Weather for RVers and travelers Sunday 21 July 2024

Widespread, near record-breaking heat persists across the West for much of this coming week.
Monsoon conditions, including strong thunderstorms, across southern Arizona and the Southern Rockies today.
Numerous showers and thunderstorms from Arizona to Georgia today, then spreading northwards to Pennsylvania on Monday.

From the RV Weather Field Office in State College PA:

These are the most significant weather impacts to RV travel over the next two to three days. I do not list every area of rain, showers, or breezy winds. It would be exhausting (for both of us!).

Weather Impacts Pacific Time Zone:

— Portions of western and north-central WA; much of OR: Red Flag (fire danger) Warnings today. Hot temperatures, very low humidities and unstable conditions may produce extreme fire behavior. I-5, I-84, I-90, US-2, US-12, US-20, US-26, US-95, US-97, US-101, US-395 potentially impacted.

— Much of central and eastern WA and OR; north-central and northeast CA; northern NV; northern ID: A combination of Excessive Heat Warnings and Advisories through Monday. Hottest days Sunday and Monday. Advisories continue through Wednesday in parts of OR and NV. High temperatures 95 – 110 deg F.

— Portions of northern and central CA including the Sacramento and northern San Joaquin Valleys and the greater Bay Area: Heat Advisories Monday through Wednesday. High temperatures 100-110 deg F.

— A portion of interior central CA: Excessive Heat Warning Monday through Wednesday. High temperatures as high as 111 deg F.

— Southern CA foothills and mountains away from the immediate coast: Heat Advisories through Wednesday. High temperatures mid 90’s to 105 deg F.

— Interior southern CA; and southeast CA interior deserts and east of the Sierra Nevada, including the Mojave Desert and Death Valley National Park; southern NV; adjacent northwest AZ: Excessive Heat Warnings today. High temperatures 107 – 118 deg F with temperatures reaching the mid-120’s deg F in Death Valley NP. I-8, I-10, I-15, I-40, US-395, CA-14, CA-58 impacted.

Weather Impacts Mountain Time Zone:

— Northwest MT; northern and central ID: Excessive Heat Warnings and Advisories through Tuesday. High temperatures generally 95-105 deg F.

— Southwest and south-central ID along the I-84 corridor: Excessive Heat Warnings and Advisories through Wednesday. High temperatures 104-108 deg F. I-84, US-26, US-93, US-95 impacted.

— North-central and parts of northwest AZ: Excessive Heat Warnings today. High temperatures 106-116 deg F. I-40, US-93 impacted.

— Much of central and southern AZ: Isolated, marginally severe thunderstorms are possible this afternoon into early evening. Wind and some hail are the primary hazards. I-8, I-10, I-17, I-40, US-60, US-70 potentially impacted.

— South-central CO; Much of southwest, central and eastern NM north of I-10: Flood Watches this afternoon through late tonight. Flash flooding may be caused by an increase in the number and intensity of showers and thunderstorms. Rainfall rates may exceed 2 inches per hour. I-25, I-40, US-24, US-50, US-54, US-60, US-64, US-70, US-84, US-285, US-380 potentially impacted.

— South-central CO; northeast and east-central NM: Isolated, marginally severe thunderstorms are possible this afternoon into early evening. Wind and some hail are the primary hazards. I-25, I-40, US-50, US-64 potentially impacted.

Weather Impacts Central Time Zone:

— Eastern ND; northeast SD; MN; northwest WI: Strong thunderstorms possible Monday evening. I-29, I-35, I-90, I-94 potentially impacted.

— Much of south-central and eastern NE; southeast SD; western IA; southwest MN: Dense Fog Advisories this morning. I-29, I-80, I-90 impacted.

Weather Impacts Eastern Time Zone:

— Central and southern IN; KY; TN; southeast OH; central and southern PA; WV; central and western MD; much of VA; central and western NC: Widely scattered strong, possibly severe thunderstorms possible Monday afternoon and evening. I-24, I-40, I-64, I-65, I-66, I-68, I-69, I-70, I-76, I-77, I-78, I-79, I-80, I-81, I-83, I-85, I-95, I-99, PA Turnpike potentially impacted.

— Southern FL: Heat Advisory today and Sunday. Heat index values may reach 105-110 deg F.