webcam da urlo! usa: tornado warning!!

**Ben** · 01/03/2007, 01:33

Moderate risk per alcuni stati centrali delgl'usa.
Attualmente i primi tornado warning con Kansas in prima fila.
Splendide immagini sono arrivate dalla web cam di Kansas City che posto a seguire.
guardate ragazzi!!

http://www.123cam.com/travel.php?var...ury/index.html

**Ben** · 01/03/2007, 01:43

peccato che l'oscurità e il costante aggiornamento abbia tolto luce e scenografia. Ho comunque salvato un'immagine (l'ultima con luce suff.) ,
siamo a Kansas City ed un ts coi fiocchi in arrivo.
La foto ha parecchio rumore perché ho dovuto ridurla col gif, ma ammirate la struttura per quel che si può vedere.

**Ben** · 01/03/2007, 02:01

ecco un paio di frame radar a riguardo:

il terzo mostra l'intensità e la vicinanza della cella a Kansas City (l'immagine sopra)

il primo mostra un quadro generale sulle celle attive sul Kansas (sono in atto tornado warning sulla cella a sud di Ottawa)

il secondo mostra il gran mesociclone che si é veneto a creare nella cella con tornado warning (notare i colori contrapposti, molto vivi, del doppler)

**Ben** · 01/03/2007, 02:11

continuando ad osservare la supercella sotto Ottawa, il radar mostra picchi di rifrazione davvero molto alti: siamo quasi a fondoscala (70dBz)

SEL6

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 36
NWS STORM PREDICTION CENTER NORMAN OK
510 PM CST WED FEB 28 2007

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

SOUTHEAST AND EAST CENTRAL KANSAS
NORTHEAST OKLAHOMA

EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 510
PM UNTIL 200 AM CST.

TORNADOES...HAIL TO 2 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 50 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
EMPORIA KANSAS TO 20 MILES SOUTH OF TULSA OKLAHOMA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

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.

DISCUSSION...DEEPENING CUMULUS ALONG RETREATING MOISTURE BOUNDARY IN
SE KS SUGGESTS THAT CONVECTIVE INITIATION IS LIKELY IN THE NEXT 1-2
HOURS...WITH MORE ISOLATED STORM DEVELOPMENT ALSO POSSIBLE SWD ALONG
THE DRYLINE INTO NE OK. THE ENVIRONMENT INITIALLY WILL SUPPORT A
THREAT FOR LARGE HAIL AND ISOLATED DAMAGING WINDS WITH SUPERCELLS.
BY LATE EVENING AND OVERNIGHT...THE THREAT FOR TORNADOES WILL
INCREASE IN CONJUNCTION WITH ADDITIONAL LOW-LEVEL MOISTENING AND
STRENGTHENING VERTICAL SHEAR IN ADVANCE OF A DEEPENING SURFACE LOW
AND STRONG MID-UPPER JET STREAK.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24035.

...THOMPSON

**Ben** · 01/03/2007, 02:14

meso ancora abbastanza intenso..

SEL8

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 38
NWS STORM PREDICTION CENTER NORMAN OK
710 PM CST WED FEB 28 2007

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

EXTREME EAST CENTRAL KANSAS
WEST CENTRAL MISSOURI

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 710 PM
UNTIL 300 AM CST.

TORNADOES...HAIL TO 2 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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF
KNOB NOSTER MISSOURI TO 80 MILES SOUTH SOUTHWEST OF KNOB NOSTER
MISSOURI. 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 36...WW 37...

DISCUSSION...ISOLATED TORNADIC SUPERCELL WILL LIKELY PERSIST FOR
SEVERAL MORE HOURS WHILE MOVING ENEWD INTO W CENTRAL MO ALONG THE
NRN FRINGE OF THE MOIST SECTOR. BOUNDARY LAYER DEWPOINTS SHOULD
CONTINUE TO SLOWLY INCREASE INTO THE MID 50S THIS AREA AS LOW-LEVEL
SHEAR ALSO INTENSIFIES...THUS MAINTAINING A FAVORABLE
SUPERCELL/TORNADO ENVIRONMENT WELL INTO THE OVERNIGHT HOURS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 26035.

...THOMPSON

**Ben** · 01/03/2007, 02:19

arrivano le segnalazioni dai chaser riguardo la supercella in questione:

12 NE YATES CENTER WOODSON KS3800 9559 TWO SMALL ROPES REPORTED ON THE GROUND (ICT) 0048
3 W COLONY ANDERSON KS3807 9542 KAKE TV RELAYED REPORT FROM STORM CHASER OF TORNADO ON THE GROUND WEST OF COLONY. (TOP)

**Ben** · 01/03/2007, 02:26

i tornado watch..

**Ben** · 01/03/2007, 02:35

cella davvero cattiva che per buoni 10 minuti ha toccato il fondoscala e continua a "produrre" tornado warning.
Continua ad essere molto attivo il mesociclone che ruota davvero forte:
increddddibile doppler !! Rifrazione = 75dbz! Mazza che cella!