Awning Storm Preparation: A Thunderstorm Checklist and Timeline
Quick answer
Retract a fabric awning as soon as a thunderstorm is forecast for the next few hours or thunder is audible, because the gust front often arrives several minutes before the rain with winds far above the 20 to 25 mph limit most retractables are built for. Disconnect motorized awnings if you will be away, take down canopies and side screens, and inspect brackets and arms before the next use.
The safe rule for thunderstorms is simple: retract the awning before the storm arrives, not when it starts to rain. Thunderstorms push a gust front ahead of the rain that can bring sudden winds of 40 mph or more, well beyond the roughly 20 to 25 mph at which most retractable fabric awnings should already be closed. Wind sensors help, but they react after the gust begins and stop working if the power fails. If a storm is forecast while you are out, retract before you leave.
This page is the short-notice playbook for thunderstorms, squall lines and sudden summer storms. For hurricane planning, which involves removing awnings days ahead, see awnings and hurricanes. For the full picture of rain, snow, hail and heat, see awnings in bad weather.
How thunderstorms damage awnings
Most thunderstorm awning damage happens in the first few minutes, and much of it before a drop of rain falls.
- Gust front and outflow winds. Cold air rushing out of the storm spreads ahead of it. Wind can go from calm to strong gusts in seconds, often from a different direction than the prevailing breeze. An extended awning is lifted from below, which folds lateral arms upward and can pull brackets from the wall.
- Downbursts. A concentrated burst of sinking air can produce damaging straight-line winds over a small area. The National Weather Service classifies a thunderstorm as severe when it produces winds of 58 mph or more, hail of 1 inch or larger, or a tornado.
- Heavy rain. Cloudbursts of an inch or more per hour can pond on a shallow-pitched awning faster than it drains. Water weighs about 62.4 lb per cubic foot, so even a shallow pocket becomes a heavy load. See awning water pooling.
- Hail. Small hail rarely hurts fabric, but large hail can puncture fabric and dent aluminum hoods. See awnings and hail.
- Power loss. Lightning and wind cause outages. A motorized awning that is still extended when the power goes out cannot retract by itself.
Watches, warnings and what they mean for your awning
| Alert or cue | What it means | Awning action |
|---|---|---|
| Thunderstorms in the forecast | Storms possible later in the day | Use the awning, but plan to retract before leaving home or when skies change |
| Severe thunderstorm watch | Conditions favor severe storms in and near the area, usually for several hours | Retract if you will be away or asleep; otherwise stay home and ready to retract immediately |
| Thunder audible, darkening sky, sudden temperature drop | A storm is within roughly 10 miles | Retract now |
| Severe thunderstorm warning | Severe weather is occurring or imminent | Awning should already be in; if not, retract only if you can do it from indoors or within seconds |
| Tornado warning | Tornado detected or indicated | Ignore the awning and take shelter |
Worked example
Thunder is typically audible out to about 10 miles. A storm line moving at 30 mph covers 10 miles in 10 / 30 x 60 = 20 minutes, and its gust front can lead the rain by several miles. If the gust front is 3 miles ahead of the core, it arrives in about (10 - 3) / 30 x 60 = 14 minutes. A motorized awning may take 30 to 90 seconds to retract, and a manual 14 ft unit a minute or two of cranking. That leaves time, but only if you act at the first rumble rather than waiting for rain.
Lightning safety: do not crank a manual awning, stand on a ladder, or handle a metal frame outdoors once lightning is close. The National Weather Service advises going indoors when thunder roars and waiting 30 minutes after the last thunder before going back out. Retract early so you are never choosing between the awning and your safety.
The thunderstorm checklist
Run through this list whenever storms are forecast and you will not be watching the sky. It takes a few minutes for a typical home.
- Retract every retractable awning fully. A partly retracted awning still catches wind. Make sure the front bar seats evenly.
- Raise drop shades and solar screens. Screens in side tracks resist wind better than free-hanging ones, but most should still be raised. Free-hanging screens can swing into windows.
- Remove side panels, valance clips and add-ons such as string lights, hanging planters and privacy curtains attached to awning frames.
- Retract pergola canopies and freestanding awnings. Freestanding frames need their ballast or anchors checked; their canopies should be closed.
- Remove manual crank handles and bring them indoors so they cannot swing against the wall or glass.
- Check fixed awnings for debris on top, clogged drainage edges and loose lacing. Clear leaves that could block runoff.
- Secure loose furniture under and around the awning. Umbrellas, cushions and planters become projectiles in a gust front.
- Decide on power for motorized units. If you are leaving for days, retract and switch off the circuit so a sensor fault cannot extend the awning.
- Close windows under awnings where wind-driven rain can enter.
Motorized awnings and wind sensors in storms
A wind or motion sensor is the best backup for the storm you did not see coming, but it has limits that matter specifically in thunderstorms:
- Reaction time. Sensors trigger after wind exceeds a threshold, often after averaging over a few seconds to avoid false alarms. Add the retraction time and the awning is exposed to the first gusts for most of a minute.
- Thresholds set too high. A sensor set at the top of its range may not trigger until damage is likely. Set it on the cautious side and test it at the start of each season. Setup and testing are covered in awning wind and sun sensors, and faults in awning sensor troubleshooting.
- Power dependence. Most sensors and all AC tubular motors need mains power to retract. If the storm knocks out power before the gust front arrives, nothing happens.
- Sun sensors can work against you. On hot, bright afternoons before storms, an automatic sun program can extend the awning just as storms are developing. Disable sun automation on storm days or confirm the wind sensor overrides it.
- Smart home rules. Some owners link awnings to weather services through a hub. Use forecast-based rules to retract early, never to extend.
Know the manual override for your motor before you need it. If the awning is out during an outage, the procedure is in awning manual override.
A storm day timeline
- Morning forecast check. If storms are possible, plan to retract before leaving the house. Disable sun automation for the day.
- Severe thunderstorm watch issued. Retract if no one will be home. Bring in cranks, cushions and loose items. Note the likely arrival window.
- Storm visible on radar within about 30 miles, or a warning issued for a nearby county. Retract everything now and finish the checklist.
- First thunder or sudden wind shift. Go indoors. Do not go back out for the awning if it means standing in the open with lightning nearby.
- During the storm. If an awning was left out and is being damaged, let it go. Do not try to hold or crank it in high wind.
- 30 minutes after the last thunder. Inspect before extending again.
If the awning was caught out
Retractables caught extended in a storm often look fine but have hidden damage. Before you extend it again:
- Look at the brackets first. Check for gaps between the bracket and the wall, cracked mortar or stucco, or fasteners that have backed out. A loosened anchor is the most dangerous hidden fault. See awning broken bracket.
- Check the arms. Sight along each arm for bends and compare the two sides. Uneven folding or an arm that will not close fully points to bending; see awning arms won't close.
- Check the front bar and roller. A twisted front bar makes the awning roll crooked.
- Inspect the fabric. Look for torn seams, stretched pockets from ponding and wear at the front bar.
- Dry it. If it was retracted wet, extend it on the next dry day for a few hours to prevent mildew.
- Run it slowly once. Watch both arms through a full cycle. Stop at any grinding, binding or uneven roll.
For anything structural, the costs of common repairs are in awning repair cost.
Building a plan that fits your household
Retract-early households: if you are often away during afternoons when summer storms build, the most reliable plan is to retract every time you leave, add a cautious wind sensor, and disable sun automation in storm season. Home-most-of-the-day households: you can leave the awning out on unsettled days, but keep alerts on and act at the first thunder. Second homes and rentals: leave awnings retracted and powered off between visits, and give guests written instructions with a single rule: retract when leaving or when storms are forecast. If storms in your area are frequent and violent, consider whether a fixed awning or patio cover suits you better; see retractable vs fixed awnings.
Frequently asked questions
Should I retract my awning during a thunderstorm?
Yes, and ideally before it arrives. Thunderstorm gust fronts can bring sudden winds of 40 mph or more ahead of the rain, far above the roughly 20 to 25 mph at which most retractable fabric awnings should be closed. Retract when storms are forecast and you will be away, or at the first thunder if you are home.
Will my wind sensor protect the awning in a storm?
It helps, but it is a backup. Sensors react after wind rises past a threshold, and retraction then takes up to a minute or so, so the first gusts still hit the awning. Sensors and motors also need power, which storms often cut. Retract manually when storms are forecast and use the sensor for surprises.
Can I leave my awning out in a light summer shower?
A light shower with no wind is usually fine if the awning has enough pitch to drain, commonly at least about 14 degrees. The risk with thunderstorms is not the rain but the gusts that come with them. If thunder is audible or the sky is darkening quickly, retract rather than waiting to see how heavy the rain gets.
What should I check after a storm before using my awning again?
Check the brackets and the wall around them for loosened fasteners or cracks, sight along the arms and front bar for bends, inspect the fabric for tears and stretched pockets, and dry it if it was retracted wet. Then extend it slowly once while watching both arms. Stop and get it inspected if anything binds or rolls unevenly.
Is it safe to crank a manual awning in when lightning is nearby?
No. Standing outdoors handling a metal crank and frame when lightning is close is a real risk. The National Weather Service advises going indoors when you hear thunder and waiting 30 minutes after the last thunder. Retract early enough that you never face that choice, and accept that an awning left out may be damaged.
Sources and further reading
- National Weather Service: severe thunderstorm watch and warning definitions and severe criteria
- National Weather Service: lightning safety guidance ("When thunder roars, go indoors")
- NOAA National Severe Storms Laboratory: Severe Weather 101, damaging winds and downbursts
- European Committee for Standardization: EN 13561, external blinds and awnings performance requirements including safety
- Somfy: wind sensor installation and operating instructions
How we write our guides: figures are typical US ranges checked against manufacturer documentation, published standards and installer pricing. Read our editorial standards. Spotted an error or outdated detail? Request a correction.