Extreme storms and extreme heat hit the U.S.

By: Dr. Jeff Masters , 5:50 PM GMT on June 30, 2012

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A violent line of organized severe thunderstorms called a derecho swept across the U.S. from Illinois to Virginia on Friday, damaging houses, toppling trees, bringing down power lines. The storms killed six people in Virginia, two in New Jersey, and one in Maryland, and left at least 3.4 million people without power. The thunderstorms in a derecho (from the Spanish phrase for "straight ahead") create violent winds that blow in a straight line. The traditional definition of a derecho is a thunderstorm complex that produces a damaging wind swath of at least 240 miles (about 400 km), featuring a concentrated area of thunderstorm wind gusts exceeding 58 mph (93 km/hr.) A warm weather phenomenon, derechos occur mostly in summer, especially June and July in the Northern Hemisphere. They can occur at any time of the year and occur as frequently at night as in the daylight hours. As seen on our wundermap with the "go back in time" feature turned on, Friday's derecho began near Chicago in the early afternoon, then marched east-southeast, peaking in intensity over Virginia and Washington D.C. on Friday evening. The derecho was unusually intense due to the extreme heat, which helped create an unstable atmosphere with plenty of energy to fuel severe thunderstorms.


Figure 1. Radar image from our wundermap with the "go back in time" feature turned on for 11 pm EDT Friday June 29, 2012, showing the derecho over Washington D.C. and Baltimore. Click on the "hour" button above the wundermap to advance the time by one hour to watch the progress of the derecho across the country.


Figure 2. NOAA's Storm Prediction Center (SPC) logged 871 reports of damaging winds on Friday. Twenty one of these reports were for winds over 80 mph. The highest wind gust was in Oswego, Illinois: 92 mph.



Figure 3. A dramatic change in the weather in Buckeye land: the temperature at Ohio State University in Columbus, Ohio dropped from 97°F to 68° after passage of Friday's derecho. The storm brought a wind gust of 82 mph to campus, and 0.86" of rain.

Historic heat wave topples Dust Bowl-era extreme heat records
A historic heat wave on a scale and intensity not seen in the U.S. since the great heat waves of the 1930s Dust Bowl era set new all-time heat records for at least ten major cities Friday. According to wunderground's weather historian Christopher C. Burt, fifteen of the 303 major cities he maintains records for on the wunderground extremes page have set all-time heat records in the past four days. The only year with more all-time heat records is 1936, when 61 cities set all-time heat records. In 2011, which had the 2nd warmest summer in U.S. history, only ten of the 303 cities set all-time heat records during the entire summer. With the the hottest month of the year (July) still to come, 2012 threatens to rival the great Dust Bowl summer of 1936 for extreme heat.

All-time records for any date tied or broken on Friday:

109° Nashville, TN (old record 107° 7/28/1952
109° Columbia, SC (old record 107° on two previous occasions)
109° Cairo, IL (old record 106° on 8/9/1930)
108° Paducah, KY (ties same on 7/17/1942
106° Chattanooga, TN (ties same on 7/28/1952)
105° Raleigh, NC (ties same on 8/21/2007 and 8/18/1988)
105° Greenville, SC (old record 104° 8/10/2007 although 106° was recorded by the Signal Service in July 1887)
104° Charlotte, NC (ties same on 8/9 and 10/2007 and 9/6/1954)
102° Bristol, TN (ties same on 7/28/1952-this site now known as `Tri-State Airport')
109° Athens, GA. This is just 1° shy of the Georgia state record for June of 110° set at Warrenton in 1959.

All-time state June heat records set Friday:

113° Smyrna, TN (old record 110° in Etowah in June 1936)
109° Cairo, IL (old record 108° in Palestine in June 1954)

Also of note: Atlanta, GA hit 104° (its all-time June record), and just 1° shy of its all-time record of 105° set on 7/17/1980. The forecast for Atlanta on Saturday calls for a high of 105°F, which would tie for the hottest day in the city's history.

Wunderground's weather historian Christopher C. Burt has a new post called The Amazing June Heat Wave of 2012 Part 1: The West and Plains June 23 - 27 summarizing the early portion of this week's historic heat wave. He plans to make a follow-up post on Sunday summarizing the records set on Friday and Saturday.

Relatively quiet in the Atlantic
An area of heavy thunderstorms, associated with an upper level low pressure system, has developed in the Gulf of Mexico along the Texas coast. This disturbance will probably move ashore over Texas before development into a tropical depression can occur, and NHC is giving it a 0% chance of development. The tropical wave approaching the Lesser Antilles (Invest 97L) has dissipated due to dry air, and is no longer a threat. None of the reliable computer models are developing anything during the next seven days.

Jeff Masters

Chicago Shelf (LarrySmit)
Chicago Shelf
Summer Heat (gardner48197)
Summer Heat
Smokey Clouds (LarrySmit)
Asperatus Clouds
Smokey Clouds
And the Sky Opened Up! (webgal)
Much needed thunderstorms came through west-central Illinois late this evening. The lightning was absolutely incredible!
And the Sky Opened Up!

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There's no way to correct a fumble fingered accidental plus or minus on a comment, is there?

FYI I did not intend to plus 1181, oops. Not that folks here are interested in what I approve :-)

Just don't like the appearance of opining on what I'm not sure of...
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1204. beell
Quoting greentortuloni:


.... in short, yeah, anythign that can adapt rapidly is likely a pest.


Are you talkin' to me?

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1203. WunderAlertBot (Admin)
JeffMasters has created a new entry.
Quoting Tropicsweatherpr:
Here comes the EPAC into action.

TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
500 AM PDT MON JUL 2 2012

FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE..

SHOWERS AND THUNDERSTORMS HAVE INCREASED IN ASSOCIATION WITH A BROAD
LOW PRESSURE SYSTEM ABOUT 475 MILES SOUTH-SOUTHEAST OF ACAPULCO
MEXICO. SOME SLOW DEVELOPMENT OF THIS DISTURBANCE IS POSSIBLE
DURING THE NEXT COUPLE OF DAYS AS IT MOVES WEST-NORTHWESTWARD AT 10
TO 15 MPH. THIS SYSTEM HAS A LOW CHANCE...10 PERCENT...OF BECOMING
A TROPICAL CYCLONE DURING THE NEXT 48 HOURS.

$$
FORECASTER KIMBERLAIN




already 96E. Wow
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Here comes the EPAC into action.

TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
500 AM PDT MON JUL 2 2012

FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE..

SHOWERS AND THUNDERSTORMS HAVE INCREASED IN ASSOCIATION WITH A BROAD
LOW PRESSURE SYSTEM ABOUT 475 MILES SOUTH-SOUTHEAST OF ACAPULCO
MEXICO. SOME SLOW DEVELOPMENT OF THIS DISTURBANCE IS POSSIBLE
DURING THE NEXT COUPLE OF DAYS AS IT MOVES WEST-NORTHWESTWARD AT 10
TO 15 MPH. THIS SYSTEM HAS A LOW CHANCE...10 PERCENT...OF BECOMING
A TROPICAL CYCLONE DURING THE NEXT 48 HOURS.

$$
FORECASTER KIMBERLAIN

Member Since: April 29, 2009 Posts: 75 Comments: 14571
Quoting OracleDeAtlantis:
"Epic" is 3.5 million without power via a non-tropical windstorm event, striking Washington, D.CMake no mistake, it's a weather forecast, and at the very end; at the very moment you suddenly recognize or suspect what you're looking at, the illumination of the city changes. Perhaps it's because there aren't any lines attached ...?



I think you just drew a bunch of stuff and got lucky with a lot of extrapolation

And if you are so great at predicting these things, why not just write it out in plain english?
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Quoting drg0dOwnCountry:
Shrews Rapidly Evolving in Response to Climate Change



Shrecles/2012/07/02/shrews-rapidly-evolving-in-re sponse-to-climate-change.aspx" target="_blank" onclick="if(!checkUrl(this.href)) return false;" rel="nofollow">Link

Welcome the new overlords


I remember reading a book titled (I think) "The beak of the finch" about the adaption/evolution process of Finches on the Galapagos islands. The researchers were amazed at how much finches varied even in single generations based on the supply of different size berries.

But rapid evolution seems to be a capability of species with large variations in offspring, multiple offspring per birth cycle and frequent birth cycles.... in short, yeah, anythign that can adapt rapidly is likely a pest.
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1198. LargoFl
.........good morning folks!..great weather here in florida this week,maybe a shower or two later in the week, normal stuff..prayers for those people up in the midlantic states suffering thru that blasted heatwave with NO POWER STILL..geez..
Member Since: August 6, 2011 Posts: 4 Comments: 41000
Shrews Rapidly Evolving in Response to Climate Change



Shrews are among a diverse group of small mammals that have rapidly evolved in response to climate change, according to a new study released this month. Using historical climate data and modern molecular evidence from multiple genes, scientists found that some shrew species respond positively to periods of warmer and wetter climate through expanding geographic ranges and increased population sizes, while other shrew species respond the same way during periods of colder and drier climate.

The smallest mammals, such as mice and shrews, can reproduce rapidly yielding many generations of offspring in a short period of time. Because of this, they evolve comparatively quickly and as such are useful for studying how species in general respond to environmental changes. In addition, unlike many birds and larger mammals, they are non-migratory and thus exhibit both ecological and evolutionary responses to local conditions year-round. Shrews were therefore perfect model organisms to test predictions about the influence of historical climate change on resident species in the Arctic.


"Evolutionary adaptation is driven by necessity, favored by large gene pools, and accelerated by short intervals to reproductive maturity," said USGS Director Marcia McNutt. "All of these factors make shrews the ideal organism for examining genetic adaptation to climate change, understanding which is critical to helping manage wildlife in the decades ahead."

Climatic changes over the last 350 thousand years have caused dramatic environmental shifts at high latitudes. For example, glacial cold phases lasting approximately 75 thousand years were interspersed with warmer periods lasting 20 thousand years and the earth is now experiencing yet another of these warmer periods. Therefore, scientists conducting the current study used historical evidence to predict how small mammals in the Arctic have responded to past climate change and thus how such species may react to current and future climate scenarios.

“Our research suggests that early ancestors of this group of roughly a dozen shrew species experienced an ecological separation due to isolation in different areas, adapting to wetter or drier local conditions respectively,” said Dr. Andrew Hope, a geneticist with the USGS Alaska Science Center who led the research.

Following initial adaptation to different environments, each cold and dry glacial phase caused rapid expansion of one group of shrew species while those adapted to warmer and wetter conditions contracted into multiple small isolated areas. Then during each warm and wet interglacial phase the opposite dynamics occurred. As high-latitude climates alternated between warm and cold climate changes, species such as the shrews rode an evolutionary see-saw of alternating population growth and decline, which promoted the formation of new species. The result has been a rapid increase in number of species in the Arctic in a very short evolutionary timespan. Investigation of these shrews has also uncovered previously unrecognized genetic diversity possibly representing un-described species.

This study of historical evolutionary processes offers valuable insight into the future ecological responses of species to prevailing environmental trends. Resident small mammals constitute an important toolset for investigating biological responses to climate change.

Shrews are tiny mammals that rely on insects, worms and other invertebrates for food. Despite their diminutive size, they can be found in virtually every available terrestrial habitat in North America excluding the most arid desert regions, reflecting adaptation to a broad range of environmental conditions. Link

Welcome the new overlords
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Quoting Tribucanes:
Looking at radar this is going to eject with severe conditions attached and mid level circulation. Headed through the panhandle now and out to the N.E Gulf headed South West.

It's going the right way - to Texas - if it can survive the traipse through the high pressure.

That pinball about to eject out of Africa looks like it means business. Probably a yellow crayon by 2pm.
Member Since: August 4, 2007 Posts: 0 Comments: 3278
Quoting AussieStorm:












?
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Quoting trHUrrIXC5MMX:

awesome first sunight views..
kinda cool low near the Azores










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My next 7 days weather here in Sydney, Australia.

Anyone want to swap houses, I prefer hot weather.
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awesome first sunight views..
kinda cool low near the Azores
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1191. VR46L
Quoting HurricanePookie:


You know what would be cool though?

If they made shower curtains with the image posted on them.

Weather geeks the world over would have to have them.

Happy Birthday Grothar. Nice and quiet on my side of Florida tonight, anyway.




LOL

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Quoting Tribucanes:
Looking at radar this is going to eject with severe conditions attached and mid level circulation. Headed through the panhandle now and out to the N.E Gulf headed South West.

That's the strangest thing I have seen in a while. Just looked at it on high resolution radar!
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Comment 1154 has a nice link of information. A good read and it's short.
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Wrong way storm on our hands?
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Looking at radar this is going to eject with severe conditions attached and mid level circulation. Headed through the panhandle now and out to the N.E Gulf headed South West.
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Weather that hit the SE so hard today really looking like it's trying to rush to the Gulf. I know what's over Southern Georgia and Northern Florida is forecast to move east but been on a southern trajectory for awhile now. Peaked my curiosity.
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Quoting OracleDeAtlantis:
"Epic" is 3.5 million without power via a non-tropical windstorm event, striking Washington, D.C. at roughly midnight on 6/30/2012.

Today, Maryland's governor made the excuse on CNN's State of the Union, that "Unlike a polite hurricane that gives you three days of warning, this storm gave us all the impact of a hurricane without any of the warning,"

As a result, I suspect that instead of a week to get the power back on, it will be at least two weeks for most residents of the harder hit areas. My sincere and heartfelt concern go out to all those who are feeling the record heat in their darkened homes.

However, I disagree with Maryland's governor, because if someone smart in civil authority had bothered to look at my disaster forecast for Washington, D.C., published on March 5th of this year, they might have been better prepared for an event of this type and magnitude. Arguably, the what and the where were pretty obvious, and given my past writings(13 January 2012 - Post 24) about this city and the surrounding area, the when could have been suspected, as well.

Make no mistake, it's a weather forecast, and at the very end; at the very moment you suddenly recognize or suspect what you're looking at, the illumination of the city changes. Perhaps it's because there aren't any lines attached ...?









Action:
Quote
| Ignore User


Member Since: August 27, 2009 Posts: 0 Comments: 66





you are quite the toothsayer rock on and keep information automatic for the peeps
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1184. nigel20
Stay safe everyone...I'm off to bed!
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I say that ther NHC should had at least put a yellow circle in the Eastern Pacific ocean.
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That sucks. SPC expecting identical weather tomorrow for same areas. SC more than NC. and risk moves from Northern Indiana and Northern Ohio down to Southern Indiana, Kentucky, Virginia and West Virginia. This is going to be quite the run and the heat today was just as sickening. 127 humidity close to ncstorm before the storms moved in. Unreal. Be back later to see if anyone's around to chat.
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Quoting RTSplayer:
if there's any "good" news about tonight's severe weather it's that most of it appears to be Derecho-style straight line winds, rather than tornadic, rotating cells.

I doubt that'll be any consolation to anyone who has a tree fall on their house or car.

this is pretty epic in Georgia and S. Carolina, and otherwise very widespread in other parts of the S.E states.
"Epic" is 3.5 million without power via a non-tropical windstorm event, striking Washington, D.C. at roughly midnight on 6/30/2012.

Today, Maryland's governor made the excuse on CNN's State of the Union, that "Unlike a polite hurricane that gives you three days of warning, this storm gave us all the impact of a hurricane without any of the warning,"

As a result, I suspect that instead of a week to get the power back on, it will be at least two weeks for most residents of the harder hit areas. My sincere and heartfelt concern go out to all those who are feeling the record heat in their darkened homes.

However, I disagree with Maryland's governor, because if someone smart in civil authority had bothered to look at my disaster forecast for Washington, D.C., published on March 5th of this year, they might have been better prepared for an event of this type and magnitude. Arguably, the what and the where were pretty obvious, and given my past writings(13 January 2012 - Post 24) about this city and the surrounding area, the when could have been suspected, as well.

Make no mistake, it's a weather forecast, and at the very end; at the very moment you suddenly recognize or suspect what you're looking at, the illumination of the city changes. Perhaps it's because there aren't any lines attached ...?







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Just under 800 reports now for the day. Finally winding down although entire line moving into NC is still severe and may make it to the coast but hopefully won't be severe for much longer.
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Any sign development may come from the destructive land blob over the Carolina's today? They were the most intense storms of the day outside of Chicago's wind event of 90mph which was bye bye electricity for over six figures again. How many people have lost power in the SE today?
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1178. nigel20
Quoting DDR:
That's bad and with predictions of el nino,even worse.We've had an average season so far but im expecting below average rainfall here as el nino advances.

Agreed.
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1177. DDR
Quoting nigel20:

Yes, especially in the eastern end of the island. The capital city (Kingston) is suffering the most...it's a town of over 600,000 people. We usually received quite a bit of rain between May and June, but it has been pretty dry over the said period.
That's bad and with predictions of el nino,even worse.We've had an average season so far but im expecting below average rainfall here as el nino advances.
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Really cool watching it roll down towards the house but gonna turn the computer off. Will let you know in the am what the deal was. Good Night.....)
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1175. nigel20
Quoting DDR:
Nigel,you have water restrictions in Jamaica?
I didn't know that it was this bad.

Yes, especially in the eastern end of the island. The capital city (Kingston) is suffering the most...it's a town of over 600,000 people. We usually received quite a bit of rain between May and June, but it has been pretty dry over the said period.
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Another active SW day tomorrow, it's no fun, but at least many areas that needed rain badly have gotten it the last two days. At quite a cost though. Another five hundred reports maybe again tomorrow, if we're lucky. Just lovely.
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Hey folks. Went to sleep at 11:00; warm muggy day with no rain and heard some noise that woke me up. Wind was howling outside. Sudden line of t-storms popped up in Southern GA and headed into North Florida.

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1153 PM EDT SUN JUL 1 2012

AT 1152 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 34 MILES NORTHEAST OF CHATTAHOOCHEE TO 13 MILES NORTHEAST OF MONTICELLO...OR ALONG A LINE EXTENDING FROM HARRELLS STILL TO GROOVERVILLE...AND MOVING SOUTHWEST AT 25 MPH.


Nothing like the weather experienced in other parts of the US but totally unexpected this evening.
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RTS you know HARRP is just a bunch of antennas for science study. It's not militarized or anything like that. Our government would never do that. Russia and China rushing to try to gain same technology because of it's extreme implications (like all the birds and fish dying instantly seemingly in the same area down south couple years back). I respect everyone's opinions who say HARRP is not what RTS is trying to show, but I really want to do a face palm right now. To each their own. I hope people will truly seek though, and make an informed decision. Real easy to say, Conspiracy Theorist! We're programmed in America to instantly discredit conspiracy theories and most don't even know that's the case.
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1171. DDR
Nigel,you have water restrictions in Jamaica?
I didn't know that it was this bad.
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Quoting VAbeachhurricanes:


Using?


Directed energy weapons.
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Quoting RTSplayer:


Never said that.

Redirect and possibly slightly modify intensity? Definitely.

Total control? No way.


Using?
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Quoting VAbeachhurricanes:
We can't even build a model that can perfectly project weather 24 hours away yet we can control entire weather systems? Thats a stretch...


Never said that.

Redirect and possibly slightly modify intensity? Definitely.

Total control? No way.
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We can't even build a model that can perfectly project weather 24 hours away yet we can control entire weather systems? Thats a stretch...
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1166. nigel20
Quoting PedleyCA:
Good Night All - Stay Safe - Sleep Well

Same to you Pedley!
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Good Night All - Stay Safe - Sleep Well
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1164. nigel20
Quoting Tazmanian:


That about 2 to 3hrs old

I know, but the image will update automatically.
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Quoting nigel20:
Eastern Tropical Atlantic


That about 2 to 3hrs old
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1162. nigel20
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Quoting goosegirl1:


Lordy, I better scamper to the kitchen to make a new tin foil hat!


Won't help...
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Quoting KoritheMan:

Normally I find your posts highly informative and logical. But now you're stooping to baseless conjecture? Seriously dude, you're better than this.


Yes, I am, thanks, but I'm a tad bored.

Just think, if they declassified all the cold ware era stealth spy planes and bombs, what is the "classified" stuff now?

Only thing that's left is:

Cloaking fields
weather control
"stable" anti-matter
zero point
time travel

Take your pick.

The most likely things to actually exist are cloaking fields and weather control.

Military grade lasers and rail guns aren't even classified....
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Wxgeek, washingtonian and points east toward the capitol- the storm has arrived, without the same wind as two days ago. Still lots of beautiful lightening! Expect it over the next 2 hours or so.
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1158. nigel20
Eastern Tropical Atlantic
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Quoting RTSplayer:


1) My post implies only partial control.

2) The government doesn't care if a tree falls on grandma's house. They do care if a drought causes hundreds of millions or billions of dollars in damages to crops, livestock, reservoirs, or other economic assets. One billion saved > ten million lost, at least when only dollars matter.

3) I believe the HAARP facility is known to operate at least one device that uses EM to try to modify the motions of high and low pressure systems, as do several other countries have such facilities, including Russia. They have been developing this technology for decades going back to the heart of the cold war.


Lordy, I better scamper to the kitchen to make a new tin foil hat!
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Quoting WxGeekVA:


'tis another good one related to the heat and crazy storms.



I'm pretty sure Satan payed a visit to the Tampa Bay area last Sunday too. Heck we already had 6 or 7 tornadoes touch down in the area before the SPC finally sluggishly caught up and issued a tornado watch. Thankfully the NWS here did great and was all over the severe threat even though the SPC failed to see the event coming despite ridiculous helicity setting up over us Saturday night and Sunday morning. That was the first time I've ever came across freshly done tornado damage while driving around n the storm, only 2 miles from my house, crazy day indeed.
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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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