Weather Summary and Forecast
Significant Heavy Rain and Flash Flooding in Southern Texas
- Potential Tropical Cyclone One: Expected to impact southern Texas on Wednesday.
- Heavy Rain and Flash Flooding: Significant heavy rain with gusty winds ahead of the system. Localized rainfall may exceed 10 inches, especially near or just inland of the lower to middle Texas coast, leading to significant flash flooding.
- Coastal Impact: Some coastal flooding and tropical-storm-force winds are expected along the Texas coast.
Severe Thunderstorms and Heavy Rain
- Northern Plains and Upper Midwest: Today, these areas will experience another round of heavy rain and severe thunderstorms due to a low-pressure system along a frontal boundary.
- Central Plains: By Wednesday, severe weather will shift south into the central Plains, with heavy rain and thunderstorms expected to persist through Thursday morning.
- Transition: Weather will gradually become more scattered across the central Plains, moving towards the lower Great Lakes and interior New England by Thursday morning.
Heat Wave in the Great Lakes, Ohio Valley, and Northeast
- Duration: The heat wave will persist through midweek.
- Temperatures: Highs will reach mid to upper 90s, with some areas hitting the century mark. Morning lows will remain in the mid-70s.
- Records: Numerous record-tying/breaking temperatures are possible.
- Health Risks: Increased danger due to early arrival, duration, and lack of overnight relief, particularly affecting those without adequate air conditioning.
Late-Season Snow in the Northern Rockies
- Snow and Wind: Wet snow continues in high elevations, tapering off early Wednesday.
- System Movement: The potent upper trough will move into southern Canada by this evening, ending inclement weather in the northern Plains by Wednesday morning.
Gulf of Mexico and PTC One
- Tropical Moisture: The elongated upper trough will draw tropical moisture into the central Gulf Coast region.
- Heavy Rain in Texas: On Wednesday, very heavy rain may develop inland of the Texas coastline, potentially leading to significant flash flooding.
- Inland Progression: Heavy rain expected to push further inland across the Rio Grande Valley early Thursday.
- Fire Danger: The fire danger across the Four Corners region should ease with the arrival of cooler air and moisture from PTC One.
Key Points to Monitor:
- Flood Advisories: Keep an eye on local advisories for potential flooding, especially in Texas.
- Severe Thunderstorm Warnings: Pay attention to warnings in the northern and central Plains.
- Heat Wave Alerts: Follow guidance to mitigate health risks from the heat wave.
- Snow Conditions: Be prepared for travel disruptions in high elevations of the northern Rockies.
- Tropical Cyclone Updates: Check the National Hurricane Center for the latest updates on PTC One.
This active weather pattern requires vigilance and preparedness for a range of conditions across different regions.