Tampico, Washington Weather Forecast Discussion

996
FXUS66 KPDT 101746
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
1046 AM PDT Wed Sep 10 2025
.UPDATED AVIATION.
.AVIATION...18Z TAFs...Showers and thunderstorms will develop
across the region. Wasn`t too confident on timing and location (if
they will strike the airway), so did not put in a TEMPO or PROB30
for any site. Greatest chances of thunderstorms looks to be
around the BDN/RDM sites (10-20%) over the next 24-hours. Winds
will generally be light and variable for most sites, with the
exception of gusty winds along strong storms.
&&
PREV DISCUSSION... /issued 201 PM PDT Tue Sep 9 2025/
DISCUSSION...Radar shows showers and thunderstorms developing
across the region. Upper low is creating enough instability with
abundant moisture to keep storms pulsing through the rest of the
afternoon. Will see the greatest chance (25-35%) of thunderstorms
near the Bend/Central OR region. Heavy rainfall, cloud-to-ground
lightning, and locally gusty winds from strong storms will be the
primary threat going through today and the next couple of days.
The pattern will continue through Thursday as the low continues
to push through the PacNW. Showers and thunderstorms embedded with
abundant lightning will continue to be the main story as the
weather disturbance progresses and brings cooler temperatures
along the process. High temps will taper down to seasonal normal
to around 5 degrees below normal, with some places in the area
only reaching the high 70s to low 80s for their highs. Training
storms along with slow motion storms across the region will cause
flooding concerns through mid week. Scar burned areas are mostly
of concern, but other areas with steep terrain and general flood
prone areas will need to monitor for potential hazards.
We`ll go through a more transitional weather phase going into the
weekend, as the area will be in-between two weather systems when
the current trough exits the region. Saturday will see us in a
bit of a dry break thanks to the transition with a temporary ridge
like pattern. This will be short lived before the next weather
system enters the area at the beginning of next week when the next
trough quickly makes its way in. Guidance has good confidence
(60-80% chance) that we will re-enter another wet pattern, but
confidence in clusters and NBM falls right after Sunday and how
it wants to handle the strength of the system throughout next
week. Regardless, expect another round of widespread precip
starting the new work week.
&&
.PRELIMINARY POINT TEMPS/POPS...
PDT  81  59  78  56 /  20  60  70  30
ALW  82  63  78  60 /  20  60  70  40
PSC  85  60  83  57 /  20  40  40  10
YKM  86  59  86  56 /  20  10  20  10
HRI  84  61  81  58 /  20  50  60  20
ELN  84  55  83  54 /  20  10  20  10
RDM  73  49  73  44 /  70  60  60  20
LGD  79  53  72  52 /  30  80  80  50
GCD  76  52  70  50 /  60  80  80  40
DLS  83  62  79  59 /  30  30  30  10
&&
.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Flash Flood Watch through Thursday evening for ORZ503-505-506.
Flash Flood Watch through this evening for ORZ509-511.
WA...None.
&&
$$
SHORT TERM...95
LONG TERM....95
AVIATION...95

NWS PDT Office Area Forecast Discussion