Racecast Weather - Your Source for Race Weather Information
  • Home
  • Racecasts
  • 2025 Schedule
  • Services
  • Contact
  • Bios
  • Links

Wednesday update for 59th Annual Rose Cup Races

7/10/2019

Comments

 
By: Stephen McCoy
Picture
Conditions remain mostly unchanged for this weekend's Rose Cup Races at Portland International Raceway. The atmospheric set-up remains consistent with the initial forecast for the most part. However, the ECWMF has followed the GFS in showing winds more from the west on Sunday which will bring a slight chance for scattered showers near mid-day to the afternoon as moisture moves into the region from the Pacific; dry air in the mid levels will keep any convective precipitation from occurring. This is primarily due to the latest model output bringing the surface low pressure system mentioned below closer towards the coast which will then have a larger influence on the surface and low level wind direction than the surface high pressure system. Otherwise, conditions remain mostly identical, especially on Friday and Saturday; the atmospheric set-up is unchanged and can be found in the next paragraph, copied over from the initial forecast.

For Friday, a high pressure system at the surface will be located in the eastern Pacific with a surface low pressure system directly to the north, off the coast of Canada. The area of high pressure is expected to have a larger influence on the surface winds in the area, with them coming from the north to northwest through much of the weekend. With the systems extending into the low levels, the area between them will act as a funnel for moisture; the cyclonic motion around the low an the anticyclonic motion around the high will cause low level winds from the west. The moist air will condense as it moves up the mountains to the west of Portland, resulting in mostly cloudy conditions in the low levels during Friday morning; drier air from the northwest will cause some slightly clearer conditions in the afternoon. However, an upper level trough centered over the Pacific will bring moisture to the region from the southwest, resulting in mostly cloudy conditions in the upper levels for the remainder of the day. Conditions on Saturday are expected to be mostly the same, though low level winds are anticipated to continue from the west, causing mostly cloudy to overcast conditions in the low levels throughout the day.
Comments

    Social Feeds


    Instagram


    Authors

    Doug Schneider
    Stephen McCoy

    Harris Cooley 


    Categories

    All
    F1
    IGTC
    IMSA
    Indycar
    Le Mans
    MRTI
    NASA
    Outlooks
    Photos
    PWC
    Racecasts
    SCCA
    SRO
    Trans Am
    TUSC
    Verification
    Weather Education
    WEC


    Archives

    May 2025
    April 2025
    March 2025
    February 2025
    January 2025
    December 2024
    November 2024
    October 2024
    September 2024
    August 2024
    July 2024
    June 2024
    May 2024
    April 2024
    March 2024
    February 2024
    January 2024
    December 2023
    November 2023
    October 2023
    September 2023
    August 2023
    July 2023
    June 2023
    May 2023
    April 2023
    March 2023
    February 2023
    January 2023
    December 2022
    November 2022
    October 2022
    September 2022
    August 2022
    July 2022
    June 2022
    May 2022
    April 2022
    March 2022
    February 2022
    January 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    January 2021
    December 2020
    November 2020
    October 2020
    September 2020
    August 2020
    July 2020
    June 2020
    March 2020
    January 2020
    December 2019
    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    April 2019
    March 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018
    February 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016
    December 2015
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014



Powered by Create your own unique website with customizable templates.