webcam da urlo! usa: tornado warning!!

**Ben** · 01/03/2007, 03:11

nuove segnalazioni..

0108
1 S COLONY ANDERSON KS3806 9537 THREE TORNADOS COMBINED INTO ONE. (TOP) 0145
7 SE PARKER LINN KS3826 9490 TREES AND POWER LINES REPORTED DOWN (EAX)

**Ben** · 01/03/2007, 03:18

sempre la stessa supercella: sono ormai 30 minuti che procede con un uncino molto definito.
Davvero molto intensa e pericolosa vista l'orario.
Anche quella a nord sta ormai per mostrare un hook definito.

**Ben** · 01/03/2007, 03:23

MESOSCALE DISCUSSION 0221
NWS STORM PREDICTION CENTER NORMAN OK
0746 PM CST WED FEB 28 2007

AREAS AFFECTED...S-CNTRL KS INTO N-CNTRL OK

CONCERNING...TORNADO WATCH 36...

VALID 010146Z - 010315Z

ADDITIONAL STORM DEVELOPMENT IS EXPECTED TO BECOME INCREASINGLY
LIKELY BETWEEN 02-03Z ALONG COLD FRONT/DRYLINE OCCLUSION OVER
S-CNTRL KS INTO N-CNTRL OK. CONTINUE TORNADO WATCH 36.

01Z SURFACE ANALYSIS INDICATED THAT LOW PRESSURE CENTER HAD PASSED
ICT WITH TRAILING COLD FRONT EXTENDING SWWD TO S OF AVK. MOSAIC
RADAR IMAGERY SHOWS DRYLINE RETREATING NWWD...STRETCHING FROM W OF
PNC TO 30 SSE OF END TO 10 W CHK AS OF 0026Z. OCCLUSION OF THESE
TWO BOUNDARIES WILL LIKELY OCCUR FROM SUMNER/COWLEY COUNTIES IN
S-CNTRL KS SWD INTO GRANT/GARFIELD/KAY/NOBLE COUNTIES IN N-CNTRL OK
BETWEEN 02-03Z. 00Z OUN SOUNDING INDICATED THE PRESENCE OF STEEP
LOW TO MID LEVEL LAPSE RATES AND MODEST BOUNDARY LAYER MOISTURE
/LOWEST MEAN MIXING RATIO OF AROUND 9 G PER KG/ WHICH WERE
CONTRIBUTING TO MLCAPES OF 500 J/KG AND A WEAK CAP AROUND 650 MB.

EVENING WATER VAPOR IMAGERY...AND TO SOME DEGREE IR
CHANNEL...INDICATE CONSIDERABLE MOISTENING/COOLING SPREADING NEWD
THROUGH WRN KS...THE OK PNHDL AND THE NRN TX PNHDL...INDICATIVE OF A
MID-LEVEL SPEED MAXIMA/VORTICITY CENTER. FORCING FOR ASCENT
ASSOCIATED WITH THIS FEATURE COUPLED WITH INCREASED LOW-LEVEL
CONVERGENCE ALONG OCCLUDING BOUNDARIES SUGGEST THAT THE INITIATION
OF DEEP...MOIST CONVECTION WILL BECOME INCREASINGLY LIKELY WITHIN
THE NEXT COUPLE OF HOURS.

PREFERRED MODE OF CONVECTION MAY TEND TOWARD MORE LINEAR ALONG
FRONTAL ZONE...HOWEVER PRESENCE OF STRONG AMBIENT SHEAR WILL STILL
SUPPORT EMBEDDED SUPERCELLS CAPABLE OF TORNADOES...DAMAGING WINDS
AND LARGE HAIL.

..MEAD.. 03/01/2007