Area Forecast Discussion
Issued by NWS Pueblo, CO
Issued by NWS Pueblo, CO
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914 FXUS65 KPUB 222103 AFDPUB Area Forecast Discussion National Weather Service Pueblo CO 303 PM MDT Wed May 22 2024 .KEY MESSAGES... - Breezy/windy and warmer Thursday with critical fire weather conditions over the Sangres/Wets. - Isolated afternoon and early evening thunderstorms possible over the higher terrain for Friday. - Scattered showers and thunderstorms will return on Saturday with chances decreasing into Sunday. && .SHORT TERM /THROUGH THURSDAY/... Issued at 258 PM MDT Wed May 22 2024 Breezy and cool across srn Colorado this afternoon, as sly flow has increased on the plains behind departing bubble of surface high pressure in KS. Have seen some very modest cumulus build-up over the mountains at mid-afternoon as lapse rates remain rather steep, though with very dry low levels, deeper convective development has been hard to come by. Still a few CAMS suggesting some brief/weak tsra over the sern plains this evening, so will keep current low pops in place, though gusty winds/sprinkles and 1-2 lightning strikes will be all that we can manage from any storms. Overnight, flat wly low will turn gradually swly and increase into Thu, as next upper wave moves quickly through the central Rockies. Pattern will keep breezes going through most of the night, and min temps all areas will be several degf warmer than this mornings chilly numbers. On Thu, strengthening swly flow aloft and deepening lee surface trough will lead to breezy/windy conditions most areas by afternoon, with gusts of 30-40 mph common. Will upgrade Sangres/Wets Fire Weather Watch to a Red Flag Warning for Thu afternoon/evening as fuels remain critical below 7500 feet there, but no highlights elsewhere, as fuels have greened up and are non-critical. Air mass remains very dry, and will keep pops out of all forecasts, though a few showers could at least get close to the central mountains toward 00z. Max temps will soar with deep mixing, and expect widespread 70s/80s (near 90f lower Arkansas Valley) at lower elevations, while mountains get into the 60s/70s. && .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... Issued at 258 PM MDT Wed May 22 2024 There is GFS/ECMWF/Canadian agreement that a closed upper level low will move from northeast Wyoming into North Dakota on Thursday night and into south-central Canada by Friday night. The best moisture and lift with this system is anticipated to be north of the area by this period, and thus the forecast is mostly dry in a mid-level zonal flow through Friday night. The forecast is mostly dry and not completely dry as an isolated afternoon showers or thunderstorms cannot be ruled out over higher terrain on Friday afternoon. While marginal fire weather criteria for wind and min RH is expected on Friday, green-up has occurred across all of the zones except the southern Sangre de Cristos and Wet Mountains (Zone 125). Thus, a Fire Weather Watch was issued for this area for Friday afternoon. Saturday into Sunday, a broad mid-level trough will approach from the west on Saturday. The trough axis will cross the area Saturday night and shift east of the area on Sunday, putting the area in a northwesterly flow Sunday into Sunday evening. As synoptic scale forcing moves into the area with this feature, the chance for showers and thunderstorms will increase on Saturday into Saturday night. By Sunday, high pressure will begin to build in from the west and mostly dry the area out. Monday into Tuesday, a mid-level ridge will build into the area from the Desert Southwest. With a surface high moving across the area, this will limit showers and thunderstorms to mostly the higher terrain on Monday with moisture on the increase and increasing the chance of showers and thunderstorms across the area on Tuesday. For temperatures, the forecast aligns with the National Blend of Models through the long term period. Highs on Friday will be around 5 degrees below normal, warming to around 5 degrees above normal this weekend and continuing into early next week. /04-Woodrum/ && .AVIATION /00Z TAFS THROUGH 00Z THURSDAY/... Issued at 1117 AM MDT Wed May 22 2024 VFR at all taf sites the next 24 hrs. Breezy sw winds gusting to 25 kts this afternoon/early evening at KALS, then diminishing this evening. At KCOS and KPUB, s-se winds will gust 20-25 kts this afternoon/early evening before diminishing. Gusty (25-30 kts) w-sw winds all areas Thu afternoon. && .PUB WATCHES/WARNINGS/ADVISORIES... Red Flag Warning from 10 AM to 9 PM MDT Thursday for COZ225. Fire Weather Watch from Friday afternoon through Friday evening for COZ225. && $$ UPDATE... SHORT TERM...PETERSEN LONG TERM...WOODRUM AVIATION...PETERSEN