Wyoming Flood Watch & Storm Threats
A Flood Watch is in effect for portions of central, northwest, and west central Wyoming as increasing moisture and repeated showers and thunderstorms create the potential for excessive rainfall. The National Weather Service in Riverton says the watch begins at 6 PM MDT Friday, August 28, and continues through Sunday morning. (National Weather Service)
At the same time, a Special Weather Statement highlights the potential for strong thunderstorms across portions of southeast Wyoming, including areas around the Laramie Valley, Snowy Range foothills, Carbon County and the Laramie Range.
Flood Watch Covers Mountainous Areas
The Flood Watch includes several areas where steep terrain, narrow valleys and existing waterways can allow heavy rainfall to produce rapid runoff.
Central Wyoming
The Wind River Mountains West is included in the Flood Watch. Heavy showers and thunderstorms over mountainous terrain can send water rapidly into creeks, streams and drainage areas.
Northwest Wyoming
The Flood Watch includes:
- Absaroka Mountains
- Jackson Hole
- Teton and Gros Ventre Mountains
- Yellowstone National Park
Communities and visitors in these areas should remain alert because thunderstorms can produce locally heavy rainfall even when rainfall is not widespread.
West Central Wyoming
The watch also covers:
- Salt River and Wyoming Ranges
- Star Valley
The National Weather Service notes that increased Pacific moisture moving across northwest Wyoming will contribute to an extended chance for showers and thunderstorms through the weekend. Locally heavy rainfall could produce excessive runoff in flood-prone and low-lying locations. (National Weather Service)
Why Heavy Rain Could Become a Flood Problem
Mountainous Wyoming can be particularly vulnerable to rapid runoff. When thunderstorms develop over higher terrain, rainfall can move quickly downhill toward creeks, rivers and low-lying areas.
Additionally, thunderstorms may repeatedly develop over the same general areas. This can cause rainfall totals to increase faster than the ground and drainage systems can absorb the water.
Because of that, a location does not necessarily have to experience severe weather directly overhead to encounter dangerous conditions downstream.
Special Weather Statement for Southeast Wyoming
A separate Special Weather Statement covers portions of southeast Wyoming, including:
- Central Carbon County
- North Snowy Range Foothills
- Laramie Valley
- South Laramie Range
- South Laramie Range Foothills
Recent strong thunderstorms in the region have produced gusty winds and hail, demonstrating the potential for rapidly changing conditions across southeast Wyoming. National Weather Service statements have documented storms capable of producing wind gusts around 50 mph and hail in portions of the Laramie-area region. (National Weather Service)
These areas should continue monitoring radar and updated weather statements as thunderstorms develop.
Flood Safety: What You Should Do
If you are in or traveling through a Flood Watch area, preparation is important before storms arrive.
Never drive through a flooded roadway. Water can hide washed-out pavement, debris and damaged bridges, while even relatively shallow moving water can cause a vehicle to lose traction.
Also:
- Monitor updated forecasts and weather alerts.
- Avoid camping or parking near streams and low-water crossings.
- Move to higher ground if water begins rising.
- Do not attempt to cross a flooded creek or roadway on foot.
- Keep children and pets away from fast-moving water.
- Be especially cautious overnight when flooding can be harder to see.
If a Flash Flood Warning is issued for your location, take immediate action and move to higher ground.
What to Watch Through the Weekend
The combination of increased atmospheric moisture, showers and thunderstorms will keep the flood threat elevated across portions of western and central Wyoming. The greatest concern is locally heavy rainfall and excessive runoff, particularly across mountainous and flood-prone terrain. (Winter Weather Warnings)
Meanwhile, thunderstorms across southeast Wyoming can bring additional hazards such as strong wind gusts and hail.
Weather conditions can change quickly in the mountains, so residents, travelers, campers and outdoor recreationists should check the latest forecast before heading out.
Radar Watch HQ Final Thoughts
The Wyoming Flood Watch is an important reminder that heavy rain does not have to last for hours to create dangerous flooding. Thunderstorms can drop significant rainfall over a small area, while Wyoming’s mountainous terrain can accelerate runoff into lower elevations.
From Jackson Hole and Yellowstone National Park to the Wind River Mountains, Star Valley and the Wyoming Ranges, stay weather-aware through the weekend. If you encounter flooding, turn around and find another route—never risk your life trying to cross moving water.
Radar Watch HQ will continue monitoring the evolving rainfall, thunderstorm and flooding potential across Wyoming. Stay alert, stay informed and stay safe.
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Radar Watch HQ Top 5 Essential Emergency Preparedness Picks
Whether you’re preparing for severe thunderstorms, flash flooding, hurricanes, wildfires, or extended power outages, these five emergency essentials can help keep your household safer when severe weather strikes.
A portable power station provides reliable backup electricity during outages, allowing you to power phones, medical devices, laptops, lights, small appliances, and communication equipment without fuel.
Best for:
- Extended power outages
- Severe thunderstorms
- Hurricanes
- Winter storms
- Wildfires
2. Flood Protection Barriers & Sandless Flood Bags
Flood barriers help divert or absorb water before it enters garages, doorways, and low-lying areas. They deploy quickly and can help reduce property damage during flash flooding.
Best for:
- Flash Flood Warnings
- Heavy rainfall
- River flooding
- Coastal flooding
3. Rechargeable LED Flashlights
Bright, dependable flashlights are essential when the power goes out. Rechargeable or solar-powered models provide long-lasting illumination for navigating safely indoors and outdoors.
Best for:
- Overnight power outages
- Emergency evacuations
- Storm damage inspections
Keep phones, tablets, weather radios, and USB-powered devices charged when the electrical grid is unavailable. A solar power bank offers an additional charging option during prolonged emergencies.
Best for:
- Communication during outages
- Emergency weather alerts
- Travel and evacuation
A NOAA Weather Radio delivers official weather alerts directly from the National Weather Service, even when cellular networks or internet service are unavailable. It remains one of the most dependable ways to receive life-saving warnings.
Best for:
- Tornado warnings
- Severe thunderstorm warnings
- Flash flood warnings
- Hurricane alerts
- Winter storm emergencies
Why Radar Watch HQ Recommends These Essentials
At Radar Watch HQ, preparedness is just as important as staying informed. These five emergency essentials can help you stay connected, protect your property, and safely navigate severe weather events. Having supplies ready before storms arrive allows you to respond quickly when warnings are issued and conditions begin to deteriorate.
