textproduct: Pendleton

KEY MESSAGES

- Cold morning temperatures continue through early week. *Freeze Warnings Issued*

- Warming trend through the week, mountain showers late in week.

DISCUSSION

Freeze Watches have been upgraded to Freeze Warning pretty much across the board, with some areas having much higher probabilities for sub-freezing temperature by Tuesday Morning (Grande Ronde Valley, Wallowa County, Blue Mt Foothills). The area will undergo clearing as a positively tilted ridge pushes across the PAC NW and Interior NW overnight. Winds throughout the Columbia Basin will be the lightest and that is where concern that probabilities might not be high enough for freezing. Light southerly winds across the central Oregon zones and foothills of the Oregon Blues, and light easterly to southeast winds round out the Tri-Cities and Foothills of the Blues in Washington.

Through midweek, a gradual recovery of temperatures into the 70s for highs and above freezing upper 30s into the 40s for lows will be the trend. Potential for approaching 80 degrees returns per the NBM's MaxT forecasts for the Foothills of the Blue Mts, the John Day Basin and central Oregon by Friday afternoon as breezy winds redevelop late week.

From a clusters perspective the ensemble groups don't seem to have large discrepancies in light precipitation amounts for the the days 7 and 8 period, but more timing whereas all of the clusters offer light (sub one tenth of an inch) of rain across the lower elevations vs in excess of one tenth across some of the the mountain zones Oct 19-22.

AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/

VFR conditions and predominantly light, diurnally driven winds of 10 kts or less are forecast at all sites through the period.

Preliminary Point Temps/PoPs

PDT 29 64 36 69 / 0 0 0 0 ALW 34 65 41 69 / 0 0 0 0 PSC 31 67 36 71 / 0 0 0 0 YKM 34 65 40 71 / 0 0 0 0 HRI 29 66 36 70 / 0 0 0 0 ELN 30 62 35 67 / 0 0 0 0 RDM 22 66 31 70 / 0 0 0 0 LGD 25 64 31 69 / 0 0 0 0 GCD 24 64 33 70 / 0 0 0 0 DLS 37 70 41 74 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES

WA...Freeze Warning from 11 PM this evening to 9 AM PDT Tuesday for WAZ026>029-521. OR...Freeze Warning from 11 PM this evening to 9 AM PDT Tuesday for ORZ044-049-050-507-508-510.