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Flash Flood Threat: Heavy Downpours Incoming Late Sunday
Weekend Weather Alert: Sunshine Saturday, Then Soakers Sunday & Monday!
TL;DR: Enjoy the sun on Saturday! A wet weather system moves in Sunday, bringing heavy rain and a chance of flash flooding (mostly in NY) through Monday. Tuesday looks beautiful again.
Saturday: The "Calm Before the Storm"
Think of Saturday as a free pass. High pressure is in control, giving us a gorgeous start to August.
- Sky: Mostly sunny
- Rain: None expected
- Vibe: Perfect for the beach, a hike, or grilling out.
Sunday: The Rain Arrives (Timing Matters!)
A low-pressure system swings in. It doesn’t hit everyone at once.
Who Gets Wet When?
| Region | Morning | Afternoon & Evening |
|---|---|---|
| New York (esp. St. Lawrence Valley) | Showers arrive | Heavier, steady downpours |
| Vermont & New Hampshire | Mostly dry | Widely scattered showers (hit or miss) |
"Widely scattered" means your town might get a downpour while the town 10 miles away stays totally dry.
IMPORTANT: Flash Flood Risk (Sunday Night)
HEADS UP FOR NEW YORK
The St. Lawrence Valley has a risk for isolated flash flooding Sunday evening into the night.
- What this means: Rain falls so fast the ground can’t soak it up. Roads wash out, streams jump banks fast.
- Action: If you live near streams or low-lying roads in Northern NY, keep an eye on alerts Sunday night. Never drive through flooded roads!
Monday: Round Two (Slow Exit)
The storm system stalls over us. It’s not an all-day downpour, but waves of heavy rain rotate through.
- Timing: Occasional showers & heavy downpours all day
- Exit: Finally pushes out Monday evening.
- Rain Totals: Some spots could see over 2 inches (locally higher).
Monday Flood Risk: "Marginal" for VT & NH
The Weather Prediction Center has issued a Marginal Risk (Level 1 of 4) for excessive rainfall.
- Why not higher? Northern areas are abnormally dry . The ground is thirsty! It will soak up the first inch+ like a sponge, lowering the flood threat.
- Still: Isolated flash flooding is possible where the heaviest bands set up.
Thunderstorms? Yes. Severe? No.
- Severe storms (damaging wind/large hail): NOT expected.
- Embedded thunderstorms: POSSIBLE. These are storms inside the rain bands. They bring torrential downpours, frequent lightning, and maybe small hail.
Tuesday: The Prize at the End!
High pressure builds back in.
- Sky: Mostly sunny
- Temps: Comfortable
- Feeling: Ahhhh.
Your 3-Step "Ready for Rain" Checklist
- Check Gutters & Drains: Clear leaves/debris now so water flows away from your foundation.
- Secure Outdoor Items: Bring in patio cushions, trash cans, and lightweight furniture that could float or blow away.
- Enable Weather Alerts: Make sure Wireless Emergency Alerts (WEA) are ON in your phone settings (usually under Notifications > Emergency Alerts). This is your "tornado/flash flood warning" siren.
Summary: The Big Picture
| Day | Weather | Main Impact | Confidence |
|---|---|---|---|
| Sat | Sunny, Dry | None – Enjoy! | High |
| Sun | Rain arrives PM | Flash Flood Risk (NY Night) | High |
| Mon | Waves of Heavy Rain | Localized Flooding (2"+ rain possible) | Med-High |
| Tue | Sunny, Nice | None – Recovery Day | High |
Bottom Line: This is a beneficial rain for the dry north, but the heavy rates Sunday night/Monday require caution. No First Alert Weather Day yet, but the WCAX First Alert Team is watching it closely.
FAQ: Your Questions Answered
1. "Isolated flash flooding" vs. "Areal flooding" — What’s the difference?
Isolated flash flooding happens fast (minutes/hours) in specific spots (one valley, one road) from extreme rain rates. Areal flooding is widespread, slower rise on main rivers over days. We are watching for the fast, scary, isolated kind Sunday night.
2. Will my baseball game / picnic be ruined Sunday?
Morning? Probably fine. Afternoon/Evening? High risk. Have a backup indoor plan or a popup canopy. Check radar before you head out!
3. What does "Marginal Risk" (Level 1/4) actually mean for me?
It means: "Conditions could support flash flooding in a few spots. It’s not widespread or guaranteed, but don’t ignore it." Think: Stay aware, don’t panic.
4. Why is the flood threat lower in Vermont/NH if rain amounts are the same?
The ground is dry! Dry soil acts like a sponge. Saturated soil (like a wet sponge) cannot hold more water, so it runs off instantly → flooding. Our "thirsty ground" buys us a safety buffer.
5. When will you know exactly where the 2"+ falls?
Nowcasting time. Models show potential. The exact "bullseye" of heaviest rain won’t be clear until we see where the bands set up Sunday morning. Stay tuned to WCAX updates!
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