Property-specific wind analysis

What wind did this property actually see?

Airport weather stations measure wind over open, flat ground. Your property isn’t that. Enter an address and a date range, and ChartTheWind pulls the official station records, adjusts them for the land cover and terrain around that address, and documents every step in a report you can save as a PDF.

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Peak gust by direction · Hurricane Ian, Fort Myers FL · real data

What’s in a report

A documented analysis, not a single number.

Each section shows its inputs and its limits, so a reader can see how the answer was reached and how far to trust it.

01
All the observations
Every record from the nearest official stations (NOAA NCEI and the Iowa Mesonet), time-stamped in UTC, with each value’s source labelled.
02
Local & roof-level wind
Station winds translated to street level (15 ft) and a typical 2.5-story roof (30 ft) using ASCE 7-22 exposure constants.
03
Exposure by direction
Land cover around the property is sampled in each wind direction and classified Exposure B, C or D (USGS NLCD).
04
Terrain profile & Kzt
The upwind elevation profile is checked for hills and escarpments, and the topographic factor Kzt is applied only when the terrain qualifies.
05
NWS event summary
Gusts and sustained winds classified against National Weather Service advisory and warning thresholds, with first, last and peak times.
06
Directional wind rose
Peak gust and sustained wind by compass sector, drawn over satellite imagery of the property.
07
Regime timeline
How the wind direction shifted, and how long each flow pattern persisted, through the event.
08
Regional coherence
Neighbouring stations compared: do their peaks agree in size, timing and direction?
09
Confidence & references
Seven plain-language ratings of how much weight the data can bear, plus methodology and source tables.

How it works

From address to report in a few moments.

Four steps, no sign-up.

Enter an address and dates
Any US address, and any window of up to 92 days since 1990.
We gather the records
Nearby official stations from NOAA NCEI and the Iowa Mesonet. Gaps filled from model data (Open-Meteo) are flagged, never hidden.
We adjust for the site
Land cover and terrain around the address set the exposure and topographic factor, following ASCE 7-22.
You save the report
Read it on screen and download the PDF. Reports aren’t stored, so keep your copy.

A real report

Hurricane Ian, at the Lee County Courthouse.

This is actual output from the tool for 1700 Monroe St, Fort Myers, FL — September 27–28, 2022 — trimmed to fit the page. It is deliberately not a flattering example: it shows what the report does when the data is incomplete.

SAMPLE

Hurricane Ian — Lee County Courthouse, Fort Myers, FL

1700 Monroe St, Fort Myers, FL 33901 · 09-27-2022 → 09-29-2022 · 185 observations

Nearest station

KFMY

Fort Myers, Page Field · 4.0 mi · NCEI-ISD

Peak local gust

60.3 mph

09-28 12:59Z · 8:59 AM EDT · from 100° E

Roof-level at peak

64.0 mph

station gust 58.7 → local 60.3 → roof 64.0

Exposure · Kzt

D · 1.00

for the peak direction · H (10 ft) below minimum 15 ft for Exposure C

Wind through the event

Gust and sustained wind translated to the property. Dashed lines are the National Weather Service gust criteria. The hatched area is where this station has no data.

Local gustLocal sustainedWind AdvisoryHigh Wind Warning

The limit the report flags: KFMY, the nearest station, stopped reporting at 10:29 AM EDT, after a peak gust of 58.7 mph at 8:59 AM EDT. Its neighbours recorded their peaks later: Southwest Florida Intl 67.9 mph at 11:08 AM EDT, and Punta Gorda (21 miles north) 134.6 mph at 4:13 PM EDT. The report doesn’t smooth that over: it rates regional coherence “Moderate” and says so in plain words.

Directional wind rose

Peak gust by compass sector. All the strong wind came from the east and southeast — 108 of 185 observations were from the E sector. In the full report this is drawn over satellite imagery of the property.

NWS event summary

Category	Threshold	Peak	Obs
High Wind Warning	≥58 mph	60.3 mph	1
Wind Advisory	46–57 mph	56.7 mph	15
Elevated Wind (Low Concern)	39–45 mph	44.9 mph	16
Elevated Wind (Sustained)	≥25 mph ≥60 min	37.8 mph	132 min run

Regional observational coherence

Neighbouring stations compared for the same event.

Station	Distance	Peak gust	Peak time (UTC)	Direction
KFMY Fort Myers, Page Field	4.0 mi	58.7 mph	09-28 12:59Z	100° E
KRSW Southwest Florida Intl	10.2 mi	67.9 mph	09-28 15:08Z	128° SE
KPGD Punta Gorda Airport	20.5 mi	134.6 mph	09-28 20:13Z	98° E

Gust spread 75.9 mphPeak-timing spread 7.2 hDirection alignment HighOverall Moderate

Analytical confidence

Seven ratings of how much weight each part of the analysis can bear.

Observation continuityHigh
Terrain characterizationHigh
Exposure persistenceHigh
Topographic applicabilityHigh
Regional coherenceModerate
Station proximityHigh
Source hierarchyHigh

Observation log (excerpt)

Ten of 185 rows, around the peak. Every row carries its source and exposure; the full report lists them all.

Timestamp (UTC)	Src	Station sust.	Local sust.	Station gust	Local gust	Dir	Exp.	Roof level
2022-09-28 12:06	IEM	31.1	31.9	55.2	56.7	98°	D	60.2
2022-09-28 12:11	IEM	27.6	28.3	43.7	44.9	106°	D	47.7
2022-09-28 12:20	IEM	29.9	30.7	50.6	52.0	102°	D	55.2
2022-09-28 12:38	IEM	32.2	33.1	46.0	47.2	102°	D	50.2
2022-09-28 12:42	NCEI-ISD	28.9	29.7	49.4	50.7	100°	D	53.9
2022-09-28 12:59	IEM	36.8	37.8	58.7	60.3	100°	D	64.0
2022-09-28 13:01	IEM	32.2	33.1	49.5	50.8	98°	D	54.0
2022-09-28 13:18	IEM	34.5	35.4	48.3	49.6	99°	D	52.7
2022-09-28 13:20	NCEI-ISD	33.3	34.2	48.3	49.6	100°	D	52.7
2022-09-28 13:32	NCEI-ISD	23.0	23.6	53.0	54.4	130°	D	57.8

Speeds in mph. † gust filled from model data (Open-Meteo) and flagged in the log — 25 of 185 rows in this event. Local = street level (15 ft); roof level = a typical 2.5-story roof (30 ft).

The full report adds the regime timeline, terrain profile, satellite overlay, every observation, and methodology tables.

Now run it for your property.

Your address, your dates. Takes a few moments; no account.

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Pricing

Pay per report. That’s it.

No subscription and no account. One payment runs one report.

Full report

$4.99 per report

Every observation, every section
Local and roof-level wind, exposure and Kzt
NWS events, wind rose, regime timeline
Regional coherence and confidence ratings
Download as PDF

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Same analysis engine
Wind rose for the whole period
First 5 observations only
No events, coherence, terrain or PDF

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Questions

Before you run one.

Who is this for?

Homeowners, roofers, adjusters and engineers who need a documented estimate of the wind at one specific address during one specific event.

How accurate is it?

It translates measured station winds to the site with published methods (ASCE 7-22 exposure constants, NWS thresholds). It is still an estimate: the nearest station can be miles away and stations can fail in a storm, as in the sample above. Every report discloses the station distance, data gaps and any model-filled values, and rates its own confidence.

What addresses and dates work?

US addresses, for any period of up to 92 days since 1990. The period must be in the past.

What do I get, and how do I keep it?

The full report on screen, plus a Download PDF button. Reports are not stored, so save the PDF when it finishes.

What about payment and privacy?

You pay once per report through PayPal. There are no accounts or subscriptions, and this site sets no cookies of its own. We keep only a record of the payment (order ID, amount, time and the PayPal payer email) so a paid report can’t be reused; we do not keep your address or results.

Will an insurer or court accept it?

We can’t promise that. The report is a documented analysis of public weather data, not a substitute for a licensed engineer’s judgment or an official NWS storm report.

See what the wind did at your address.

$4.99 per report · download the PDF · nothing stored.

Run a full report · $4.99 Try the free preview

What wind did this property actually see?

A documented analysis, not a single number.

All the observations

Local & roof-level wind

Exposure by direction

Terrain profile & Kzt

NWS event summary

Directional wind rose

Regime timeline

Regional coherence

Confidence & references

From address to report in a few moments.

Enter an address and dates

We gather the records

We adjust for the site

You save the report

Hurricane Ian, at the Lee County Courthouse.

Hurricane Ian — Lee County Courthouse, Fort Myers, FL

Wind through the event

Directional wind rose

NWS event summary

Regional observational coherence

Analytical confidence

Observation log (excerpt)

Now run it for your property.

Pay per report. That’s it.

Full report

Free preview

Before you run one.

See what the wind did at your address.