Weather Forecast Highlights
Heat Wave
- Focus: Southeast, Mid-South, central/southern Plains.
- Temperatures: Highs in the upper 90s, low 100s in central Plains.
- Heat Index: Up to 110 due to humidity.
- Advisories: Widespread Heat Advisories.
- Nighttime Lows: Mid- to upper 70s, minimal overnight relief.
- Impact: Higher heat-related stress, especially outdoors or without air conditioning.
Severe Storms and Flash Flooding
- Upper Midwest (Monday):
- System: Upper-level shortwave and surface frontal system.
- Conditions: High moisture, strong to extreme instability.
- Risks: Very large hail, significant damaging winds, possible tornadoes.
- Flooding: Heavy downpours, isolated flash flooding risk.
- Midwest/Great Lakes (Tuesday):
- System: Cold front moving southeast.
- Storms: Repeating storms over same areas.
- Risks: Greater flash flooding risk, large hail, damaging winds.
- Outlook: Slight Risk of Excessive Rainfall (level 2/4).
Monsoon-like Conditions in Southwest/Four Corners Region
- Conditions: Daily showers and thunderstorms.
- Risks: Locally intense downpours, isolated flash flooding.
- High Risk Areas: Southeast Arizona, especially urban areas around Tucson.
- Temperatures:
- Four Corners: 80s and 90s.
- Southwest: 100s to 110, heat-related advisories and warnings.
- Elsewhere in West:
- Pacific Coast: 60s and 70s.
- Pacific Northwest: 70s and 80s.
- Great Basin: Low to mid-90s.
- Interior Central California: Low to mid-100s.
- Western Mojave/Sonoran Deserts: 110s.
Northeast U.S.
- Conditions: Showers and storms with a surface low and cold front.
- Impact: Storms tapering off by Monday evening.
- Temperatures:
- Mid-Atlantic: 70s and 80s, relief from heat.
- Return to Average: Tuesday highs in the upper 80s to low 90s.
Southeast U.S.
- Storms: Possible ahead of a cold front.
- Florida: Diurnal sea breeze-related storms Monday and Tuesday.