Radioactive Rain Storms & Radcon 4's Radiation Weather Alerts Down Wind Report 7-1-16 HD

An Enhanced Risk of Severe Thunderstorms is Forecast Today and/or Tonight. Severe thunderstorms are expected this afternoon and evening over parts of the Northeast and Mid-Atlantic. A few strong to locally severe storms also may develop over the Carolinas. Farther west, some severe storms are possible mainly from eastern Colorado into central Kansas late this afternoon and tonight. SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING OVER PARTS OF THE NORTHEAST AND MID-ATLANTIC. A FEW STRONG TO LOCALLY SEVERE STORMS ALSO MAY DEVELOP OVER THE CAROLINAS. FARTHER WEST...SOME SEVERE STORMS ARE POSSIBLE MAINLY FROM EASTERN COLORADO INTO CENTRAL KANSAS LATE THIS AFTERNOON AND TONIGHT. ...SYNOPSIS... PROGRESSIVE PATTERN WILL PERSIST ACROSS THE LWR 48...WITH THE MAIN BELT OF THE WLYS CONTINUING OVER THE NRN TIER OF STATES. FAIRLY POTENT SHORTWAVE TROUGH NOW APPROACHING THE LWR GRT LKS WILL PIVOT E/SE INTO WRN QUE/NRN NY THIS EVE...AND CROSS THE LWR ST LAWRENCE VLY EARLY SAT...WHILE ASSUMING A NEGATIVE TILT. ATTENDANT SFC LOW WILL DEEPEN OVER SRN QUE TODAY/TNGT AS TRAILING COLD FRONT ACCELERATE ESE WD...REACHING AN ERN NY/CNTRL MD AXIS BY EARLY EVE. AT THE SAME TIME...LINGERING FRONT OVER THE LWR CHAPEAKE BAY REGION SHOULD FURTHER WEAKEN...ALLOWING RICHER LOW-LVL MOISTURE TO SPREAD NE INTO SERN NY AND SRN/WRN NEW ENGLAND. FARTHER W...MODEST MID-LVL WLY FLOW WILL CONTINUE FROM THE FOUR CORNERS REGION INTO THE CNTRL PLNS BENEATH SRN STREAM JET. UPSLOPE FLOW WILL PERSIST N OF DIFFUSE W-E FRONT NOW STALLING OVER OK/NW TX...AND N OF LEE LOW EXPECTED TO EVOLVE LATER TODAY OVER NE NM AND THE NWRN TX PANHANDLE. ...NORTHEAST/MID-ATLANTIC TODAY INTO TNGT... SEASONABLY STRONG 700-500 MB FLOW ALREADY PRESENT OVER PARTS OF THE NERN U.S. WILL FURTHER STRENGTHEN AND SPREAD E/NE INTO NEW ENGLANDmLATER TODAY/TNGT AS GRT LKS TROUGH CONTINUES GENERALLY EWD. SFC/STREAMLINE ANALYSES SUGGEST THAT A CONFLUENCE AXIS IS BEGINNING TO EVOLVE THIS MORNING FROM ERN WV NWD INTO CNTRL NY...WELL E OF BOTH THE OHIO COLD FRONT AND WRN PA/NY CONVECTIVE BAND. AT THE SAME TIME...SFC AND SATELLITE PW DATA SHOW APPRECIABLE MOISTURE /DEWPOINTS IN THE UPR 60S F AND PW AROUND 1.5 INCHES/ SPREADING NW FROM THE DELMARVA REGION ACROSS ERN PA AND NJ. CONTINUED SFC HEATING AND MOISTENING ALONG WITH MODERATE FORCING FOR ASCENT WITH UPR TROUGH SHOULD RESULT IN FAIRLY WIDESPREAD AFTN STORM DEVELOPMENT IN WEAKLY-CAPPED ENVIRONMENT FROM CNTRL/ERN NY SWD INTO MD-VA. DEVELOPMENT MAY BE MOST CONCENTRATED ALONG THE CONFLUENCE AXIS AND...POSSIBLY...ON ERN EDGE OF WRN PA/NY CONVECTIVE BAND. AMPLE /40+ KT/ WSWLY DEEP SHEAR WILL BE PRESENT FOR SUSTAINED STORMS/SUPERCELLS...BUT STORM MODE WILL BE COMPLEX GIVEN MULTIPLE SOURCES OF LOW-LVL UPLIFT AND WEAK CINH. WITH TIME...OVERALL SET-UP SUGGESTS LIKELY EVOLUTION INTO A FAIRLY EXTENSIVE NE/SW SQLN...WITH THE MOST PROGRESSIVE/LONG-LIVED PART CONTINUING EWD INTO WRN/CNTRL CAPABLE OF SVR HAIL /ESPECIALLY THIS AFTN/...WITH INCREASING