July pattern(s) and discussion

[powderfreak]

4 minutes ago, dryslot said:

Hit the snooze button.

We like this boring... tomorrow and Friday should be spectacular.

BTV-

“Thursday will be a beautiful day as high pressure builds to our west, imparting cool northerly winds. Skies will be clear with no chance for rain. Highs should top in the mid 70s to lower 80s. The diurnal curve will be steep with plenty of dry air, mid-level high in place, and light northerly winds. Expect lows in the 50s across the valleys, with 40s across higher terrain. The ECMWF is even suggesting a low temperature of 39 at SLK.”

 

[Lava Rock]

Hit the snooze button.

No surprise here

[Torch Tiger]

24 minutes ago, radarman said:

The TDWR program started after a downburst took down a plane at DFW airport 8/2/85 killing 125 people.  The narrow beam they have was chosen to sense localized azimuthal shear.  But the planes themselves do not have on board weather radar.

Would be nice to have a TDWR (or similar) at BDL.

That crash killed 137 total if you include the crew/pilots, on ground and people who died of injuries. I had forgotten the details but they aborted landing in N.O. only to take a chance at DFW

[Lava Rock]

Hallelujah, it's raining.

[TalcottWx]

10 minutes ago, radarman said:

The TDWR program started after a downburst took down a plane at DFW airport 8/2/85 killing 125 people.  The narrow beam they have was chosen to sense localized azimuthal shear.  But the planes themselves do not have on board weather radar.

Would be nice to have a TDWR (or similar) at BDL.

Luckily Logan doesn't have the major altitude differences that cause many of the low level shear plane accidents. So by the time they reach visibility minimums, pilots have plenty of time to go around. Logan got down to a cat 1 ceiling today. In order to fly a CAT I approach, the cloud based (ceiling) must be no lower than 200 feet and the visibility must be no lower than 550 metres. This is because the pilots must be able to visually identify the runway no later than 200 feet above the ground to be able to land. It goes up to cat 3 ils, there are also several variances to cat 3, making landing requirements more strict. 

CAT IIIa has a minimum ceiling of 50 ft and a minimum visibility of 200 metres.

CAT IIIb has no minimum ceiling, but there must be at least 50 metres of visibility.

For a CAT IIIc, which has not actually been implemented anywhere, there are no minimum limits for ceiling and visibility.

Would lead one to believe, 'why isn't cat 3 all the time?'. Cost and pilot experience from most of my research is what limits that. 

Always loved planes. It what drew me to weather. Trying to land in low vis while following exact directions is difficult to do alone in a flight Sim, let alone in real life. 

I've seen bad conditions ground planes for awhile at Logan. Usually only 30-60 mins. Snow operations some times cannot keep up more than anything. Especially considering blowing and drifting on open airport hellscapes. This was a unique one. Perhaps the type of event we really only accurately pick up immediately now due to things like TDWR. We can see the microbursts in real time now. 

Thought it was really obvious pike region to BOS was the target about an hour before due to the cu field and boundary. Did not expect the multiple microbursts though. So a lot of lightning today out of tcu that wasn't even registering on radar yet, exploding into hail packed 70mph monsters just 7 minutes later. There's a really delicate balance of Seabreeze, outflow boundaries etc that seems to contribute to promoting these microbursts right at the coastline. 

I truthfully believe Scott may be right regarding uhi and addition of building in Seaport. It's become truly obnoxious. It's beautifully obnoxious if you enjoy coeds.

But a SW wind or W wind probably does bring more heat than even five years ago. But this does not excuse more recent issues with the *temperature* (not wind) readings. 

[radarman]

 

Thanks Jay great post.

A lot of these microbursts are really just multicell collapses, particularly with steeper low level lapse rates in place.  I don't think they are especially tied to enhanced shear areas that weak boundaries might provide.  The low level shear algs are actually focusing quite often on the diverging winds near the surface as the descending column hits the ground.   Also, they are pretty hard to anticipate the location based on storm structure alone, unlike with some other types of wind events, gust fronts, bowing segments, etc., and require a beam close to the ground because the sig doesn't extend up too high.

[BombsAway1288]

Logan go absolutely rocked. Saw it with my own eyes. Witnessed a JetBlue A320 do a go-around as it was on final approach to 22L, just to the east of Suffolk Downs. At that point the microburst was just heading for Logan from the south so I suspect the pilot had the threshold of 22L in sight and when he passed where I was at about 200ft of altitude, when the beginning of the runway suddenly just disappeared wit the storm moving up from the south and had to suddenly abort. 

Very cool to witness and watch it all unfold

[Lava Rock]

Hallelujah, it's raining.

Didn't even wet the pavement. Hoping the line coming will hold up but appears to be disapating

[Lava Rock]

Luckily Logan doesn't have the major altitude differences that cause many of the low level shear plane accidents. So by the time they reach visibility minimums, pilots have plenty of time to go around. Logan got down to a cat 1 ceiling today. In order to fly a CAT I approach, the cloud based (ceiling) must be no lower than 200 feet and the visibility must be no lower than 550 metres. This is because the pilots must be able to visually identify the runway no later than 200 feet above the ground to be able to land. It goes up to cat 3 ils, there are also several variances to cat 3, making landing requirements more strict. 

CAT IIIa has a minimum ceiling of 50 ft and a minimum visibility of 200 metres.

CAT IIIb has no minimum ceiling, but there must be at least 50 metres of visibility.

For a CAT IIIc, which has not actually been implemented anywhere, there are no minimum limits for ceiling and visibility.

Would lead one to believe, 'why isn't cat 3 all the time?'. Cost and pilot experience from most of my research is what limits that. 

Always loved planes. It what drew me to weather. Trying to land in low vis while following exact directions is difficult to do alone in a flight Sim, let alone in real life. 

I've seen bad conditions ground planes for awhile at Logan. Usually only 30-60 mins. Snow operations some times cannot keep up more than anything. Especially considering blowing and drifting on open airport hellscapes. This was a unique one. Perhaps the type of event we really only accurately pick up immediately now due to things like TDWR. We can see the microbursts in real time now. 

Thought it was really obvious pike region to BOS was the target about an hour before due to the cu field and boundary. Did not expect the multiple microbursts though. So a lot of lightning today out of tcu that wasn't even registering on radar yet, exploding into hail packed 70mph monsters just 7 minutes later. There's a really delicate balance of Seabreeze, outflow boundaries etc that seems to contribute to promoting these microbursts right at the coastline. 

I truthfully believe Scott may be right regarding uhi and addition of building in Seaport. It's become truly obnoxious. It's beautifully obnoxious if you enjoy coeds.

But a SW wind or W wind probably does bring more heat than even five years ago. But this does not excuse more recent issues with the *temperature* (not wind) readings. 

I've always liked watching planes and amazed at their capabilities and the pilots vast knowledge and experience to deal with last minute changes like today's weather. My wife's a flight attendant out of Boston, so I get to hear about a lot of stories.

[rimetree]

Decent storm in Portsmouth earlier. Saw some tweets of ping pong size hail. Didn't see anything like that as I think the most severe was just to my northwest. 71/65

[CT Rain]

1 hour ago, radarman said:

The TDWR program started after a downburst took down a plane at DFW airport 8/2/85 killing 125 people.  The narrow beam they have was chosen to sense localized azimuthal shear.  But the planes themselves do not have on board weather radar.

Would be nice to have a TDWR (or similar) at BDL.

Right? It's a shame we don't.

[Lava Rock]

Wtf. Everyone along the front in Maine gets rn except sebago south

[HIPPYVALLEY]

1 hour ago, Lava Rock said:

Hallelujah, it's raining.

We got porked here.  I have to check but I believe I am under 2" for the month of July.

[TalcottWx]

Got a hold of an awesome video from a friend who wants nothing to do with talking to media. So before I get accused of being James and you see a video with my name on it on the news, that's why.

 

 

 

[TalcottWx]

45 minutes ago, Lava Rock said:

1 hour ago, sbos_wx said:

Luckily Logan doesn't have the major altitude differences that cause many of the low level shear plane accidents. So by the time they reach visibility minimums, pilots have plenty of time to go around. Logan got down to a cat 1 ceiling today. In order to fly a CAT I approach, the cloud based (ceiling) must be no lower than 200 feet and the visibility must be no lower than 550 metres. This is because the pilots must be able to visually identify the runway no later than 200 feet above the ground to be able to land. It goes up to cat 3 ils, there are also several variances to cat 3, making landing requirements more strict. 

CAT IIIa has a minimum ceiling of 50 ft and a minimum visibility of 200 metres.

CAT IIIb has no minimum ceiling, but there must be at least 50 metres of visibility.

For a CAT IIIc, which has not actually been implemented anywhere, there are no minimum limits for ceiling and visibility.

Would lead one to believe, 'why isn't cat 3 all the time?'. Cost and pilot experience from most of my research is what limits that. 

Always loved planes. It what drew me to weather. Trying to land in low vis while following exact directions is difficult to do alone in a flight Sim, let alone in real life. 

I've seen bad conditions ground planes for awhile at Logan. Usually only 30-60 mins. Snow operations some times cannot keep up more than anything. Especially considering blowing and drifting on open airport hellscapes. This was a unique one. Perhaps the type of event we really only accurately pick up immediately now due to things like TDWR. We can see the microbursts in real time now. 

Thought it was really obvious pike region to BOS was the target about an hour before due to the cu field and boundary. Did not expect the multiple microbursts though. So a lot of lightning today out of tcu that wasn't even registering on radar yet, exploding into hail packed 70mph monsters just 7 minutes later. There's a really delicate balance of Seabreeze, outflow boundaries etc that seems to contribute to promoting these microbursts right at the coastline. 

I truthfully believe Scott may be right regarding uhi and addition of building in Seaport. It's become truly obnoxious. It's beautifully obnoxious if you enjoy coeds.

But a SW wind or W wind probably does bring more heat than even five years ago. But this does not excuse more recent issues with the *temperature* (not wind) readings. 

I've always liked watching planes and amazed at their capabilities and the pilots vast knowledge and experience to deal with last minute changes like today's weather. My wife's a flight attendant out of Boston, so I get to hear about a lot of stories.

I don't fly often. I would love a job that requires it. But when I do fly, all I do is stare out the window. I constantly look at the aviation charts in the days leading up to the flight. It's a ton of fun. 

[Lava Rock]

We got porked here.  I have to check but I believe I am under 2" for the month of July.

Porked here. Literally 2 min of sprinkles then she died. Ground is parched

[kdxken]

july-will-warmest-month-ever-recorded-boston

 

https://www.bostonglobe.com/metro/2019/07/31/july-will-warmest-month-ever-recorded-boston/od20eTxfUb53bglxAoB4xO/story.html

[powderfreak]

42 minutes ago, kdxken said:

july-will-warmest-month-ever-recorded-boston

 

https://www.bostonglobe.com/metro/2019/07/31/july-will-warmest-month-ever-recorded-boston/od20eTxfUb53bglxAoB4xO/story.html

Oh boy, ha.  

[dryslot]

1 hour ago, kdxken said:

july-will-warmest-month-ever-recorded-boston

 

https://www.bostonglobe.com/metro/2019/07/31/july-will-warmest-month-ever-recorded-boston/od20eTxfUb53bglxAoB4xO/story.html

*

[dryslot]

3 hours ago, powderfreak said:

We like this boring... tomorrow and Friday should be spectacular.

BTV-

“Thursday will be a beautiful day as high pressure builds to our west, imparting cool northerly winds. Skies will be clear with no chance for rain. Highs should top in the mid 70s to lower 80s. The diurnal curve will be steep with plenty of dry air, mid-level high in place, and light northerly winds. Expect lows in the 50s across the valleys, with 40s across higher terrain. The ECMWF is even suggesting a low temperature of 39 at SLK.”

 

Dry and low to mid 80's as far as the eyes can see.

[HIPPYVALLEY]

1 hour ago, kdxken said:

july-will-warmest-month-ever-recorded-boston

 

https://www.bostonglobe.com/metro/2019/07/31/july-will-warmest-month-ever-recorded-boston/od20eTxfUb53bglxAoB4xO/story.html

 

I find this all really interesting because it's really only been on the warm side of a normal summer here.  Many of the hot days have been tolerable humidity so I guess that helps.  There are no accurate long term records for this part of the state but I bet we have been no more than a +2 - +2.5 for July.

[Dan76]

3 hours ago, powderfreak said:

We like this boring... tomorrow and Friday should be spectacular.

BTV-

“Thursday will be a beautiful day as high pressure builds to our west, imparting cool northerly winds. Skies will be clear with no chance for rain. Highs should top in the mid 70s to lower 80s. The diurnal curve will be steep with plenty of dry air, mid-level high in place, and light northerly winds. Expect lows in the 50s across the valleys, with 40s across higher terrain. The ECMWF is even suggesting a low temperature of 39 at SLK.”

 

Can you ship some of that down here?

[Baroclinic Zone]

+4.2F for the month.  That's pretty damn impressive

[dendrite]

10 hours ago, HIPPYVALLEY said:

 

I find this all really interesting because it's really only been on the warm side of a normal summer here.  Many of the hot days have been tolerable humidity so I guess that helps.  There are no accurate long term records for this part of the state but I bet we have been no more than a +2 - +2.5 for July.

+4.2F

 

Climatological Data for GREENFIELD NO. 3, MA - July 2019
Click column heading to sort ascending, click again to sort descending.

2019-07-01	84	55	69.5	1.0	0	5	0.24	0.0	0
2019-07-02	85	57	71.0	2.4	0	6	0.00	0.0	0
2019-07-03	83	61	72.0	3.3	0	7	0.00	0.0	0
2019-07-04	89	62	75.5	6.7	0	11	0.00	0.0	0
2019-07-05	91	62	76.5	7.7	0	12	0.00	0.0	0
2019-07-06	89	64	76.5	7.6	0	12	0.00	0.0	0
2019-07-07	92	64	78.0	9.0	0	13	0.05	0.0	0
2019-07-08	82	52	67.0	-2.1	0	2	0.00	0.0	0
2019-07-09	84	52	68.0	-1.1	0	3	0.00	0.0	0
2019-07-10	86	55	70.5	1.3	0	6	0.00	0.0	0
2019-07-11	88	59	73.5	4.3	0	9	0.00	0.0	0
2019-07-12	84	61	72.5	3.2	0	8	0.05	0.0	0
2019-07-13	86	61	73.5	4.2	0	9	0.00	0.0	0
2019-07-14	86	63	74.5	5.2	0	10	0.00	0.0	0
2019-07-15	86	59	72.5	3.1	0	8	0.00	0.0	0
2019-07-16	83	56	69.5	0.1	0	5	0.00	0.0	0
2019-07-17	90	57	73.5	4.1	0	9	0.00	0.0	0
2019-07-18	89	69	79.0	9.5	0	14	0.15	0.0	0
2019-07-19	78	66	72.0	2.5	0	7	0.02	0.0	0
2019-07-20	91	66	78.5	9.0	0	14	0.00	0.0	0
2019-07-21	95	69	82.0	12.5	0	17	0.04	0.0	0
2019-07-22	92	64	78.0	8.5	0	13	0.00	0.0	0
2019-07-23	83	62	72.5	3.0	0	8	2.00	0.0	0
2019-07-24	75	58	66.5	-3.0	0	2	0.16	0.0	0
2019-07-25	82	54	68.0	-1.5	0	3	0.00	0.0	0
2019-07-26	83	56	69.5	0.0	0	5	0.00	0.0	0
2019-07-27	86	57	71.5	2.0	0	7	0.00	M	M
2019-07-28	85	61	73.0	3.5	0	8	0.00	0.0	0
2019-07-29	90	62	76.0	6.5	0	11	0.08	0.0	0
2019-07-30	89	66	77.5	8.0	0	13	0.00	0.0	0
2019-07-31	91	67	79.0	9.6	0	14	0.12	0.0	0
Sum	2677	1877	-	-	0	271	2.91	0.0	-
Average	86.4	60.5	73.5	4.2	-	-	-	-	0.0
Normal	81.4	57.1	69.3	-	19	151	4.31	M	-

[Lava Rock]

I don't know what our July avg is supposed to be, but I recorded 71.9F. The rest of the stats:

 ---------------------------------------------------------------------------------------------
   Averages\Extremes for the month of July 2019
 
 ---------------------------------------------------------------------------------------------
 Average temperature     = 71.9°F
 Average humidity        = 72%
 Average dewpoint        = 61.8°F
 Average barometer       = 29.511 in.
 Average windspeed       = 0.4 mph
 Average gustspeed       = 1.3 mph
 Average direction       = 156° (SSE)
 Rainfall for month      = 2.098 in.
 Rainfall for year       = 15.555 in.
 Maximum rain per minute = 0.060 in on day 06 at time 16:21
 Maximum temperature     = 90.3°F on day 30 at time 14:51
 Minimum temperature     = 55.6°F on day 07 at time 06:43
 Maximum humidity        = 100% on day 28 at time 08:13
 Minimum humidity        = 32% on day 08 at time 14:34
 Maximum dewpoint        = 76.2°F on day 21 at time 10:57
 Minimum dewpoint        = 45.6°F on day 08 at time 12:00
 Maximum pressure        = 29.88 in. on day 27 at time 09:02
 Minimum pressure        = 29.21 in. on day 21 at time 12:12
 Maximum windspeed       = 8.1 mph from 210°(SSW) on day 27 at time 15:53
 Maximum gust speed      = 15.0 mph from 225°( SW) on day 28 at time 15:11
 Maximum heat index      = 98.6°F on day 20 at time 12:41
 Avg daily max temp :81.6°F
 Avg daily min temp :63.7°F
 Total windrun = 320.4miles
 -----------------------------------
 Daily rain totals
 -----------------------------------
 00.01 in.  on day 1
 00.61 in.  on day 6
 00.26 in.  on day 11
 00.91 in.  on day 12
 00.08 in.  on day 17
 00.09 in.  on day 22
 00.14 in.  on day 23

 

[OceanStWx]

11 hours ago, powderfreak said:

Oh boy, ha.  

 

10 hours ago, dryslot said:

*

Good news is that PWM tied the all time warmest month, even in the threaded database with iffy 1870s records. 

If BOS was the only site that did it Scooter would be wandering around the Seaport chucking * at random strangers.

[OceanStWx]

8 minutes ago, Lava Rock said:

I don't know what our July avg is supposed to be, but I recorded 71.9F. The rest of the stats:

We average 69.9 here. Closer to 67 as you move up towards Bridgton.

[butterfish55]

48 minutes ago, Baroclinic Zone said:

+4.2F for the month.  That's pretty damn impressive

**

[dryslot]

47 minutes ago, OceanStWx said:

 

Good news is that PWM tied the all time warmest month, even in the threaded database with iffy 1870s records. 

If BOS was the only site that did it Scooter would be wandering around the Seaport chucking * at random strangers.

Hmm, Media here has PWM at #1 all time topping 07/11, 72.9°F as oppose to 72.7°F, Maybe DIT wrote the article.

https://www.sunjournal.com/2019/07/31/july-was-the-hottest-month-ever-in-portland/

[Damage In Tolland]

Torches flying everywhere