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NHC has upped the odds of 96L developing to 80% as of the 8 PM EDT update. TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 800 PM EDT WED JUL 7 2010 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... A LARGE LOW PRESSURE SYSTEM LOCATED ABOUT 290 MILES SOUTHEAST OF THE TEXAS/MEXICO BORDER IS MOVING WEST-NORTHWESTWARD AT 10 TO 15 MPH. THIS SYSTEM HAS BECOME MUCH BETTER ORGANIZED THIS AFTERNOON AND EVENING...AND THUNDERSTORM ACTIVITY HAS BECOME MORE CONCENTRATED NEAR THE CENTER. TWO NOAA RECONNAISSANCE AIRCRAFT ARE CURRENTLY CONDUCTING A RESEARCH MISSION IN AND AROUND THE DISTURBANCE...AND INFORMATION RECEIVED SO FAR SUGGESTS THAT A TROPICAL DEPRESSION MAY BE FORMING. ENVIRONMENTAL CONDITIONS ARE CONDUCIVE FOR FURTHER DEVELOPMENT AND IF ADDITIONAL ORGANIZATION CONTINUES...THEN FORECAST ADVISORIES WILL BE INITIATED LATER TONIGHT OR THURSDAY MORNING...WHICH WOULD REQUIRE THAT TROPICAL STORM WATCHES OR WARNINGS BE ISSUED FOR PORTIONS OF THE COASTAL REGIONS OF CENTRAL AND LOWER TEXAS AND NORTHEASTERN MEXICO. THERE IS A HIGH CHANCE...80 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE. THIS DISTURBANCE IS FORECAST TO BRING LOCALLY HEAVY RAINS AND GUSTY WINDS TO PORTIONS OF EASTERN AND SOUTHERN TEXAS AND NORTHEASTERN MEXICO OVER THE NEXT FEW DAYS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER STEWART/CANGIALOSI From the Tropical Weather Discussion... ...SPECIAL FEATURES... A 1007 MB LOW IS CENTERED IN THE WESTERN GULF OF MEXICO NEAR 24N94W AND EXTENDS A SURFACE TROUGH FROM THE LOW TO THE TEXAS COAST NEAR FREEPORT...OR 29N95W. THIS EVENING THE SYSTEM CONTINUES TO ORGANIZE WITH SCATTERED MODERATE AND ISOLATED STRONG CONVECTION LOCATED FROM 20N-27N BETWEEN 91W-97W. MAXIMUM DAYTIME HEATING AND INSTABILITY HAVE ALSO GENERATED SCATTERED STRONG CONVECTION FARTHER SE AWAY FROM THE LOW-LEVEL CIRCULATION CENTER OVER THE WESTERN YUCATAN PENINSULA FROM 17N-22N BETWEEN 88W-92W. SCATTERED SHOWERS AND ISOLATED TSTMS ARE ELSEWHERE OVER THE WESTERN GULF W OF 88W AND STRETCH INLAND OVER LOUISIANA AND EASTERN TEXAS. WITH THE LOW FORECAST TO TRACK NW OVER THE NEXT 24-36 HOURS...UPPER LEVEL WIND SHEAR VALUES REMAIN LOW AND UPPER LEVEL DIVERGENCE REMAINS HIGH OVER MUCH OF THE WESTERN GULF... PROVIDING THE SYSTEM WITH A FAVORABLE ENVIRONMENT FOR DEVELOPMENT. NOAA Recon plane is currently flying a research mission in the area. Appear to have a broad circulation possibly centered near 23.5N/ 93.5W. Based on data from NOAA aircraft. |