SPC Nov 14, 2017 1730 UTC Day 2 Convective Outlook

By Newsroom America Feeds at 14 Nov 12:09

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1106 AM CST Tue Nov 14 2017 Valid 151200Z - 161200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... No severe storms are expected Wednesday. ...Synopsis... Shortwave trough currently moving through the Pacific Northwest will continue eastward across upper Midwest and upper Great Lakes, while amplifying, on Wednesday. Surface low associated with this shortwave will move eastward across upper MI and into southern Ontario while further occluding and an attendant cold front will move southeastward across the middle MS Valley and northern/western portions of the southern Plains. Showers and isolated elevated thunderstorms are anticipated on Wednesday morning from the Ozark Plateau northeastward through the lower OH river valley as low-level southwesterly flow supports isentropic ascent throughout the frontal zone. Poor lapse rates and resulting limited instability should temper updraft strength, keeping storms sub-severe. Thunderstorm coverage should decrease thereafter as the better forcing for ascent is displaced northward and the southwesterly low-level flow weakens. Farther west, a strong shortwave trough, accompanied by enhanced flow aloft, will pivot around an upper low centered off the British Columbia coast and into the Pacific Northwest. Some isolated thunderstorms are possible along the Pacific Northwest coast within the initial strongly forced frontal band during the morning and then again overnight/early Thursday morning as temperatures aloft cool and moderate forcing for ascent persists. ..Mosier.. 11/14/2017 Read more

http://www.spc.noaa.gov/products/outlook/day2otlk_1730.html

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