000 FXUS65 KTWC 252100 AFDTWC Area Forecast Discussion National Weather Service Tucson AZ 200 PM MST Sat May 25 2019 .SYNOPSIS...Another weather system will pass through the region bringing gusty winds and cooler temperatures to start the new week. Thereafter, high pressure will result in a warming trend the rest of the week. Daytime temperatures will climb back into the normal range. && .DISCUSSION...Models showed another system approaching the region tomorrow and tracking through the area Sunday night into Monday. The best chance of precipitation will remain north of the area, so just looking at more wind Sunday afternoon and again Monday. The main concern will be critical fire weather conditions developing tomorrow afternoon and evening. Otherwise, the system will usher in a cooler air mass with high temperature readings remaining below normal. Thereafter, models showed a few more systems brushing the region this week but overall daytime temperatures will warm back to near seasonable readings by the end of the week. && .AVIATION...Valid through 27/00Z. SKC conditions through the forecast period. SWLY SFC wind 12-18 kts this afternoon with gusts of 20-28 kts with the highest winds east and south of KTUS. Winds will diminish to mainly less than 12 kts this evening into early Sunday morning. SWLY SFC winds then increase to 15-25 kts with gusts up to 35 kts after 26/18Z with the highest winds again south and east of KTUS. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Dry conditions will continue through the upcoming week. Elevated winds will continue Sunday as a system passes north of the area with 20-ft south to southwest of 15-30 mph and gusts of 35-40 mph. These wind speeds will combine with relative humidity values of 8 to 15 percent, creating critical fire weather conditions across southern portions of Fire Zone 151 and southern and eastern portions of Fire Zone 152, mainly below 5500 feet. A Red Flag Warning has been issued for these areas Sunday. Wind speeds will decrease slightly on Monday, but will still be breezy to locally windy especially across eastern areas with brief/spotty red flag conditions possible. Typical diurnal wind trends then return on Tuesday through Friday. Below normal temperatures will prevail through the forecast period, although temperatures will be closer to normal late in the week. && .TWC WATCHES/WARNINGS/ADVISORIES... Red Flag Warning Sunday afternoon for AZZ151-152. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
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