Marine Weather and Tide Forecast for Kittitas, WA
July 3, 2024 2:21 AM PDT (09:21 UTC) Change Location
 | Sunrise 5:11 AM Sunset 9:02 PM Moonrise 1:38 AM Moonset 6:42 PM |
FXUS66 KPDT 030438 AFDPDT
Area Forecast Discussion National Weather Service Pendleton OR 938 PM PDT Tue Jul 2 2024
SHORT TERM UPDATE
The forecast area is under a dry northwest flow aloft, and breezy to windy conditions remain. A shortwave trough over far NE WA and the ID Panhandle allowed gradients to strengthen and cooler marine air to surge through the Cascade gaps and CR Gorge this evening. Nighttime microphysics of GOES West show stratus clouds banked up along the west slopes of the WA Cascades. However, the stratus is shallow based on the 00Z UIL sounding with a marine depth up to 2800 ft MSL. Forecast was updated to increase winds in some locations as well as extend the breezy winds through 06Z. Due to the shallow marine layer, confidence is high (80%) that winds will decrease after midnight.
AVIATION
06z TAFs...Clear skies will continue through Wednesday evening. WNW winds 10-20kt gusting to 25-30kt this evening will diminish overnight, and winds on Wednesday will be primarily light and terrain driven with the exception of breezy winds at DLS. Wister/85
PREV DISCUSSION
/issued 450 PM PDT Tue Jul 2 2024/
Main changes begin to take place on Thursday as the ridge of high pressure over the eastern Pacific begins pushing into the Pacific Northwest. This will be the beginning of a long hot dry period that will persist into next week. High temperatures will climb into the lower to mid 90s across the lower elevations with pleasant 80s in the mountains. Skies will be generally clear through the day providing easy viewing of evening firework displays. Winds will also be light and generally under 10 mph.
Conditions will be dry with afternoon and evening relative humidities down to 10-20 percent with fine grass fuels being extremely dry.
LONG TERM
Friday through Tuesday
No changes in messaging.
Forecast confidence is high (>90%) that we will see the hottest temperatures of the summer so far as strong, persistent ridging moves over the PacNW during the day Friday and sticks around for the foreseeable future. The only thing ensembles really waver on is the exact positioning of the ridge axis, and the extent to which a shortwave on Friday riding the ridge to our northeast modulates the high pressure position at all. This would only serve to delay the inevitable, however, as guidance exhibits a strong signal on the region being enveloped by high pressure by Saturday at the latest, and likely (70-80%) lasting through most of next week.
We have issued an Excessive Heat Watch for most of our non-mountain zones starting this Friday and lasting through the middle of next week. NBM probabilistic shows high probabilities (generally 60-80%)
in highs eclipsing the century mark starting on Saturday for the majority of our population centers. We'll have to keep an eye on where this ridge of high pressure ultimately centers itself early next week, as the NBM may be a bit gun-shy on temps should the high fall directly overhead as the deterministic GFS and ECMWF currently suggest.
Otherwise, fire weather concerns will be low, as hot temperatures will cause RHs to sink well into the teens, but winds are expected to be weak, outside of the usual cross-Cascade gradient that will only be exacerbated under this heat wave. Still, the forecast looks to be very stagnant: hot, dry, and clear. Stay hydrated! Evans/74
PRELIMINARY POINT TEMPS/POPS
PDT 55 83 55 90 / 0 0 0 0 ALW 57 86 58 93 / 0 0 0 0 PSC 59 89 59 94 / 0 0 0 0 YKM 55 88 56 92 / 0 0 0 0 HRI 58 88 57 95 / 0 0 0 0 ELN 55 83 55 90 / 0 0 0 0 RDM 46 84 49 92 / 0 0 0 0 LGD 50 79 51 87 / 0 0 0 0 GCD 48 83 50 90 / 0 0 0 0 DLS 56 88 59 97 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
OR...Excessive Heat Watch from Friday afternoon through Tuesday evening for ORZ041-044-505-507-508-510-511.
WA...Excessive Heat Watch from Friday afternoon through Tuesday evening for WAZ024-026>029-521.
Area Forecast Discussion National Weather Service Pendleton OR 938 PM PDT Tue Jul 2 2024
SHORT TERM UPDATE
The forecast area is under a dry northwest flow aloft, and breezy to windy conditions remain. A shortwave trough over far NE WA and the ID Panhandle allowed gradients to strengthen and cooler marine air to surge through the Cascade gaps and CR Gorge this evening. Nighttime microphysics of GOES West show stratus clouds banked up along the west slopes of the WA Cascades. However, the stratus is shallow based on the 00Z UIL sounding with a marine depth up to 2800 ft MSL. Forecast was updated to increase winds in some locations as well as extend the breezy winds through 06Z. Due to the shallow marine layer, confidence is high (80%) that winds will decrease after midnight.
AVIATION
06z TAFs...Clear skies will continue through Wednesday evening. WNW winds 10-20kt gusting to 25-30kt this evening will diminish overnight, and winds on Wednesday will be primarily light and terrain driven with the exception of breezy winds at DLS. Wister/85
PREV DISCUSSION
/issued 450 PM PDT Tue Jul 2 2024/
Main changes begin to take place on Thursday as the ridge of high pressure over the eastern Pacific begins pushing into the Pacific Northwest. This will be the beginning of a long hot dry period that will persist into next week. High temperatures will climb into the lower to mid 90s across the lower elevations with pleasant 80s in the mountains. Skies will be generally clear through the day providing easy viewing of evening firework displays. Winds will also be light and generally under 10 mph.
Conditions will be dry with afternoon and evening relative humidities down to 10-20 percent with fine grass fuels being extremely dry.
LONG TERM
Friday through Tuesday
No changes in messaging.
Forecast confidence is high (>90%) that we will see the hottest temperatures of the summer so far as strong, persistent ridging moves over the PacNW during the day Friday and sticks around for the foreseeable future. The only thing ensembles really waver on is the exact positioning of the ridge axis, and the extent to which a shortwave on Friday riding the ridge to our northeast modulates the high pressure position at all. This would only serve to delay the inevitable, however, as guidance exhibits a strong signal on the region being enveloped by high pressure by Saturday at the latest, and likely (70-80%) lasting through most of next week.
We have issued an Excessive Heat Watch for most of our non-mountain zones starting this Friday and lasting through the middle of next week. NBM probabilistic shows high probabilities (generally 60-80%)
in highs eclipsing the century mark starting on Saturday for the majority of our population centers. We'll have to keep an eye on where this ridge of high pressure ultimately centers itself early next week, as the NBM may be a bit gun-shy on temps should the high fall directly overhead as the deterministic GFS and ECMWF currently suggest.
Otherwise, fire weather concerns will be low, as hot temperatures will cause RHs to sink well into the teens, but winds are expected to be weak, outside of the usual cross-Cascade gradient that will only be exacerbated under this heat wave. Still, the forecast looks to be very stagnant: hot, dry, and clear. Stay hydrated! Evans/74
PRELIMINARY POINT TEMPS/POPS
PDT 55 83 55 90 / 0 0 0 0 ALW 57 86 58 93 / 0 0 0 0 PSC 59 89 59 94 / 0 0 0 0 YKM 55 88 56 92 / 0 0 0 0 HRI 58 88 57 95 / 0 0 0 0 ELN 55 83 55 90 / 0 0 0 0 RDM 46 84 49 92 / 0 0 0 0 LGD 50 79 51 87 / 0 0 0 0 GCD 48 83 50 90 / 0 0 0 0 DLS 56 88 59 97 / 0 0 0 0
PDT WATCHES/WARNINGS/ADVISORIES
OR...Excessive Heat Watch from Friday afternoon through Tuesday evening for ORZ041-044-505-507-508-510-511.
WA...Excessive Heat Watch from Friday afternoon through Tuesday evening for WAZ024-026>029-521.
Link to 1 hour of 5 minute data for KELN
Terminal Aerodrome Forecast (TAF) for KELN
toggle option: (graph/table)
Terminal Aerodrome Forecast (TAF) for KELN
Wind History graph: ELN
(wind in knots)
Pendleton, OR,
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