Applicator Weather Brief

Bottom line

• Mild and dry near 61°F, but SW winds of 21–26 mph may gust 33–37 mph before easing.
• No preferred Sunday application window. A conditional 3–5 PM window is possible only if field readings meet the label and site rules.
• Tuesday is the best tentative work day; Wednesday is the backup.
• Monday afternoon-evening brings the next rain chance, probably only trace–0.08 inch.

Today by time block

• 5–8 AM: 51–56°F; SW 20–26 mph, gusting 33–37; dry.
• 8 AM–noon: 55–60°F; SW 18–24 mph, gusting 28–33; dry.
• Noon–4 PM: 58–61°F; SW 10–18 mph, gusting 20–28 and decreasing.
• 4–8 PM: 50–57°F; SW 8–12 mph becoming variable 3–6; inversion/dead-calm risk increases after sunset.

The Hanford public page still displayed an October 19 update without usable current station rows. Off-site KPSC reported 54°F, a 43°F dew point, SSW wind at 16 mph, and overcast skies at 4:20 AM. Field measurements remain controlling. Hanford HMS, NWS point forecast.

Application-window notes

Sunday’s least-unfavorable period is approximately 3–5 PM, with about 20–22 forecast rain-free hours before Monday’s earliest shower chance. Rapid evening wind reduction may create inversion or dead-calm drift conditions. Always compare with the herbicide label, employer/site rules, and field measurements.

Next 7 days

• Sun: 61/43°F; windy early; dry. Likely unsuitable. High confidence.
• Mon: 56/44°F; light wind; 40% afternoon shower chance, trace–0.08 inch. Medium.
• Tue: 61/44°F; SW 3–5 mph; dry. Best tentative day. High.
• Wed: 60/42°F; light wind; dry. Good backup. Medium.
• Thu: 58/42°F; mainly dry. Recheck the approaching system. Medium.
• Fri: 61/45°F; 30–40% shower chance, trace–0.15 inch. Low.
• Sat: Near 61/44°F; potentially breezy, slight shower chance. Low.

Activation-rain outlook

Natural activation is marginal but improving, with medium-low confidence.

• Seven-day total: 0.02–0.20 inch most likely.
• Days 8–14: roughly 0.10–0.75 inch.
• Within 7 days: measurable 75–90%; ≥0.10 inch 40–60%; ≥0.25 inch 15–30%.
• Within 14 days: measurable over 95%; ≥0.10 inch 80–95%; ≥0.25 inch 55–75%.

The more plausible wetting event is Friday into next weekend, though Hanford’s rain shadow could still produce a trace-only result. WPC precipitation guidance.

Extended outlook

CPC favors above-normal temperatures and precipitation in Washington during days 6–14. Weeks 3–4 also favor warmth and above-average West Coast precipitation, but exact inland amounts remain uncertain. November outlooks are broad tendencies—not day-by-day forecasts or a basis for selecting a specific application date. CPC 6–14 day outlook, CPC weeks 3–4.