Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0130 AM CST Thu Mar 02 2017 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms may occur along the Pacific Northwest coastal area on Saturday. ...Synopsis... A progressive low-amplitude upper pattern will prevail across the U.S. Saturday. Embedded in this regime, an upper trough will move into the Pacific Northwest, while a southern-stream shortwave trough affects portions of southwest and southern Texas. ...Pacific Northwest... Steep mid-level lapse rates with cold air aloft accompanying the upper trough will contribute to weak instability along the OR and WA coasts. Showers and possibly a few thunderstorms will develop within this regime, becoming more numerous along a cold front that will move onshore during the late afternoon. ...South Central through South Texas... Weakening southern-stream trough will move through northern Mexico and a portion of TX this period. Modified continental-polar air will return through south TX, but weak lapse rates and widespread clouds will result in only very weak instability (MUCAPE at or below 200 J/kg). While rain and numerous showers will likely develop in this regime, current indications are that instability will probably remain too limited for more than 10% coverage of thunderstorms. ..Dial.. 03/02/2017Read more
from SPC Forecast Products http://ift.tt/tmgE4J
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