Spring in Cheyenne may bring blooming landscapes and warmer breezes, but it’s also prime time for flash flooding. These events are typically driven by powerful thunderstorms from late spring through early fall, not gradual snowmelt. In some cases, sudden wall-to-wall rainfall can wreak havoc in minutes.
Historical Context: Why Cheyenne is Flood-Prone
- August 1, 1985: A catastrophic event where Cheyenne endured up to 8 inches of rain in just 3 hours, setting both 1-hour and 24-hour rainfall records for Wyoming. The resulting hail—some as large as 2 inches in diameter—accumulated in drifts up to 6 feet deep, mirroring a winter scene on the streets.
- Consequences included 12 fatalities, dozens of injuries, and over $65 million in property damage. Flash flooding struck heavily along Dry Creek, Crow Creek, and downtown areas.
- Laramie County floods: In May 1904, Crow Creek unleashed a 500-year flood, sending a 20–25 foot wall of water through parts of Cheyenne.
These historic events underscore how rapidly extreme weather can escalate—from benign skies to raging torrents in minutes.
Why Spring Flooding Still Matters in Cheyenne
- Flash flood peak season in Wyoming runs May through September, with late July and early August especially risky due to monsoon moisture surging north.
- Flash flooding may strike far from where rain fell, so if you’re near steep terrain, narrow channels, or dry washes, even seemingly clear skies overhead don’t guarantee safety.
- Cheyenne faces risk in several urban drain basins—including Crow Creek, Dry Creek, Capitol Basin, Holliday Basin, East Lincolnway Basin, Henderson Basin, and Clear Creek Basin.
Part 1: Fortify Your Home Against Flash Flooding
1. Mapping & Awareness
- View FEMA Flood Insurance Rate Maps (FIRM) and local floodplain maps available through the City of Cheyenne or Laramie County offices.
- Stay informed with the early flood warning system—monitored by USGS and NWS—for key waterways like Dry Creek and Crow Creek.
2. Physical Fortifications
- Elevate landscaping so water flows away from your home, not toward it.
- Repair foundation cracks, and seal basements using waterproof materials.
- Install sump pumps and backflow valves to stop water intrusion and sewer backup.
- Consider flood vents to allow water flow and reduce pressure on walls during deep floods.
3. Home Upgrades That Help
- Raise mechanical systems, like HVAC units—above basement levels or potential flooding range.
- Use water-resistant materials on ground floors (e.g., tile, waterproof drywall).
- Keep important documents and valuables secured in waterproof containers elevated above ground.
Part 2: Quick & Safe Post-Flood Cleanup Formula
If floodwater enters your home, clean quickly to avoid long-term damage:
** DIY Flood Cleanup Solution**
- 1 gallon warm water
- 1 cup household bleach (kills bacteria & mold spores)
- ¼ cup mild dish soap (removes sludge)
Instructions:
- Gear up: gloves, mask, and boots.
- Remove debris and aspirate standing water ASAP.
- Scrub affected areas with the solution.
- Rinse thoroughly with clean water, then dry completely—use fans and dehumidifiers.
Safety Tip: Never mix bleach with ammonia or other cleaners, which can create toxic gases.
Part 3: Smart Home Buying—Avoid Flood Pitfalls
What to Watch for:
- Proximity to FEMA floodplains or low-lying drainage basins.
- History of water-related issues in the neighborhood (ask local inspectors or previous owners).
- Structural attributes indicating flood resilience—or vulnerability.
Make Your Purchase Wisely
Before making a move in Cheyenne real estate, consult ForSaleCheyenne.com. Their expertise can help you:
- Identify properties with favorable elevation and solid drainage.
- Understand current flood risks and mitigation measures in neighborhoods.
- Invest confidently in homes designed to handle Wyoming’s flash-flood prone climate.
Final Thoughts
Flash floods in Cheyenne are unpredictable but preventable threats. With preemptive measures, rapid cleanup protocols, and the right real estate guidance, you can safeguard your home and financial peace of mind. Stay prepared—and choose wisely.
