SPC Day 2 Fire Weather Outlook

By Newsroom America Feeds at 13 Sep 2017

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0114 AM CDT Wed Sep 13 2017 Valid 141200Z - 151200Z ...Synopsis... Lee surface troughing will occur over the central High Plains, south of a frontal zone extending from the upper Mississippi Valley to the northern Plains. This will be encouraged by mid-level flow attaining more of a zonal component over the central Rockies vicinity. Modest lift well downstream of a mid-level cyclone -- becoming absorbed into a long fetch of southwesterly flow aloft peripheral to an amplifying northwest states trough -- will further enhance the lee surface troughing. These factors will support a relatively enhanced pressure gradient over portions of the central states. ...Portions of KS, the OK Panhandle, northwest OK... The aforementioned pressure gradient is expected to support southerly to south-southwesterly surface winds of 15-22 mph with higher gusts. Despite the southerly flow, moisture return will be very limited on Day-2/Thursday -- owing to the antecedent reinforcement of dry air over the south-central states (south of the remnants of Tropical Cyclone Irma). As temperatures warm into the lower to middle 90s, RH should fall to 19-24 percent (lowest readings in western KS and the adjacent OK Panhandle). Given the drying of fine fuels related to the lack of recent precipitation, elevated fire-weather conditions are anticipated. However, given the lack of an even drier air mass, RH is not expected to become sufficiently low amidst strong winds for Critical designation. ..Cohen.. 09/13/2017 ...Please see www.spc.noaa.gov/fire for graphic product... Read more



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