

114 

WWUS20 KWNS 100726

SEL4

SPC WW 100726

LAZ000-MSZ000-CWZ000-101500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 154

NWS STORM PREDICTION CENTER NORMAN OK

225 AM CDT FRI MAY 10 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTH-CENTRAL AND SOUTHEAST LOUISIANA

  SOUTHWEST AND SOUTH-CENTRAL MISSISSIPPI

  COASTAL WATERS



* EFFECTIVE THIS FRIDAY MORNING FROM 225 AM UNTIL 1000 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF MC

COMB MISSISSIPPI TO 35 MILES SOUTHWEST OF HOUMA LOUISIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 153...



DISCUSSION...QLCS ONGOING OVER CNTRL/SWRN LA IS EXPECTED TO CONTINUE

EWD ACROSS THE WATCH AREA EARLY THIS MORNING.  THIS SYSTEM IS BEING

AIDING BY A LOW-AMPLITUDE SHORT-WAVE TROUGH AND ASSOCIATED 50-60 KT

MIDLEVEL JET STREAK WHICH IS ENHANCING FORCING FOR ASCENT AND

VERTICAL SHEAR.  WHEN COUPLED WITH A MOIST AND AT LEAST MARGINALLY

UNSTABLE AIR MASS...THE SETUP WILL REMAIN SUPPORTIVE OF EMBEDDED

LEWP STRUCTURES CAPABLE OF DAMAGING WINDS AND PERHAPS A BRIEF

TORNADO OR TWO.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION

VECTOR 26025.





...MEAD



984 

WWUS20 KWNS 100726 CCA

SEL4

SPC WW 100726 CCA

LAZ000-MSZ000-CWZ000-101500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 154...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

225 AM CDT FRI MAY 10 2013



CORRECTED FOR WATCH PROBABILITIES



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTH-CENTRAL AND SOUTHEAST LOUISIANA

  SOUTHWEST AND SOUTH-CENTRAL MISSISSIPPI

  COASTAL WATERS



* EFFECTIVE THIS FRIDAY MORNING FROM 225 AM UNTIL 1000 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF MC

COMB MISSISSIPPI TO 35 MILES SOUTHWEST OF HOUMA LOUISIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 153...



DISCUSSION...QLCS ONGOING OVER CNTRL/SWRN LA IS EXPECTED TO CONTINUE

EWD ACROSS THE WATCH AREA EARLY THIS MORNING.  THIS SYSTEM IS BEING

AIDING BY A LOW-AMPLITUDE SHORT-WAVE TROUGH AND ASSOCIATED 50-60 KT

MIDLEVEL JET STREAK WHICH IS ENHANCING FORCING FOR ASCENT AND

VERTICAL SHEAR.  WHEN COUPLED WITH A MOIST AND AT LEAST MARGINALLY

UNSTABLE AIR MASS...THE SETUP WILL REMAIN SUPPORTIVE OF EMBEDDED

LEWP STRUCTURES CAPABLE OF DAMAGING WINDS AND PERHAPS A BRIEF

TORNADO OR TWO.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION

VECTOR 26025.





...MEAD

