Memorial Day Weekend Outbreak 2008

[CrazyC83]

MESOSCALE DISCUSSION 1003
NWS STORM PREDICTION CENTER NORMAN OK
0217 PM CDT SAT MAY 24 2008

AREAS AFFECTED...CNTRL/ERN NEB AND SCNTRL/SERN SD

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 241917Z - 242115Z

THOUGH THE LARGER SCALE MID-LEVEL WAVE HAS MOVED NWD INTO THE NRN
PLAINS...VSBL SATL SEEMS TO SUGGEST EVIDENCE OF A SUB-SYNOPTIC WAVE
MOVING INTO NCNTRL NEB. TO THE S OF THIS WAVE...WSW LOW-LEVEL FLOW
WAS ADVECTING DRIER AIR NEWD INTO CNTRL NEB. TO THE E...LOW-LEVEL
MOISTURE HAS BEEN SLOW TO RECOVER FROM OVERNIGHT TSTMS...BUT A
TONGUE OF LWR-MID 60S DEW POINTS WAS MOVING INTO THE GRAND ISLAND
AREA AT 19Z WITH LWR 60S TO THE SD BORDER. RUC SOUNDINGS SUGGEST
THAT A CAP STILL EXISTS OVER THE REGION AND IT WILL LIKELY TAKE
SEVERAL MORE DEGREES RISE IN TEMPERATURES/DEW POINT TO ERASE CINH.
BUT... THE COMBINATION OF INCREASE CONVERGENCE...OWING TO INCREASED
WLY MOMENTUM OVER CNTRL NEB...AND HEATING ALONG WRN EDGE OF THE
DEEPER MOIST BOUNDARY LAYER MAY LEAD TO INITIATION BETWEEN 21-23Z
OVER PORTIONS OF CNTRL/ERN NEB INTO SCNTRL SD.

THE MID-LEVEL SWLY FLOW WILL PROBABLY WEAKEN THROUGH THE
EVENING...BUT GIVEN MAINTENANCE OF A STRONG SLY LLJ...SUFFICIENT
VERTICAL SHEAR WILL SUPPORT SUPERCELLS WITH LARGE HAIL. TORNADOES
WILL ALSO BE POSSIBLE PARTICULARLY IF STORMS CAN BECOME
ESTABLISHED...REMAIN DISCRETE AND MOVE INTO ERN NEB AND SCNTRL/SERN
SD THIS EVENING.

..RACY.. 05/24/2008


ATTN...WFO...FSD...OAX...ABR...GID...LBF...UNR...

42640015 43679928 43899817 43519733 42829684 42039663
41329680 40899718 40709745 40509798 40379868 40499914
40759914 41139905 41629911 42279959

[RL3AO]

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
229 PM CDT SAT MAY 24 2008

OKC047-073-242000-
/O.CON.KOUN.TO.W.0053.000000T0000Z-080524T2000Z/
KINGFISHER OK-GARFIELD OK-
229 PM CDT SAT MAY 24 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
SOUTHWESTERN GARFIELD AND NORTHWESTERN KINGFISHER COUNTIES...

AT 229 PM CDT...DOPPLER RADAR AND STORM SPOTTERS OBSERVED A TORNADO 9
MILES ALONG HIGHWAY 51 BETWEEN LACEY AND HENNESSEY...MOVING
NORTHEAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE LACEY.

[RL3AO]

AT 234 PM CDT...DOPPLER RADAR AND STORM SPOTTERS OBSERVED A TORNADO
WITH STRONG TO VIOLENT ROTATION 10 MILES SOUTHEAST OF AMES...OR VERY
CLOSE TO LACEY... MOVING EAST AT 14 MPH.

[CrazyC83]

Here we go again! Moderate risk at 2000Z?

[RL3AO]

Turn on CNN if you have it. A helicopter is on the cell!

[RL3AO]

It hit a barn. Strong EF2 at least.

[RL3AO]

It redeveloped and touched down for about 15 seconds. Lifted again. Still a funnel.

[CrazyC83]

SEL8

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 348
NWS STORM PREDICTION CENTER NORMAN OK
240 PM CDT SAT MAY 24 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

LARGE PART OF CENTRAL AND EASTERN SOUTH DAKOTA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHWEST OF
MOBRIDGE SOUTH DAKOTA TO 55 MILES SOUTH OF CHAMBERLAIN SOUTH
DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 346...WW 347...

DISCUSSION...STRONG TROUGH/MID LEVEL JET MAX ROTATING NEWD ACROSS
SD. AIR MASS IS RAPIDLY DESTABILIZING NWD AHEAD OF COLD FRONT WRN
SD. THUNDERSTORMS WILL INCREASE IN NUMBER/INTENSITY WITH POTENTIAL
FOR SUPERCELLS. LARGE HAIL AND POSSIBLE TORNADOS PARTICULARLY
ASSOCIATED WITH ANY SUPERCELL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 23040.


...HALES

[Brent]

WOW, this video is amazing.

[Bunkertor]

Here we go again! Moderate risk at 2000Z?

I hold !

[RL3AO]

This is amazing! Get to CNN if you can!

[CrazyC83]

MESOSCALE DISCUSSION 1005
NWS STORM PREDICTION CENTER NORMAN OK
0248 PM CDT SAT MAY 24 2008

AREAS AFFECTED...NRN/CNTRL OK

CONCERNING...TORNADO WATCH 347...

VALID 241948Z - 242115Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 347 CONTINUES.

TORNADIC SUPERCELL OVER EXTREME NWRN KINGFISHER COUNTY HAS LIKELY
LATCHED ONTO THE OVERNIGHT OUTFLOW BOUNDARY WITH PRONOUNCED ESELY
LOW-LEVEL FLOW BOOSTING 0-1KM SRH TO NEAR 200 M2/S2. 18Z NORMAN
SOUNDING WAS UNCAPPED AND EXHIBITED MLCAPE TO 2500 J/KG. EXPECT
THAT THE LOW-LEVEL CONVERGENCE ZONE ALONG A PORTION OF THE
LEE-TROUGH WILL SERVE AS A FOCUS FOR DEVELOPING TSTMS FROM
MAJOR/GARFIELD COUNTIES SWD INTO NRN CADDO COUNTIES FOR SEVERAL MORE
HOURS. AS STORMS MOVE OFF THE CONVERGENCE ZONE...MINIMAL
MLCINH...STRONG INSTABILITY AND ZONE OF ENHANCED LOW-LEVEL SRH WILL
KEEP THE TORNADO AND LARGE HAIL THREATS ALIVE FOR SEVERAL MORE HOURS
ACROSS NRN AND A PORTION OF CNTRL OK. HIGHEST TORNADO POTENTIAL
SHOULD EXIST FROM KINGFISHER/GARFIELD COUNTIES ESEWD TOWARD PAWNEE
AND NRN PAYNE COUNTIES THROUGH 22Z.

..RACY.. 05/24/2008


ATTN...WFO...TSA...OUN...

35769879 36399907 36949846 36889693 36609629 35959599
35399597 35159669 35209785 34969838 34899889 35049923
35459896

[Bunkertor]

Awesome

[CrazyC83]

Tornado looks capable of solid EF2-EF3 damage...

[Extremeweatherguy]

crazy footage on CNN!

[CrazyC83]

TORNADO WARNING
OKC047-073-242030-
/O.NEW.KOUN.TO.W.0054.080524T1947Z-080524T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
247 PM CDT SAT MAY 24 2008

THE NATIONAL WEATHER SERVICE IN NORMAN HAS EXTENDED THE

* TORNADO WARNING FOR...
NORTHERN KINGFISHER COUNTY IN CENTRAL OKLAHOMA...
SOUTHERN GARFIELD COUNTY IN NORTHERN OKLAHOMA...

* UNTIL 330 PM CDT

* AT 247 PM CDT...DOPPLER RADAR AND STORM SPOTTERS OBSERVED A TORNADO
10 MILES SOUTHWEST OF BISON...MOVING EAST NORTHEAST AT 14 MPH.

* LOCATIONS IN THE WARNING INCLUDE BISON.

IN ADDITION TO A TORNADO THREAT... THIS STORM LIKELY CONTAINS
DAMAGING HAIL TO THE SIZE OF TENNIS BALLS OR LARGER.

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. IF YOU
ARE IN THE PATH OF THIS LARGE AND DESTRUCTIVE TORNADO... TAKE COVER
IMMEDIATELY. A BASEMENT OR STORM SHELTER IS BEST. OTHERWISE...TAKE
COVER IN AN INTERIOR CLOSET OR BATHROOM AWAY FROM OUTSIDE WALLS AND
WINDOWS. COVER YOUR HEAD WITH PILLOWS AND BLANKETS.

LAT...LON 3629 9781 3611 9781 3612 9808 3623 9807
TIME...MOT...LOC 1947Z 255DEG 12KT 3614 9804

$$

24

Pretty obvious that it is on the ground - can't beat a visual!

[RL3AO]

[Bunkertor]

It´s dying

[Brent]

This is fascinating.

[RL3AO]

Two tornadic cells now.