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Violent EF-5 Tornado Causes Catastrophic Damage in Moore, Oklahoma

By: Dr. Jeff Masters , 4:00 PM GMT on May 21, 2013

A massive and violent tornado 1.3 miles wide smashed through Moore, Oklahoma near 3 pm CDT Monday, causing catastrophic damage along a 17-mile long path. The National Weather Service in Norman, Oklahoma announced that it has found at least one area of EF-5 damage near Briarwood Elementary School, with winds of 200 - 210 mph. Damage was extreme and covered a huge area, and many buildings swept away down to their foundations. The tornado was on the ground for 51 minutes, from 2:45 - 3:36 pm CDT. This averages out to a 20 mph forward speed, and the tornado was initially moving even slower--20 mph. Violent tornadoes typically move considerably faster, sometimes at speeds in excess of 60 mph, and the relatively slow motion of the Moore tornado contributed to the extreme damage by exposing buildings to a longer period of violent winds than usual. A tornado warning for the storm was issued at 2:40 pm CDT, sixteen minutes before it touched down. On average, a tornado warning comes about thirteen minutes before touchdown. A tornado emergency was declared for Moore at 3:01 pm, about twenty minutes before the tornado entered the west side of the city. The debris ball from the tornado, as seen on Doppler radar, expanded to over two miles in diameter, and debris was carried over 100 miles from Moore. The National Weather Service office in Tulsa, Oklahoma reported at 4:13 pm CDT that they were "seeing reports of light tornado debris falling in the Tulsa metro area again this evening, likely from the Moore area." Tulsa is 100 miles east-northeast of Moore.


Figure 1. The Moore, Oklahoma tornado of May 20, 2013. Image credit: WIkipedia.


Figure 2. A fire burns in the Tower Plaza Addition in Moore, Oklahoma, following a tornado on Monday, May 20, 2013. Photo: Sue Ogrocki, ASSOCIATED PRESS.


Figure 3. Flipped vehicles are piled up outside the heavily damaged Moore Medical Center in Moore, Oklahoma, after a powerful tornado ripped through the area on May 20, 2013. On the enhanced Fujita Scale, the maximum degree of damage (11), indicating EF-5 winds of 210 mph, is "Significant damage to building envelope" on an institutional building like a hospital or government office. The damage to the Moore Medical Center may qualify as EF-5 damage. Image credit: Brett Deering/Getty Images)

Here is the tornado warning that was issued at 2:40 pm CDT, sixteen minutes before the tornado touched down:

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
240 PM CDT MON MAY 20 2013

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
NORTHWESTERN MCCLAIN COUNTY IN CENTRAL OKLAHOMA...
SOUTHERN OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...
NORTHEASTERN GRADY COUNTY IN CENTRAL OKLAHOMA...
NORTHERN CLEVELAND COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 315 PM CDT

* AT 238 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR NEWCASTLE...AND MOVING EAST AT 20 MPH.

IN ADDITION TO A TORNADO...LARGE DAMAGING HAIL UP TO GOLF BALL SIZE IS EXPECTED WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...NORMAN...MOORE...NEWCASTLE...BRIDGE CREEK AND VALLEY BROOK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW IN A STORM SHELTER OR AN INTERIOR ROOM OF A STURDY BUILDING. STAY AWAY FROM DOORS AND WINDOWS.


At 3:01 pm CDT, five minutes after the tornado touched down and about twenty minutes before the tornado hit the west side of Moore, the NWS issued a "Tornado Emergency" advisory:


BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
301 PM CDT MON MAY 20 2013

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
NORTHWESTERN MCCLAIN COUNTY IN CENTRAL OKLAHOMA...
SOUTHERN OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...
NORTHERN CLEVELAND COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 345 PM CDT

* AT 259 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS AND STORM SPOTTERS WERE TRACKING A LARGE AND EXTREMELY DANGEROUS TORNADO NEAR NEWCASTLE. DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST AT 20 MPH.

THIS IS A TORNADO EMERGENCY FOR MOORE AND SOUTH OKLAHOMA CITY.

IN ADDITION TO A TORNADO...LARGE DESTRUCTIVE HAIL UP TO TENNIS BALL SIZE IS EXPECTED WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...MIDWEST CITY...MOORE...NEWCASTLE...STANLEY DRAPER LAKE...TINKER AIR FORCE BASE AND VALLEY BROOK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. IF YOU CANNOT GET UNDERGROUND GO TO A STORM SHELTER OR AN INTERIOR ROOM OF A STURDY BUILDING NOW.

TAKE COVER NOW IN A STORM SHELTER OR AN INTERIOR ROOM OF A STURDY BUILDING. STAY AWAY FROM DOORS AND WINDOWS.


Figure 4. The annual number of EF-3 and stronger tornadoes, 1954 - 2012. The greatest number of these dangerous tornadoes was 131 in 1974, the year of the notorious "Super Outbreak." The minimum was just 15, set in 1987. The average is 43 per year. Image credit: NOAA.


Figure 5. Violent EF-4 and EF-5 tornadoes make up only 1% of all tornadoes, but account for well over half of all deaths. Image credit: tornadoproject.com.

A very bad tornado in an otherwise quiet year for violent tornadoes
According to NOAA, the U.S. has averaged 43 EF-3 or stronger tornadoes per year during the period 1954 - 2012. With tornado season nearly half over, we are well below the average pace for these most dangerous tornadoes--only nine EF-3 and EF-4 tornadoes have been recorded so far in 2013. An average year should have had at least fifteen of these tornadoes by this point in the year. Here are the nine EF-3 and stronger tornadoes so far in 2013:

EF-5, 200 - 210 mph winds, May 20, Moore, Oklahoma. Many deaths and injuries.
EF-4, 166 - 200 mph winds, May 19, Shawnee, Oklahoma. 2 deaths.
EF-4, 180 mph winds, May 15, Granbury, TX. 6 deaths, 24+ injuries.
EF-4, 165 - 185 mph winds, May 18, Rozel, Kansas.
EF-4, 170 mph winds, February 10, Hattiesburg, MS. 0 deaths, 82 injuries,
EF-3, 140 mph winds, May 15, Cleburne, TX. No deaths or injuries.
EF-3, 160 mph winds, January 30, Adairsville, GA. 1 death, 17 injuries, 363 buildings damaged or destroyed.
EF-3, 145 mph winds, April 11, Kemper County, AL. 1 death, 9 injuries.
EF-3, 136 - 165 mph winds, May 19, Luther - Carney, Oklahoma.

Moore tornado likely to be one of the five most damaging tornadoes in history
Moore has the unenviable distinction of having previously experienced the 4th costliest tornado in world history, the notorious May 3, 1999 Bridgecreek-Moore EF-5 tornado. There have been only six billion-dollar (2011 dollars) tornadoes in history:

1) Joplin, Missouri, May 22, 2011, $2.8 billion
2) Topeka, Kansas, June 8, 1966, $1.7 billion
3) Lubbock, Texas, May 11, 19780, $1.5 billion
4) Bridge Creek-Moore, Oklahoma, May 3, 1999, $1.4 billion
5) Xenia, Ohio, April 3, 1974, $1.1 billion
6) Omaha, Nebraska, May 6, 1975, $1 billion

The May 3, 1999 Bridge Creek-Moore tornado killed 36 people and injured 583. It damaged or destroyed 8132 homes, 1041 apartments, 260 businesses, 11 public buildings and seven churches. According to rough estimates of the size of the damaged area made by helicopters operated by news9.com and kfor.com, the damage footprint from the May 20, 2013 tornado is easily twice as large. I expect that after the damage tally from the May 20 tornado is added up, Moore will hold two of the top five spots on the list of most damaging tornadoes in history, and the May 20 tornado may approach the Joplin tornado as the costliest twister of all-time.


Figure 6. Severe weather outlook for Tuesday, May 21, calls for a "Moderate Risk" of severe weather over Northeast Texas, Southwest Arkansas, and small portions of Southeast Oklahoma and Northwest Louisiana. You can follow today's severe weather outbreak from our Severe Weather page.

Here we go again: Another big severe weather day today in the Midwest
The Moore tornado was the first of twenty tornadoes reported on May 20--the third consecutive day with twenty or more tornadoes in the Midwest. Each of these days had a "Moderate Risk" of severe weather, as advised by NOAA's Storm Prediction Center (SPC.) The SPC is calling for a fourth consecutive day with a "Moderate Risk" of severe weather today (Tuesday), with the greatest danger occurring over Northeast Texas, Southwest Arkansas, and small portions of Southeast Oklahoma and Northwest Louisiana. Once again, we can expect to see isolated supercells capable of spawning dangerous violent tornadoes during the late afternoon and early evening hours. The severe weather outbreak moves east and will begin to wind down on Wednesday, when only a "Slight Risk" of severe weather is expected over New York, Ohio, Pennsylvania, plus northern portions of Kentucky, West Virginia, and Maryland.


Video 1. Remarkable time-lapse sequence of the Moore, Oklahoma tornado on May 20, 2013, taken from a news helicopter.


Video 2. Stormchasers caught the dramatic sounds and sights of the Moore, Oklahoma tornado of May 20, 2013 as it moved through the city.


Video 3. Video of the Moore, Oklahoma tornado of May 20, 2013 taken from a smartphone as the tornado moved across an open field.

Jeff Lechus filmed this remarkable video from his car while trying to get to his son. The flying debris near his car was extremely dangerous, and he is lucky he is alive.

Wunderground's weather historian Christopher C. Burt discusses the deadliest tornadoes of all time in his April, 2011 post. Since that post, the Joplin, Missouri tornado of May 22, 2011, killed 158 people, making it the 7th deadliest tornado in history.

My post, 2011: Year of the Tornado from December 2011, detailing the remarkable tornado records set in 2011.

I saved a 10-frame animation of the radar reflectivity image from the Moore tornado here.

I greatly appreciate all the valuable links members of the WU community have posted here, and I have used many of them in my posts over the past day. Keep up the great work!

How to help
Portlight Strategies, an organization that supports disaster victims with disabilities, will be working with shelter operators and disability stakeholder organizations in Oklahoma to serve the needs of people with disabilities. Further information and how to offer additional support can be found on their website.

Donations can be made to American Red Cross disaster relief at redcross.org/weather or by texting WEATHER to 90999 to donate $10.

Donations can be made on The Salvation Army's website or by texting STORM to 80888 to donate $10. You can also call to make donations of other monetary amounts at (800) 725-2769.

Jeff Masters


The views of the author are his/her own and do not necessarily represent the position of The Weather Company or its parent, IBM.

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Beautiful and sunny the last hour or so... clouds starting to darken to the west
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Oklahoma Severe Storms and Tornadoes (DR-4117)
Incident period: May 18, 2013

Major Disaster Declaration declared on May 20, 2013

Disaster Declarations
Member Since: December 31, 1969 Posts: Comments:
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Quoting Barefootontherocks:
Yes it was. Lol I meant *knock* not know.

You'll learn a lot. Though Norman is more cosmopolitan than most of OK because of OU, whole different society and culture here.

Be careful with sunburn. Have a great summer.
...

Number for Oklahoma tornado victims to call for help - 211

Social Services... 211. They'll hook you up.

Tornado "on the ground" in Massachusetts!


Well, Dave Matthews just postponed for 24 hours the 7p Austin show tonight. That's good, get to see him in clear weather and no danger for 10K ticketholders driving in dangerous weather.
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Quoting Levi32:


Wow that was such a long time ago lol.

I'm really looking forward to learning a lot about severe thunderstorms while I'm down here. It's easily the weakest part of my meteorological knowledge base. I've never gotten into tracking severe outbreaks closely like many of you. Now that I'm physically in tornado alley I will be keeping a much closer eye on them.
Yes it was. Lol I meant *knock* not know.

You'll learn a lot. Though Norman is more cosmopolitan than most of OK because of OU, whole different society and culture here.

Be careful with sunburn. Have a great summer.
...

Number for Oklahoma tornado victims to call for help - 211

Social Services... 211. They'll hook you up.

Tornado "on the ground" in Massachusetts!
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SevereStudios‏@severestudios19 s
Rotation increasing on storm near SALADO, TX. Folks in the Temple, TX area should keep an eye on it (4:38pm)
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AccuWeather.com‏@breakingweather2 min
Storms capable of producing tornadoes moving into Columbia & Dutchess Counties, NY. Be alert for changing weather conditions.
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Quoting Astrometeor:


Well, while he did make a tornadic mistake with that thought with reference to prayers, at least he has more knowledge than most people on how tornadoes and hurricanes form and their purposes to the Earth.


What? Robertson? You are joking, right?
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SevereStudios‏@severestudios3 min
Tornado Warning for Columbia and Dutchess County in NY until 6:00pm EDT. #nywx


SevereStudios‏@severestudios3 min
Tornado Warning for Berkshire County in MA until 6:00pm EDT. #mawx


SevereStudios‏@severestudios3 min
Tornado Warning for Litchfield County in CT until 6:00pm EDT. #ctwx

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248
WFUS51 KALY 212131
TORALY
CTC005-MAC003-NYC021-027-212200-
/O.NEW.KALY.TO.W.0002.130521T2131Z-130521T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ALBANY NY
531 PM EDT TUE MAY 21 2013

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A

* TORNADO WARNING FOR...
NORTHERN LITCHFIELD COUNTY IN NORTHERN CONNECTICUT...
SOUTHWESTERN BERKSHIRE COUNTY IN WESTERN MASSACHUSETTS...
NORTHEASTERN DUTCHESS COUNTY IN EAST CENTRAL NEW YORK...
SOUTH CENTRAL COLUMBIA COUNTY IN EAST CENTRAL NEW YORK...

* UNTIL 600 PM EDT

* AT 529 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
SOUTHEAST OF COPAKE...OR 12 MILES SOUTHWEST OF GREAT
BARRINGTON... MOVING SOUTHEAST AT 15 MPH.

* THE TORNADO WILL BE NEAR...
SHEFFIELD BY 545 PM EDT...
ASHLEY FALLS BY 550 PM EDT...
CANAAN...EDDY FIELD AND FALLS VILLAGE BY 555 PM EDT...
NORFOLK BY 600 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

PLEASE REPORT HAIL SIZE...DAMAGING WINDS AND REPORTS OF TREES DOWN TO
THE NATIONAL WEATHER SERVICE BY EMAIL AT ALB.STORMREPORT@NOAA.GOV...
ON FACEBOOK AT WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.ALBANY. GOV
OR TWITTER @NWSALBANY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS
AND EASTERN NEW YORK AND SOUTHERN VERMONT.



LAT...LON 4198 7360 4217 7353 4205 7305 4204 7305
4182 7312
TIME...MOT...LOC 2131Z 283DEG 14KT 4203 7345
Member Since: December 31, 1969 Posts: Comments:
Lots of stuff going on north and east of me, looking at mostly sunny skies in Binghamton :( 
Couple of things started to look promising to my West, but nothing has stayed together yet, I just want one good thunderstorm to announce that summer is here.
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Hurricane Preparation 2013




It's time to dust off that family disaster plan, or in many cases, create one.

Keeping your family safe during a hurricane starts with proper planning. One in six Americans live along the eastern seaboard or the Gulf of Mexico, making hurricane preparation a must for many and their families.
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Quoting JeffMasters:
Note the path WIDTH of 1.3 miles.....Greensburg, KS was 1.7 miles wide: http://www.crh.noaa.gov/images/ddc/News/Greensburg /GreensburgTornadoFactSheet.pdf

NWS chat says the EF-5 damage from the Moore tornado was found at Briarwood Elementary.

Jeff Masters
Wow. According to news reports, all the children at Briarwood survived. Our now famous KFOR met Mike Morgan, who's been doing his job in OKC for 20 years, also mentioned EF5 damage around the Warren Theatre, which was left standing when everything around it was torn apart - bowling alley, medical center.

~If outside the 1.3 mi wide tornado property had damage from raining debris, how wide was the tornado really? on radar? Guess we'll see when they are done. Surveying.
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Robertson makes me cringe as a Christian. Say's some very very hateful things and makes inferences that are so ridiculous that it goes beyond explanation. To infer he knows what God is thinking behind the disasters that happen is to equate himself with God himself. Arrogant, mean spirited, and oblivious.
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a lot of comma shaped cells whipping up in southern Arkansas..
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SevereStudios‏@severestudios35 s
Possible tornado heading toward CANAAN and LAKEVILLE, CT. Take shelter. (5:26pm EDT)
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Rain coming for me in WPB
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Quoting MAweatherboy1:
Pretty good looking tornado warned storm with a confirmed tornado on the ground heading into western MA:



Tops at 40K, VIL around 70 (!!), 3in hail on radar. Passing just south of me now.
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SevereStudios‏@severestudios2 min
RT @kfor: Oklahoma Blood Institute is in need of O+ blood. Please RT.
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Quoting Patrap:
You Won't Believe what Pat Robertson is Blaming the OK Tornado on
May 21, 2013 |



Link
maybe we should email him and tell em god says to give all the money u have collected to the victims to help rebuild that would be a divine act

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Quoting SouthernIllinois:
Heads up New Madrid...

Sure the sun being out to north isn't going to help as these move up. Spfld is 87 while we and StL are around 79. Have a 67 dew pt, 29.7", 5-20 mph from S.
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Pretty good looking tornado warned storm with a confirmed tornado on the ground heading into western MA:

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AccuWeather.com‏@breakingweather1 min
A tornado was reported near Copake, NY moving E at 35 mph.
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AccuWeather.com‏@breakingweather6 min
Egg-sized hail was reported in Kinderhook, NY.
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BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ALBANY NY
457 PM EDT TUE MAY 21 2013

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A

* TORNADO WARNING FOR...
NORTHEASTERN LITCHFIELD COUNTY IN NORTHERN CONNECTICUT...
SOUTHERN BERKSHIRE COUNTY IN WESTERN MASSACHUSETTS...
EXTREME NORTHEASTERN DUTCHESS COUNTY IN EAST CENTRAL NEW YORK...
SOUTH CENTRAL COLUMBIA COUNTY IN EAST CENTRAL NEW YORK...

* UNTIL 530 PM EDT

* AT 452 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO NEAR
COPAKE...OR 12 MILES SOUTHEAST OF HUDSON...MOVING EAST AT 35 MPH.


* THE TORNADO WILL BE NEAR...
GREAT BARRINGTON BY 515 PM EDT...
SHEFFIELD...ASHLEY FALLS...EDDY FIELD AND CANAAN BY 520 PM EDT...
SANDISFIELD AND OTIS BY 530 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

PLEASE REPORT HAIL SIZE...DAMAGING WINDS AND REPORTS OF TREES DOWN TO
THE NATIONAL WEATHER SERVICE BY EMAIL AT ALB.STORMREPORT@NOAA.GOV...
ON FACEBOOK AT WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.ALBANY. GOV
OR TWITTER @NWSALBANY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS
AND EASTERN NEW YORK AND SOUTHERN VERMONT.

&&

LAT...LON 4201 7301 4203 7370 4221 7370 4224 7300
4215 7303 4214 7304 4214 7307 4212 7305
4209 7307 4204 7305 4204 7300
TIME...MOT...LOC 2057Z 270DEG 29KT 4212 7358

$$

SND/LFM
Member Since: December 31, 1969 Posts: Comments:
Good afternoon friends!

Condolences goes out to all the people that lost a love one in this terrible tornado.
Member Since: December 31, 1969 Posts: Comments:
Quoting JeffMasters:
Note the path WIDTH of 1.3 miles.....Greensburg, KS was 1.7 miles wide: http://www.crh.noaa.gov/images/ddc/News/Greensburg /GreensburgTornadoFactSheet.pdf

NWS chat says the EF-5 damage from the Moore tornado was found at Briarwood Elementary.

Jeff Masters
Doc have you ever been on the scene of tornado destruction before?
Member Since: December 31, 1969 Posts: Comments:
Currently 6 Watch boxes and 22 thunderstorm warnings in effect.
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360. JeffMasters (Admin)
Note the path WIDTH of 1.3 miles.....Greensburg, KS was 1.7 miles wide: http://www.crh.noaa.gov/images/ddc/News/Greensburg /GreensburgTornadoFactSheet.pdf

NWS chat says the EF-5 damage from the Moore tornado was found at Briarwood Elementary.

Jeff Masters
Quoting MAweatherboy1:

Heat and humidity was real bad up here today as well, until about an hour ago when the seabreeze slid through and dropped the temperature 20 degrees in minutes. Plenty of storms around up here though, with a couple severe. Rapidly changing weather day.
I envy you right now.The air is stagnant like an old attic that hasn't been touched in years it was breezy earlier now you gotta pray to get some wind.
Member Since: December 31, 1969 Posts: Comments:
Quoting Barefootontherocks:
Oh, Levi!
Gust fronts are fun. some times the almost know you over. lol

And I have to say this. I cannot believe you're headed to Norman. Wow. Who'd a thunk back when you Seahawk fan from Homer Alaska posted in the 2006 Super Bowl Party blog and you were so articulate we all thought you were and adult, and I offered you a beer.

I hope the OU campus blows you away the way it did me when I first saw the place. And the main library - to die for, if you like libraries. Enjoy your summer. If you need bail money, send me a wu mail. lol


Wow that was such a long time ago lol.

I'm really looking forward to learning a lot about severe thunderstorms while I'm down here. It's easily the weakest part of my meteorological knowledge base. I've never gotten into tracking severe outbreaks closely like many of you. Now that I'm physically in tornado alley I will be keeping a much closer eye on them.
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AccuWeather.com‏@breakingweather2 min
T-storm winds in Harrodsburg and Shopville, KY reportedly knocked several trees down.
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Quoting washingtonian115:
Humidity is awful here today.With temps in the upper 80's.Good thing no storms are around to feed off on this.

Heat and humidity was real bad up here today as well, until about an hour ago when the seabreeze slid through and dropped the temperature 20 degrees in minutes. Plenty of storms around up here though, with a couple severe. Rapidly changing weather day.
Member Since: December 31, 1969 Posts: Comments:
Quoting Astrometeor:
Well, while he did make a tornadic mistake with that thought with reference to prayers, at least he has more knowledge than most people on how tornadoes and hurricanes form and their purposes to the Earth.
Yeah, I'd rank Robertson as the 6,945,084,231st most knowledgeable person on earth when it comes to tornadoes and hurricanes and their purposes to the Earth pretty much anything. What a buffoon...
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Quoting calkevin77:
91 degrees and still holding a dew point of ~71 in my area. Pressure is now slowly starting to drop so the Austin area might start seeing some small cells popping up in an hour or so.


88 in Cedar Park. Winds have died down a bit, but are still out of the west/southwest. Tons of moisture in the air.
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More detail for anyone who missed it earlier:

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
250 PM CDT TUE MAY 21 2013

...NWS DAMAGE SURVEY FOR 5/20/2013 NEWCASTLE/MOORE TORNADO EVENT -
UPDATE 3...

...NWS DAMAGE SURVEY HAS NOW RATED THE NEWCASTLE/MOORE TORNADO AS EF5...

.OVERVIEW...

THE NATIONAL WEATHER SERVICE DISPATCHED FOUR DAMAGE SURVEY TEAMS TO
THE PATH OF THE NEWCASTLE/MOORE OK TORNADO. NEW STATEMENTS WILL BE
ISSUED THROUGHOUT THE DAY AS THESE TEAMS REPORT FINDINGS. THIS
INFORMATION REMAINS PRELIMINARY AND THE INFORMATION HERE COULD
CHANGE.

.NEWCASTLE/MOORE TORNADO

RATING: EF5
ESTIMATED PEAK WIND: 200-210 MPH
PATH LENGTH /STATUTE/: 17 MILES
PATH WIDTH /MAXIMUM/: 1.3 MILES
FATALITIES: N/A
INJURIES: N/A

START DATE: MAY 20 2013
START TIME: 2:45 PM CDT
START LOCATION: 4.4 W NEWCASTLE /GRADY COUNTY /OK
START LAT/LON: 35.2580 / -97.6775

END DATE: MAY 20 2013
END TIME: 3:35 PM CDT
END LOCATION: 4.8 E OF MOORE OK /CLEVELAND COUNTY /OK
END LAT/LON: 35.3409 / -97.4007


SURVEY SUMMARY: EXPERTS SURVEYING IN MOORE HAVE DETERMINED DAMAGE IS
EF5 WITH MAXIMUM WINDS OVER 200 MPH. FOUR SURVEY TEAMS CONTINUE TO
INSPECT DAMAGE FROM THIS LONG TRACK TORNADO. INITIAL DAMAGE WAS
FOUND AROUND 4.4 MILES WEST OF NEWCASTLE...SOUTH OF TECUMSEH ROAD
ALSO KNOWN AS NW 16TH STREET AND EAST LAKE ROAD. THE TORNADO TRACKED
NE TO THE INTERSTATE 44 BRIDGE OVER THE CANADIAN RIVER AND THEN TOOK
A MORE EASTWARD TRACK THROUGH MOORE. TORNADO DAMAGE ABRUPTLY ENDS
0.3 MILES EAST OF AIR DEPOT ROAD AND N OF SE 134TH ST.

INITIALLY PRODUCING EF0 AND EF1 DAMAGE THE STORM INTENSIFIED VERY
RAPIDLY IN 4 MILES OR AROUND 10 MINUTES PRODUCING EF4 DAMAGE BEFORE
REACHING INTERSTATE 44. NUMEROUS INDICATIONS OF EF4 DAMAGE WITH SOME
AREAS NOW DETERMINED AT EF5 DAMAGE...THE HIGHEST CATEGORY ON THE EF
SCALE...WITH OVER 200 MPH WINDS.

ADDITIONAL INFORMATION SUCH AS MAXIMUM PATH WIDTH WILL BE UPDATED
AS THE TEAMS COMPLETE THEIR SURVEYS.
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Quoting Barefootontherocks:
Oh, Levi!
Gust fronts are fun. some times the almost know you over. lol

And I have to say this. I cannot believe you're headed to Norman. Wow. Who'd a thunk back when you Seahawk fan from Homer Alaska posted in the 2006 Super Bowl Party blog and you were so articulate we all thought you were and adult, and I offered you a beer.

I hope the OU campus blows you away the way it did me when I first saw the place. And the main library - to die for, if you like libraries. Enjoy your summer. If you need bail money, send me a wu mail. lol

Of us storm chasin' mamas, juslivn, is the expert on derecho (and #Minnesota trash talk). She rarely comments here because, well, she's smarter than me. I'll stab at an answer...
No. Completely different storm mode. Squall line mode can produce tornadoes but a true derecho does not.
Thank's!!!
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Cat 6 lead authors: WU cofounder Dr. Jeff Masters (right), who flew w/NOAA Hurricane Hunters 1986-1990, & WU meteorologist Bob Henson, @bhensonweather

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