


Indeed.
Member Since: Posts: Comments:
Quoting Autistic2:
I googled it but could not find an answer. What is a well-defined inverted V signature?
Some competent discussion of that and good examples are in one of Weather456's old blogs here: http://www.wunderground.com/blog/Weather456/comme nt.html?entrynum=138
Member Since: August 16, 2007 Posts: 6 Comments: 12463
Quoting HimacaneBrees:




THE BLOG PATROL!!!!



During active periods of hurricane season, these rules will be strictly enforced. Violations will be met with a minimum 24 hour ban
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
what dos the gfs shwo for the E PAC?
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
Quoting Stormchaser2007:
All reliable guidance indicates the Atlantic should remain quiet for another week or so.


GFS goes to August 9th without anything developing.
Member Since: April 29, 2009 Posts: 75 Comments: 14913
I googled it but could not find an answer. What is a well-defined inverted V signature?
Member Since: Posts: Comments:
1149. scott39
Does anyone have a closer view of 90L?
Member Since: Posts: Comments:
wind shear is not ther best for 90L
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
1147. scott39
Quoting Tazmanian:



some in tells me the nhc is geting ready tooo drop 90L
When they go to near 0%....then they are closer to dropping it. If they keep it at 10% at 2pm...then I would say we need to keep watching it!
Member Since: Posts: Comments:
I want a hurricane! Not here of course.
Member Since: July 19, 2011 Posts: 12 Comments: 2532
1145. scott39
Looks like 90L doesnt care about Dmin and Dmax. Its starting to fire off some convection.
Member Since: Posts: Comments:
Quoting PcolaDan:


Taz you need to settle down a bit. People post the same copies of maps all the time. Just like when so many post the TWO. He is not spamming the blog. At least he is not posting about farts like I have seen here before. Chill bud.



no commets not going too get in too this moveing on
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
Quoting Stormchaser2007:
All reliable guidance indicates the Atlantic should remain quiet for another week or so.



yup like i said last night it looks like we have a vary weak EL nino
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
All reliable guidance indicates the Atlantic should remain quiet for another week or so.
Member Since: June 9, 2007 Posts: 4 Comments: 15950
Quoting Tazmanian:



will you plzs stop with the maps we get it your doing nothing but spaming the blog


Taz you need to settle down a bit. People post the same copies of maps all the time. Just like when so many post the TWO. He is not spamming the blog. At least he is not posting about farts like I have seen here before. Chill bud.
Member Since: Posts: Comments:
Quoting TropicalAnalystwx13:


I agree. Most of our systems will originate off the East Coast or just before entering the Caribbean.



Very typical of a Neutral year for storms to really take off beyond the 40th longitude.
Member Since: Posts: Comments:
Quoting TropicalAnalystwx13:
90L has a lot of work to do...




some in tells me the nhc is geting ready tooo drop 90L
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
1138. nigel20
Quoting beell:
Don't know if I would call the Atlantic totally void of dry air.

Tropical Atlantic WV Loop
I was just talking about the MDR.
Member Since: Posts: Comments:
90L has a lot of work to do...

Member Since: July 6, 2010 Posts: 113 Comments: 32862
Quoting ProgressivePulse:
There is such a thing as TOO much high pressure around. As was the case in 2004 and why the first storm didn't form until the very end of July. July storms need pretty good conditions to get going and typically why you don't see many during the month. As the highs migrate north in August this opens the door to the deep tropics. An end of year map like 2004 seems very likely this year, adding Arlene of course.



I agree. Most of our systems will originate off the East Coast or just before entering the Caribbean.
Member Since: July 6, 2010 Posts: 113 Comments: 32862
1135. nigel20
Quoting Tazmanian:



no you said that map showed dry air wsih it dos not not it olny shows where the SAL is
Ok fine
Member Since: Posts: Comments:
1134. beell
Don't know if I would call the Atlantic totally void of dry air.

Tropical Atlantic WV Loop
Member Since: September 11, 2007 Posts: 145 Comments: 16924
1133. aquak9
Quoting MrCowan:
Good afternoon, all.


Good afternoon. What brings you to this lovely site, besides the internet?
Member Since: Posts: Comments:
Quoting nigel20:
That's what i meant i know that the map is showing the Saharan air layer



no you said that map showed dry air wsih it dos not not it olny shows where the SAL is
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
There is such a thing as TOO much high pressure around. As was the case in 2004 and why the first storm didn't form until the very end of July. July storms need pretty good conditions to get going and typically why you don't see many during the month. As the highs migrate north in August this opens the door to the deep tropics. An end of year map like 2004 seems very likely this year, adding Arlene of course.

Member Since: Posts: Comments:
1130. nigel20
Quoting Tazmanian:



oh and that map is show SAL or dust not dry air
That's what i meant i know that the map is showing the Saharan air layer
Member Since: Posts: Comments:
Quoting nigel20:
I'm so sorry about that didn't mean to.



thats ok all so if you look at the other commets some of the same maps you posted are there so plzs look at the commets be for post more maps of the same thing
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
1128. nigel20
Quoting Tazmanian:



will you plzs stop with the maps we get it your doing nothing but spaming the blog
I'm so sorry about that didn't mean to.
Member Since: Posts: Comments:
Quoting nigel20:
Dry air is virtually gone from the atlantic.



oh and that map is show SAL or dust not dry air
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
1125. nigel20
Quoting FLWeatherFreak91:
We'll see the high move slightly further east in the coming weeks, but not significantly. So, I also see problems for the gulf coast and e coast of fl, along with the antilles.
Yeah
Member Since: Posts: Comments:
Quoting nigel20:



will you plzs stop with the maps we get it your doing nothing but spaming the blog
Member Since: May 21, 2006 Posts: 5091 Comments: 115456
Quoting nigel20:
If the high continues in this position, there will be a lot of problems for the Caribbean and central america in the coming weeks.
We'll see the high move slightly further east in the coming weeks, but not significantly. So, I also see problems for the gulf coast and e coast of fl, along with the antilles.
Member Since: Posts: Comments:
Quoting nigel20:
Dry air is virtually gone from the atlantic.
SAL is disappearing like lightning.
Member Since: Posts: Comments:
1121. nigel20
Member Since: Posts: Comments:
1120. nigel20
Member Since: Posts: Comments:
1119. nigel20
Member Since: Posts: Comments:
9N 35W strong 850mb vorticity, no convection. low wind shear, little convergence and divergence. maybe that is the system the nogabs is talking about
Member Since: Posts: Comments:
1117. nigel20
Dry air is virtually gone from the atlantic.
Member Since: Posts: Comments:
Quoting HurricaneHunterJoe:
so basically the atmosphere is too stable???????????

Basically, instability plays a major role in tropical cyclone formation. It's a common misconception that if there is low wind shear and high SST's then formation is likely, when many other factors are involved.
Another basic article on Tropical Cyclone Genesis.
Link
Member Since: Posts: Comments:
1115. hotrods
We might want to keep an eye on 37w. The wave seems to be producing more thunderstorm activity.
Member Since: Posts: Comments:
Quoting IceCoast:


Here is some information I found on the importance of convergence and divergence. Written well too, easy to understand.
Link

thanks
Member Since: Posts: Comments:
Quoting HurricaneHunterJoe:
thank you very much ice. is there an easy answer on who to create convergence and divergence? i will go look up if there isnt ...lol....thanks


Here is some information I found on the importance of convergence and divergence. Written well too, easy to understand.
Link

Member Since: Posts: Comments:
so basically the atmosphere is too stable???????????
Member Since: Posts: Comments:

Viewing: 1161 - 1111

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49Blog Index

Top of Page

About

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

Local Weather

Overcast
39 °F
Overcast

JeffMasters's Recent Photos

Lake Effort Snow Shower Over Windsor, Ontario
Sunset on Dunham Lake
Pictured Rocks Sunset
Sunset on Lake Huron