dimanche 6 avril 2014

Apr 6, 2014 1300 UTC Day 1 Convective Outlook,,,,,,,,,,,,,,,,,,,,,,,http://www.spc.noaa.gov/products/outlook/day1otlk.html

SPC AC 061230
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0730 AM CDT SUN APR 06 2014

   VALID 061300Z - 071200Z

   ...THERE IS A SLGT RISK OF SVR TSTMS FROM CNTRL AND E TX INTO THE
   LWR MS VLY/CNTRL GULF CST REGION...

   ...SYNOPSIS...
   PROGRESSIVE SPLIT FLOW WILL CONTINUE THIS PERIOD...DOWNSTREAM FROM
   AMPLIFYING E PACIFIC RIDGE. THE RIDGE SHOULD ADVANCE EWD TO THE W
   CST BY 12Z MON AS DOWNSTREAM TROUGH NOW OVER NM AND NRN
   SONORA/CHIHUAHUA ARCS ENE INTO ERN AR AND THE ARKLATEX. 

   AT THE SFC...WEAK LOW NOW FORMING ALONG STALLED FRONT OVER THE S TX
   GULF CST SHOULD TRACK NE ALONG THE TX GULF CSTL PLN TODAY...AND INTO
   SW LA THIS EVE. APPROACH OF NM UPR TROUGH SHOULD ALLOW THE LOW TO
   DEEPEN AND ACCELERATE NNEWD TNGT/EARLY MON...WITH THE LOW REACHING
   WRN TN BY THE END OF THE PERIOD. PERSISTENT S TO SWLY LWR
   TROPOSPHERIC FLOW E OF THE LOW SHOULD PROMOTE NWD ADVANCE OF
   ASSOCIATED WARM FRONT NOW OVER THE NWRN GULF CSTL WATERS INTO
   SRN/ERN LA...CNTRL MS...AND WRN/SRN AL LATER TODAY THROUGH TNGT. 

   STRENGTHENING WAA/MOISTURE TRANSPORT AHEAD OF APPROACHING UPR TROUGH
   IS LIKELY TO FOSTER WIDESPREAD COVERAGE OF ELEVATED TSTMS N OF WARM
   FRONT FROM CNTRL AND E TX EWD INTO THE LWR MS VLY. SOME OF THE
   STORMS COULD YIELD LARGE HAIL. LATER TODAY THROUGH EARLY MON...THIS
   ELEVATED ACTIVITY WILL BE ACCOMPANIED BY INCREASING COVERAGE OF
   SFC-BASED STORMS ALONG AND E OF SFC LOW TRACK FROM SE TX INTO
   LA...MS....AND AL. GIVEN STRENGTH OF SHEAR AND AVAILABILITY OF RICH
   MOISTURE..SOME OF THE STORMS WILL BE CAPABLE OF TORNADOES...A FEW OF
   WHICH COULD BE STRONG. 

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