WATCH POSSIBLE….SLIGHT RISK UPGRADE for Central AL
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A weather watch is now looking possible for portions of Central Alabama this afternoon as the environment is becoming very unstable with afternoon heating and sunshine. The SPC will upgrade portions of the area to a convective slight risk on the 1630z update….or around 11:30am. We will monitor the situation and keep you updated on the sitaution….the SPC text and statement of the MCD follows…
AREAS AFFECTED...NRN MS...NRN AL...NWRN GA...ERN TN AND WRN NC CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 191530Z - 191630Z THREAT FOR MAINLY ISOLATED DAMAGING WIND WILL EXIST THIS AFTERNOON WITH STORMS DEVELOPING FROM NRN MS THROUGH NRN AND CNTRL AL...NWRN GA...ERN TN AND WRN NC. THIS AREA IS BEING UPGRADED TO A SLIGHT RISK...AND A WW IS POSSIBLE DEPENDING ON CONVECTIVE TRENDS. AT MID-DAY AN EXPANSIVE OUTFLOW BOUNDARY IS MOVING SOUTHEASTWARD THROUGH ERN KY AND ERN TN THEN WWD INTO NRN AL AND NRN MS. THE ATMOSPHERE SOUTH OF THIS FEATURE IS ALREADY MODERATELY UNSTABLE WITH 2000-2500 J/KG MLCAPE. STRONG DIABATIC HEATING OF THE BOUNDARY LAYER WILL RESULT IN FURTHER DESTABILIZATION THIS AFTERNOON. FLOW ALOFT IS WEAK WNWLY ALONG NRN PERIPHERY OF UPPER RIDGE. HOWEVER...GIVEN THE PROPENSITY FOR STORMS TO ORGANIZE INTO MULTICELL LINES ALONG THE OUTFLOW BOUNDARY...A SLIGHTLY GREATER CONCENTRATION OF STRONG TO DAMAGING WIND GUSTS WILL BE POSSIBLE THAN IS USUALLY EXPECTED IN A PULSE STORM ENVIRONMENT.
