Dangerous tornado outbreak expected Saturday; Gulf of Mexico SSTs warmest on record

By: Dr. Jeff Masters , 2:57 PM GMT on April 13, 2012

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A dangerous tornado outbreak is expected on Saturday over the Plains, says NOAA's Storm Prediction Center (SPC). Warm, moist air flowing northwards from a Gulf of Mexico that has record-warm waters will collide with cold air funneling down from Canada, creating a highly unstable air mass capable of creating strong thunderstorm updrafts. An impressive upper-level low, accompanied by a jet stream with 105 - 125 mph winds at middle levels of the atmosphere, will create plenty of wind shear, giving the air the spin it needs to form tornadoes. SPC has has issued their highest level of alert, a "High Risk," for much of Oklahoma, Kansas, and Nebraska for Saturday. Included in the "High Risk" area are the cities of Wichita, Oklahoma City, and Lincoln. This is the second time SPC has issued a "High Risk" forecast this year; the first "High Risk" forecast came for the March 2 tornado outbreak, which killed 41 people and did $1.5 - $2 billion in damage. It is very unusual for SPC to issue a "High Risk" forecast more than a day in advance of a suspected tornado outbreak; according to Wikipedia, today's "High Risk" forecast is only the second time SPC has ever done this. The other instance was for the April 6 - 8, 2006 tornado outbreak focused over Tennessee, which generated 73 tornadoes that killed 13 and did $1.5 billion in damage. People living in the threatened area need to pay close attention on Saturday to this dangerous severe weather situation.


Figure 1. Severe weather risk for Saturday, April 14, 2012, from NOAA's Storm Prediction Center.

Gulf of Mexico water temperatures the warmest on record
Temperatures in the states bordering the Gulf of Mexico were the 3rd - 7th warmest on record during the first three months of 2012, according to NOAA's National Climatic Data Center. This allowed Sea Surface Temperatures (SSTs) in the Gulf of Mexico (25 - 30°N, 85 - 90°W) to climb to 1.4°C (2.5°F) above average during March 2012, according to a wunderground analysis of the Hadley Centre SST data set. This is the warmest March value on record for the Gulf of Mexico, going back over a century of record keeping. During the first two weeks of April, Gulf of Mexico waters remained about 1.5°C above average, putting April on pace to have the warmest April water temperatures on record. Only one year in the past century has had April water temperatures in the Gulf of Mexico more than 1.1°C above average; that year was 2002 (1.4°C above average.) All that record-warm water is capable of putting record amounts of water vapor into the air, since evaporation increases when water is warmer. Because moist air is less dense than dry air, this warm, moist air flowing northwards from the Gulf of Mexico into the developing storm system over the Plains will be highly unstable once it encounters cold, dry air aloft. The record-warm waters of the Gulf of Mexico are a key reason for the high risk of severe weather over the Plains this weekend.


Figure 2. Departure of Sea Surface Temperature (SST) from average for April 12, 2012, as computed by NOAA/NESDIS. SSTs in the Gulf of Mexico are at their warmest levels on record for this time of year.

Follow Weather Underground on twitter for the latest on this potential severe weather outbreak.

Jeff Masters

April Storms (llpj04)
this storm greeted me as I came out of the grocery store, chased me home and got to my driveway the same time I did.
April Storms
Lightning Up the Pond - Oklahoma (mbryan777)
Last night we had a pretty spectacular lightning storm. I put the camera on the tripod in time-lapse mode and laid on my back on the hillside above the pond taking in an amazing show. When it got more exciting than I was comfortable with, I ran for the house.
Lightning Up the Pond - Oklahoma

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Quoting ScottLincoln:

Ratings above F5 were not used operationally, even with the old scale.

Be careful not to confuse shear and actual wind speed. For an actual measured speed of "210+mph winds, you would need an actual pixel of about +180kts or -180kts. That is difficult to measure with doppler radar because it would be several times past the nyquist velocity and could only be displayed as a dealiased/reconstructed value.
But, @wxbrad on twitter, a very well respected person, just tweeted he got 207.2 mph wind scan. It's not coming from me.
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This is an EF5...

Member Since: July 6, 2010 Posts: 113 Comments: 32856
Quoting washingtonian115:
I just got in the door.What's happening.


Rough summary of what I got since I got on here tonight...

(1) I heard of a tornado in Dacoma...
(2) Well SE of Dodge City...tornado headed first toward Greensburg, KS. Passed just NW of Greensburg and was spotted at night. It then moved thru Fellsburg...heading toward trousdale...belpre, macksville. A tornado emergency was issued for macksville.
(3) East Reno County Kansas (Hutchinson area)...now heading NE toward Hillsboro & passing NW of Marion. Now passing south of Herington.
(4) Wynona OK tornado, which moved toward salina-Manchseter area of Oklahoma (News9 converage with dramatic footage including explosion of gas tank & multiple vortices?). Before heading toward Manchester, passed just N of Byron. After passing just NW of Manchester, it moved across Oklahoma border into south-central Kansas. It is making a bee-line to southern Witchita, KS.
(5) Bow echo in Iowa with rotation near Des Moines...bow echo continues east with no tornado warnings.
(6) Alva/Cherokee ciruclaiton heading toward Witchita,KS. This circulation was overtaken by tornado that crossed the border frm Manchester, OK before it had a chance to get to Witchita.
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1904. LargoFl
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
914 PM CDT SAT APR 14 2012

NEC129-181-150230-
/O.CON.KGID.SV.W.0044.000000T0000Z-120415T0230Z/
NUCKOLLS NE-WEBSTER NE-
914 PM CDT SAT APR 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
WEBSTER AND WESTERN NUCKOLLS COUNTIES UNTIL 930 PM CDT...

AT 909 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
BOSTWICK...OR 35 MILES SOUTH OF HASTINGS...MOVING NORTHEAST AT 60
MPH.

LOCATIONS IMPACTED INCLUDE...
NELSON AND LAWRENCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4001 9811 4001 9841 4035 9824 4035 9811
4029 9793
TIME...MOT...LOC 0214Z 203DEG 51KT 4017 9817
WIND...HAIL 60MPH 1.75IN

$$

ADO
Member Since: August 6, 2011 Posts: 4 Comments: 42264
3/4 of a mile wide tornado near Sumner.


R5 Sumner KS 63 dBZ 42,000 ft. 34 kg/m² 70% Chance 100% Chance 1.75 in. 29 knots SW (231)

All of these are other confirmed tornadoes.


0 A4 Franklin NE 70 dBZ 38,000 ft. 66 kg/m² 100% Chance 100% Chance 3.25 in. 51 knots SW (221)

0 I8 Harper KS 48 dBZ 10,000 ft. 5 kg/m² 0% Chance 0% Chance 0.00 in. 31 knots SSW (204)

0 F0 Harper KS 47 dBZ 7,000 ft. 3 kg/m² 0% Chance 0% Chance 0.00 in. 29 knots SSW (206)
Member Since: January 25, 2012 Posts: 33 Comments: 1520
Quoting Chicklit:
Tornado emergency for Macksville...

... A Tornado Warning remains in effect for eastern Edwards... southeastern Pawnee... northwestern Pratt and Stafford counties until 915 PM CDT...

At 859 PM CDT... National Weather Service Doppler radar indicated very strong rotation associated with a confirmed large and extremely dangerous tornado 3 miles south of Macksville. This tornadic storm was moving northeast at 55 mph. Dangerous and extremely destructive hail up to softball size is also expected with this storm.

Locations impacted include...
Macksville...
Dillwyn...
St. John...
Seward...
mainly rural areas of eastern Edwards... northwestern Pratt...
southeastern Pawnee and Stafford counties.

Precautionary/preparedness actions...

To repeat... a large... extremely dangerous and potentially deadly tornado is confirmed! To protect your life... take cover now. Move to an interior room on the lowest floor of a sturdy building. Avoid
windows. If in a Mobile home... a vehicle or outdoors... move to the closest substantial shelter and protect yourself from flying debris.

Tornadoes at night are especially dangerous. Do not wait until you see or hear the tornado... it may be too late. Take cover now!


Lat... Lon 3773 9902 3774 9926 3782 9931 3827 9900
3827 9847 3826 9847 3795 9847
time... Mot... loc 0200z 224deg 50kt 3793 9897
hail 4.25in



I hope the people in Mackville are in underground bunkers, they are looking down the barrel of a one big and powerful gun
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1901. LargoFl
Quoting hurricanehunter27:
Mother nature just went postal.
man your sure right there, this night may go down in the history books
Member Since: August 6, 2011 Posts: 4 Comments: 42264
3/4 of a mile wide!
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3/4 mile wide tornado headed toward Milan, KS according to life feed.
Link
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3/4 mile wide :
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Three quarters of a mile wide tornado.
Member Since: July 6, 2010 Posts: 113 Comments: 32856
Quoting JTDailyUpdate:
Anybody in the front of the track of the Greenburg tornado should get underground
A TORNADO IS CONFIRMED TO BE ON THE GROUND
Not just 1 but two. Two strong tornadoes on the same cell.
Member Since: July 22, 2010 Posts: 1 Comments: 3852
Bow echo keeps looking worse and worse as well.

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Quoting CybrTeddy:


F6

Referring to the old scale.

That's not important right now, Macksville is in huge trouble.

Ratings above F5 were not used operationally, even with the old scale.
Quoting Bluestorm5:
2 extremely strong tornado, one near Manchester with 228-300 knots gate to gate. Another missed Greensburg by 2 miles, but appears to hit Macksville, Kansas. That tornado got scan of 210+ mph winds with movement of 80 mph and softball sized hail. Tornado emergency for Macksville as we speak.

Be careful not to confuse shear and actual wind speed. For an actual measured speed of "210+mph winds, you would need an actual pixel of about +180kts or -180kts. That is difficult to measure with doppler radar because it would be several times past the nyquist velocity and could only be displayed as a dealiased/reconstructed value.
Member Since: Posts: Comments:
1893. LargoFl
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA KS
901 PM CDT SAT APR 14 2012

KSC077-191-150230-
/O.CON.KICT.TO.W.0028.000000T0000Z-120415T0230Z/
SUMNER KS-HARPER KS-
901 PM CDT SAT APR 14 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN HARPER AND
SOUTHWESTERN SUMNER COUNTIES UNTIL 930 PM CDT...

AT 856 PM CDT...A CONFIRMED LARGE AND EXTREMELY DANGEROUS TORNADO WAS
LOCATED JUST NORTHWEST OF BLUFF CITY...AND MOVING NORTHEAST AT 40
MPH.

THIS IS A PARTICULARLY DANGEROUS SITUATION.

HAZARD...DAMAGING TORNADO.

SOURCE...RADAR CONFIRMED TORNADO.

IMPACT...MAJOR HOUSE AND BUILDING DAMAGE LIKELY AND COMPLETE
DESTRUCTION POSSIBLE. NUMEROUS TREES SNAPPED. MAJOR POWER
OUTAGES IN PATH OF TORNADO HIGHLY LIKELY. SOME ROADS
POSSIBLY BLOCKED BY TORNADO DEBRIS. COMPLETE DESTRUCTION OF
VEHICLES LIKELY.

LOCATIONS IMPACTED INCLUDE...
CALDWELL...ARGONIA...FREEPORT AND MILAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A LARGE...EXTREMELY DANGEROUS AND POTENTIALLY DEADLY
TORNADO IS ON THE GROUND. TO PROTECT YOUR LIFE...TAKE COVER NOW. MOVE
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 3700 9778 3699 9811 3706 9816 3740 9774
3703 9749 3699 9769 3699 9777
TIME...MOT...LOC 0200Z 223DEG 33KT 3713 9791

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...SIGNIFICANT
HAIL...2.75IN

$$

KLEINSASSER
Member Since: August 6, 2011 Posts: 4 Comments: 42264
Quoting TropicalAnalystwx13:
What is this nonsense?!



Left cell looks stronger but thee right is one of the better of the day!! This is insane!!
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The big three:

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Quoting TropicalAnalystwx13:
What is this nonsense?!

Mother nature just went postal.
Member Since: July 22, 2010 Posts: 1 Comments: 3852
Quoting Bluestorm5:
2 extremely strong tornado, one near Manchester with 228-300 knots gate to gate. Another missed Greensburg by 2 miles, but appears to hit Macksville, Kansas. That tornado got scan of 210+ mph winds with movement of 80 mph and softball sized hail. Tornado emergency for Macksville as we speak.
Someone is in trouble tonight...
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1888. skook
2 tornados on the ground in harper county ks, (confirmed) according to KSN tvLink
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Quoting TropicalAnalystwx13:
What is this nonsense?!



Confirmed two tornadoes with that storm.

EDIT- 3/4 mile wide tornado!
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Confirmed Tornado has hit a Hospital in Iowa...
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1885. redux
why do they put a camera guy behind the scenes in the weather services shop? what value did that just add?

the guy is busy doing his job, and then he has to answer questions like " is this storm going to hit us?"

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1884. ncstorm
TWC said the storm looks to be heading towards south of wichita, ks but the storm has been wobbling..I caught the tail end of that interview but I think Mike Siedel is at the NWS in Wichita. They are so calm right now.
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Two large, damaging tornadoes next to each other. Anything in the path of these are being destroyed.
Member Since: July 6, 2010 Posts: 113 Comments: 32856
Anybody in the front of the track of the Greenburg tornado should get underground
A TORNADO IS CONFIRMED TO BE ON THE GROUND
Member Since: Posts: Comments:
Tornado emergency for Macksville...

... A Tornado Warning remains in effect for eastern Edwards... southeastern Pawnee... northwestern Pratt and Stafford counties until 915 PM CDT...

At 859 PM CDT... National Weather Service Doppler radar indicated very strong rotation associated with a confirmed large and extremely dangerous tornado 3 miles south of Macksville. This tornadic storm was moving northeast at 55 mph. Dangerous and extremely destructive hail up to softball size is also expected with this storm.

Locations impacted include...
Macksville...
Dillwyn...
St. John...
Seward...
mainly rural areas of eastern Edwards... northwestern Pratt...
southeastern Pawnee and Stafford counties.

Precautionary/preparedness actions...

To repeat... a large... extremely dangerous and potentially deadly tornado is confirmed! To protect your life... take cover now. Move to an interior room on the lowest floor of a sturdy building. Avoid
windows. If in a Mobile home... a vehicle or outdoors... move to the closest substantial shelter and protect yourself from flying debris.

Tornadoes at night are especially dangerous. Do not wait until you see or hear the tornado... it may be too late. Take cover now!


Lat... Lon 3773 9902 3774 9926 3782 9931 3827 9900
3827 9847 3826 9847 3795 9847
time... Mot... loc 0200z 224deg 50kt 3793 9897
hail 4.25in

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What is this nonsense?!

Member Since: July 6, 2010 Posts: 113 Comments: 32856
1878. MZT
This is some insane stuff. It's more like the whole cell just rotates down onto the ground than a mere funnel descending out of it.
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Quoting WxGeekVA:


The cell is splitting... Now probably 2 separate tornadoes on the ground near Saint John and Macksville...


It looks like the two rotation icons you are seeing there are due to substantial radar dealias failures. There still appears to be only one major circulation, and maybe one smaller, weaker one. The storm near Macksville is still the real, large rotation, at least for now.
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Quoting ScottLincoln:


No. EF5 is winds of 200mph , and as such, there is no upper bound. EF5 is the highest a tornado can be rated, even if it were determined that winds were 400mph.


F6

Referring to the old scale. I even pointed out earlier that the EF5 is 200mph

That's not important right now, Macksville is in huge trouble.
Member Since: July 8, 2005 Posts: 259 Comments: 24578
Quoting Jedkins01:


Link
He was talking about the F scale not EF.
Member Since: July 22, 2010 Posts: 1 Comments: 3852
Quoting RTSplayer:


It's never been confirmed on Earth.

But the rating scale has no theoretical limit, it goes up to at least F12...

But there has never been an confirmed F6 on Earth.

Even the Moore tornado does not qualify...


It could easily happen elsewhere in the solar system, we just don't have the technology to measure it yet.


There are thousand mile per hour vortices on Uranus and Neptune, for example.


Just imputing my two cents here, but according to the original Fuijita scale a F12 would have a speed of 738 mph, also known as Mach 1 or the speed of sound
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Quoting RTSplayer:



Fujita scale up to F12
Quoting RTSplayer:



Fujita scale up to F12


Link
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Quoting hurricanehunter27:
Is this even possible?


2 tornadoes
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Quoting washingtonian115:
I just got in the door.What's happening.
2 extremely strong tornado, one near Manchester with 228-300 knots gate to gate. Another missed Greensburg by 2 miles, but appears to hit Macksville, Kansas. That tornado got scan of 210+ mph winds with movement of 80 mph and softball sized hail. Tornado emergency for Macksville as we speak.
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1870. LargoFl
FLASH FLOOD WARNING
IAC039-053-117-125-135-159-175-181-150800-
/O.NEW.KDMX.FF.W.0005.120415T0155Z-120415T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000 Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
855 PM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
CLARKE COUNTY IN SOUTH CENTRAL IOWA...
EASTERN UNION COUNTY IN SOUTH CENTRAL IOWA...
LUCAS COUNTY IN SOUTH CENTRAL IOWA...
NORTHEASTERN RINGGOLD COUNTY IN SOUTH CENTRAL IOWA...
NORTHERN DECATUR COUNTY IN SOUTH CENTRAL IOWA...
NORTHWESTERN MONROE COUNTY IN SOUTH CENTRAL IOWA...
SOUTHERN MARION COUNTY IN SOUTH CENTRAL IOWA...
SOUTHERN WARREN COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 300 AM CDT SUNDAY

* AT 855 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. SOME OF THESE STORMS ARE CAPABLE OF PRODUCING
RAINFALL AMOUNTS OF 3 INCHES OR MORE PER HOUR.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CHARITON AND OSCEOLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. TURN AROUND...DONT DROWN.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 4110 9432 4130 9287 4100 9287 4078 9432

$$

ZOGG
Member Since: August 6, 2011 Posts: 4 Comments: 42264
Well, whatever F or EF it is, it's coming up on Saint John and a big intersection.
Member Since: January 25, 2012 Posts: 33 Comments: 1520
I wonder if the tornado split while it was on the ground. That would be something.
Member Since: July 22, 2010 Posts: 1 Comments: 3852
Quoting TropicalAnalystwx13:
EVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DODGE CITY KS
900 PM CDT SAT APR 14 2012

KSC047-145-151-185-150215-
/O.CON.KDDC.TO.W.0030.000000T0000Z-120415T0215Z/
STAFFORD KS-PRATT KS-PAWNEE KS-EDWARDS KS-
900 PM CDT SAT APR 14 2012

...TORNADO EMERGENCY FOR MACKSVILLE...

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN EDWARDS...
SOUTHEASTERN PAWNEE...NORTHWESTERN PRATT AND STAFFORD COUNTIES UNTIL
915 PM CDT...

AT 859 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY
STRONG ROTATION ASSOCIATED WITH A CONFIRMED LARGE AND EXTREMELY
DANGEROUS TORNADO 3 MILES SOUTH OF MACKSVILLE. THIS TORNADIC STORM
WAS MOVING NORTHEAST AT 55 MPH. DANGEROUS AND EXTREMELY DESTRUCTIVE
HAIL UP TO SOFTBALL SIZE IS ALSO EXPECTED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MACKSVILLE...
DILLWYN...
ST. JOHN...
SEWARD...
MAINLY RURAL AREAS OF EASTERN EDWARDS...NORTHWESTERN PRATT...
SOUTHEASTERN PAWNEE AND STAFFORD COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A LARGE...EXTREMELY DANGEROUS AND POTENTIALLY DEADLY
TORNADO IS CONFIRMED! TO PROTECT YOUR LIFE...TAKE COVER NOW. MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR THE TORNADO...IT MAY BE TOO LATE. TAKE COVER NOW!

&&

That's the old Greensburg storm



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Imagine an F12 super sonic tornado!
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These cities are about to get wiped off the map.

Member Since: July 6, 2010 Posts: 113 Comments: 32856
Quoting CybrTeddy:


Hypothetically, it would have >319 mph event.


No. EF5 is winds of 200mph+, and as such, there is no upper bound. EF5 is the highest a tornado can be rated, even if it were determined that winds were 400mph.
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Quoting washingtonian115:
I just got in the door.What's happening.
Absolute craziness.
Member Since: July 22, 2010 Posts: 1 Comments: 3852


The cell is splitting... Now probably 2 separate tornadoes on the ground near Saint John and Macksville...
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MACKSVILLE, KANSAS NEED TO GET UNDERGROUND ASAP!!!!! THIS IS TORNADO EMERGENCY!!!!! THIS TORNADO IS EXTREMELY DANGEROUS!!!!!
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Quoting CybrTeddy:


Hypothetically, it would have >319 mph event.


Hypothetically and scientifically are 2 different things :)
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1859. LargoFl
SEVERE THUNDERSTORM WARNING
IAC031-115-139-163-ILC131-161-150300-
/O.NEW.KDVN.SV.W.0011.120415T0203Z-120415T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
903 PM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN CEDAR COUNTY IN EAST CENTRAL IOWA...
EASTERN MUSCATINE COUNTY IN EAST CENTRAL IOWA...
SOUTHWESTERN SCOTT COUNTY IN EAST CENTRAL IOWA...
NORTHERN MERCER COUNTY IN NORTHWEST ILLINOIS...
SOUTHWESTERN ROCK ISLAND COUNTY IN NORTHWEST ILLINOIS...
EASTERN LOUISA COUNTY IN SOUTHEAST IOWA...

* UNTIL 1000 PM CDT.

* AT 900 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL.
THIS STORM WAS LOCATED APPROXIMATELY NEAR WAPELLO...AND MOVING
NORTHEAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TOOLESBORO...GRANDVIEW...NEW BOSTON...FRUITLAND...MANNON...JOY...
ELIZA...MUSCATINE...MILLERSBURG...ALEDO...ILLINOIS CITY...
FAIRPORT...HAMLET...MATHERVILLE...REYNOLDS...MONTP ELIER...DURANT...
TAYLOR RIDGE...ANDALUSIA...BUFFALO...BLUE GRASS...SHERRARD AND OAK
GROVE.

THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 276 AND 278.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.

&&

LAT...LON 4166 9094 4133 9043 4131 9043 4107 9110
4107 9118 4119 9130
TIME...MOT...LOC 0203Z 231DEG 44KT 4118 9113
WIND...HAIL <58MPH 1.50IN

$$

NICHOLS
Member Since: August 6, 2011 Posts: 4 Comments: 42264
Quoting skook:
Link


Link for live coverage from Wichita.


Thanks!
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Is this even possible?
Member Since: July 22, 2010 Posts: 1 Comments: 3852

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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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JeffMasters's Recent Photos

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