Hermiston, Oregon Weather Conditions

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Current Conditions

  • 71°
  • Mostly Cloudy
  • Wind: SSW 9 mph
  • Humidity: 34%
  • Visibility: 10.0 miles
  • Dew Point: 41°
  • Pressure: 29.94 in. +

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Next 12 Hours

5  am
8  am
11  am
2  pm
5  pm
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
66°
70°
79°
86°
88°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 63 °
  • Chance of T-Storms
  • Wednesday
  • Chance of a Thunderstorm
  • High: 91 °
  • Low: 55 °
  • Chance of T-Storms
  • Thursday
  • Clear
  • High: 79 °
  • Low: 55 °
  • Clear
  • Friday
  • Clear
  • High: 88 °
  • Low: 61 °
  • Clear
  • Saturday
  • Clear
  • High: 91 °
  • Low: 63 °
  • Clear

Forecast for Hermiston, Oregon

Updated: 2:00 AM PDT on July 22, 2014

  • Tuesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the West at 5 to 10 mph shifting to the NNW in the afternoon. Chance of rain 30%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 63F. Winds from the West at 5 to 10 mph shifting to the SSW after midnight. Chance of rain 30%.

  • Wednesday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 91F. Windy. Winds from the WSW at 20 to 25 mph with gusts to 35 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain in the evening, then clear. Low of 55F. Windy. Winds from the WSW at 15 to 25 mph with gusts to 35 mph. Chance of rain 30%.

  • Thursday

    Clear. High of 79F. Breezy. Winds from the WSW at 10 to 20 mph with gusts to 30 mph.

  • Thursday Night

    Clear. Low of 55F. Winds from the WSW at 5 to 15 mph.

  • Friday

    Clear. High of 88F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 61F. Winds less than 5 mph.

  • Saturday

    Clear. High of 91F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 63F. Winds less than 5 mph.

  • Sunday

    Clear. High of 99F. Winds less than 5 mph.

  • Sunday Night

    Clear. Low of 64F. Winds less than 5 mph.

  • Monday

    Clear. High of 95F. Winds less than 5 mph.

  • Monday Night

    Clear. Low of 63F. Winds from the SW at 5 to 10 mph.

  • Tuesday

    Partly cloudy. High of 91F. Winds from the WSW at 5 to 10 mph.

  • Tuesday Night

    Clear with a chance of a thunderstorm. Low of 64F. Winds from the WSW at 5 to 10 mph. Chance of rain 20%.

  • Wednesday

    Clear. High of 93F. Winds from the West at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 64F. Winds from the WSW at 5 to 10 mph.

  • Thursday

    Clear. High of 93F. Winds from the West at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 64F. Winds from the WSW at 5 to 10 mph.

  • Friday

    Partly cloudy. High of 95F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 64F. Winds from the WSW at 5 to 10 mph.

Severe Weather Alert Descriptions

 Fire Weather Warning  Statement as of 2:00 PM PDT on July 21, 2014


... Red flag warning in effect from 11 am Tuesday to 11 PM PDT
Wednesday for thunderstorms producing abundant lightning across
fire weather zones or639... or641... wa639... wa641... wa675 and
wa681...

The National Weather Service in Pendleton has issued a red flag
warning for thunderstorms producing abundant lightning... which is
in effect from 11 am Tuesday to 11 PM PDT Wednesday.

* Affected area... in orz639... fire weather zone 639 east slopes
of the northern Oregon Cascades. In orz641... fire weather zone
641 lower Columbia Basin of Oregon. In waz639... fire weather
zone 639 east slopes of the southern Washington Cascades. In
waz641... fire weather zone 641 lower Columbia Basin of
Washington. In waz675... fire weather zone 675 eastern
Washington southern Columbia Basin. In waz681... fire weather
zone 681 yakama alpine district.

* Timing... storms will develop by early afternoon Tuesday and
occasional scattered thunderstorms will be possible through
Wednesday evening.

* Thunderstorms... some storms may become strong with outflow
winds around 40 mph and small hail.

* Precipitation... there will be a mix of wet and dry storms with
anywhere from a few hundredths of an inch to over one quarter
of an inch of rain possible.

* Lightning activity level... 3.

* Impacts... frequent lightning and critically dry fuels may
result in numerous fire starts.

Precautionary/preparedness actions...

A red flag warning means that critical fire weather conditions
are either occurring now... or will shortly. A combination of
strong winds... low relative humidity... and warm temperatures can
contribute to extreme fire behavior.






Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: West Park Area, JW's Backyard, Hermiston, OR

Updated: 4:20 AM PDT

Temperature: 69.1 °F Dew Point: 41 °F Humidity: 36% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET Hermiston OR US, Hermiston, OR

Updated: 3:31 AM PDT

Temperature: 67 °F Dew Point: 45 °F Humidity: 45% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest HERMISTON R&E OR US AGRIMET, Hermiston, OR

Updated: 3:00 AM PDT

Temperature: 71 °F Dew Point: 41 °F Humidity: 34% Wind: SSW at 3 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: South Hill, Umatilla, OR

Updated: 4:20 AM PDT

Temperature: 68.6 °F Dew Point: 43 °F Humidity: 40% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET Umatilla OR US, Umatilla, OR

Updated: 3:47 AM PDT

Temperature: 67 °F Dew Point: 51 °F Humidity: 57% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest ECHO OR US AGRIMET, Echo, OR

Updated: 3:00 AM PDT

Temperature: 71 °F Dew Point: 42 °F Humidity: 35% Wind: SSW at 7 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: MesoWest ECHO OR US UPR, Echo, OR

Updated: 1:45 AM PDT

Temperature: 73 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: MesoWest HERMISTON OR US AGRIMET, Irrigon, OR

Updated: 3:00 AM PDT

Temperature: 68 °F Dew Point: 40 °F Humidity: 36% Wind: South at 5 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest JUNIPR OR US UPR, Helix, OR

Updated: 2:40 AM PDT

Temperature: 75 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: MesoWest Reese OR US CPCRC, Echo, OR

Updated: 3:00 AM PDT

Temperature: 70 °F Dew Point: 34 °F Humidity: 27% Wind: SSW at 6 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET Pendleton OR US, Helix, OR

Updated: 3:44 AM PDT

Temperature: 65 °F Dew Point: 41 °F Humidity: 42% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest Horse Heaven @ I-82 WA US WA DOT, Kennewick, WA

Updated: 3:15 AM PDT

Temperature: 68 °F Dew Point: 37 °F Humidity: 32% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: RAWS UMATILLA OR US, Irrigon, OR

Updated: 3:29 AM PDT

Temperature: 65 °F Dew Point: 45 °F Humidity: 49% Wind: SSE at 1 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Paterson, Paterson, WA

Updated: 4:10 AM PDT

Temperature: 67.3 °F Dew Point: 51 °F Humidity: 57% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Pendleton-Stage Gulch Road, Pendleton, OR

Updated: 4:09 AM PDT

Temperature: 66.6 °F Dew Point: 43 °F Humidity: 43% Wind: Calm Pressure: 29.05 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET Holdman OR US, Helix, OR

Updated: 3:42 AM PDT

Temperature: 66 °F Dew Point: 39 °F Humidity: 37% Wind: South at 2 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Riverside High School, Boardman, OR

Updated: 4:20 AM PDT

Temperature: 74.4 °F Dew Point: 38 °F Humidity: 27% Wind: SSW at 2.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: MesoWest BARNHT OR US UPR, Pendleton, OR

Updated: 3:20 AM PDT

Temperature: 63 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Willow Run Golf Course, Boardman, OR

Updated: 4:20 AM PDT

Temperature: 67.5 °F Dew Point: 46 °F Humidity: 46% Wind: West at 4.0 mph Pressure: 29.65 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest BOARD OR US UPR, Boardman, OR

Updated: 3:00 AM PDT

Temperature: 66 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET Kennewick WA US, Kennewick, WA

Updated: 3:40 AM PDT

Temperature: 72 °F Dew Point: 42 °F Humidity: 34% Wind: SSW at 5 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: South Kennewick, Kennewick, WA

Updated: 4:20 AM PDT

Temperature: 73.8 °F Dew Point: 42 °F Humidity: 32% Wind: SSW at 1.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Summit View, Summit View Kennewick, WA

Updated: 4:19 AM PDT

Temperature: 74.2 °F Dew Point: 42 °F Humidity: 31% Wind: WSW at 3.4 mph Pressure: 29.34 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: National Weather Service, Pendleton, OR

Updated: 4:20 AM PDT

Temperature: 66.9 °F Dew Point: 45 °F Humidity: 46% Wind: North at 2.3 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: MesoWest Upper Speare OR US CPCRC, Echo, OR

Updated: 3:00 AM PDT

Temperature: 70 °F Dew Point: 36 °F Humidity: 29% Wind: SW at 7 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: APRSWXNET Helix OR US, Helix, OR

Updated: 3:37 AM PDT

Temperature: 65 °F Dew Point: 40 °F Humidity: 40% Wind: Calm Pressure: 29.75 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Middle Cold Springs Creek-Helix 6SW, Pendleton, OR

Updated: 4:20 AM PDT

Temperature: 65.0 °F Dew Point: 39 °F Humidity: 39% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Pendleton or 
155 am PDT Tuesday Jul 22 2014 


Short term...today through Thursday...an upper low pressure system 
continues to drop down from the British Columbia coast causing the flow over the 
Pacific northwest to becoming more southwest. This is resulting in 
moisture and instability being pumped northward into the region. 
Radar is showing isolated to scattered showers over the County Warning Area at this 
time with a few stray lightning strikes over the northeast mountains 
earlier last evening. The atmosphere is stabilizing at this time so 
the amount of lightning is decreasing with mainly just showers 
around. This afternoon the bulk shear...negative lifted indice's and cape 
values all increase for an increasing chance of thunderstorms. The 
ingredients are coming together to provide a favorable environment 
for possible strong to severe storms this afternoon and evening. 
Precipitable water values are also increasing which means 
thunderstorms could have heavy rain with them...though thunderstorms 
are expected to produce abundant lightning this afternoon and 
evening. As such a red flag warning is in effect today beginning at 
11 am for the entire fire weather district. The best chance for 
thunderstorms will be over the Oregon portion of the County Warning Area and fire 
weather district...except it also includes the northwest Blue 
Mountains and foothills in Washington. The atmosphere will remain 
unstable on Wednesday with still a decent amount of cape...negative 
lifted indice's and shear. Thunderstorms are therefore forecast for the entire 
County Warning Area/fire weather district on Wednesday as well. As such the red flag 
warning will continue through Wednesday evening. Due to the cloud 
cover and lower 850 mb temperatures maximum temperatures will be 
relatively cool compared to the last two weeks with highs in the 80s 
lower elevations...with mainly 70s in the mountains. The upper low 
will move out of the area on Thursday with drying and stabilization 
taking place. As a result will see thunderstorm activity rapidly 
decrease late Wednesday night and on Thursday across the County Warning Area. 88 


Long term...Thursday night through Monday night...dry westerly flow 
will shift to the southwest over the weekend as high pressure builds 
over the area. Hot temperatures will return to the area Saturday 
through Monday. There is a little hint of some monsoonal moisture 
moving up through central and northeast Oregon on Monday. 
Temperatures are expected to be in the middle 90s to lower 
100s...except middle 80s to lower 90s mountains Monday. Due to strong 
surfaced based heating and the middle level moisture...have added a 
slight chance of thunderstorms to central and northeast Oregon on 
Monday. Weber 


&& 


Aviation...06z tafs. Although VFR conditions will prevail for the 
next 24 hours...there is a possibility that ceilings and/or visibilities will 
lower to MVFR or less with thunderstorms. Middle and high level clouds 
with varying bases will remain at all taf sites through Tuesday 
evening. The air mass will destabilize over time...and there is a 
chance of thunderstorms. Will introduce thunderstorms in the vicinity at krdm and kbdn after 
18z and at kpdt and kalw after 02z/23rd. Confidence is not high for 
other taf sites to observe thunderstorms so have removed these from 
the forecast. Winds will be less than 10 knots through the 
period...but there is always a potential for gusty and erratic winds 
with nearby thunderstorms. Wister 


&& 


Preliminary point temps/pops... 
PDT 85 62 82 54 / 30 40 40 30 
alw 87 66 86 57 / 30 40 40 30 
psc 87 65 86 57 / 20 30 40 30 
ykm 79 62 79 53 / 20 30 50 30 
hri 87 64 84 55 / 20 30 40 30 
eln 77 58 73 51 / 20 30 50 30 
rdm 80 55 73 43 / 30 40 30 20 
lgd 83 58 81 51 / 40 50 40 30 
gcd 85 59 82 48 / 30 50 30 20 
dls 79 65 75 56 / 20 30 40 30 


&& 


PDT watches/warnings/advisories... 
or...red flag warning from 11 am this morning to 11 PM PDT Wednesday 
orz041-044-049-050-502-503-505>508-510. 


Red flag warning from 11 am this morning to 5 PM PDT Wednesday 
orz509-511. 


Washington...red flag warning from 11 am this morning to 11 PM PDT Wednesday 
waz024-026>030-520-521. 


&& 


For additional weather information, check our web site at... 
www.Weather.Gov/Pendleton 


$$ 


88/89/89 



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