Foreweather

Step 1

Choose baseline EPW

Upload baseline EPW file

The system automatically reads LOCATION metadata directly from the EPW header.

Drop an .epw file here, or pick one:

Supported format: .epw (EnergyPlus Weather)

Upload an EPW file to see location details

Map preview will appear here

Step 2

Configure climate scenarios

One EPW is generated per ticked combination. Tick several at once to batch-process scenarios for the same site.

▾ What are climate scenarios?

Loading scenario catalog…

Quick start:

Advanced climate processing settings Morphing · solar decomposition · psychrometrics

Morphing method ?

BTWS Recommended Preserves thermodynamic consistency and performs well for building-energy simulations under future scenarios. Belcher (classical) Shift-and-stretch on monthly means only. Use when reproducing legacy studies or when no Δmax / Δmin signal is available.

Solar decomposition ?

Erbs Recommended for hourly EPW Standard building-energy approach for converting GHI into DNI and DHI. DISC (pressure-aware) More accurate in clear-sky and high-radiation climates; needs reliable pressure data.

Wet-bulb solver ?

Stull closed-form Recommended Fast and stable approximation for psychrometric reconstruction. Iterative (pressure-aware) Use for high-altitude sites or when oversaturation warnings appear.

Step 3

Generate future weather

Each ticked scenario runs the six-step physical-closure pipeline and produces a stand-alone EPW.

Urban overlay (UHI ~2.5 K) Pick a baseline city and at least one unlocked scenario to enable.

Pipeline execution & processing status

Scenario	Period	Status	Progress	Quality	Download

Step 4

Quality assessment

EPW validation report for the selected scenario.

▾ Scientific validation details

Step 5

Building energy simulation

Real EnergyPlus annual results for the bundled DOE 5ZoneAirCooled reference small office (463.6 m², VAV with hot-water reheat), pre-computed against every baseline + future EPW combination the demo can serve. Custom IDF uploads and on-demand EnergyPlus runs are available in the licensed build — contact us for access.

Adaptive-capacity loop (upsize HVAC against future) Include every ensemble member

Generate future weather first to enable.

Per-EPW energy outcome

EPW	Heating (MJ)	Cooling (MJ)	Electric (MJ)	Peak cool (kW)	Unmet hours	Δ Electric vs baseline

Adaptive-capacity sizing (future weather)

Future EPW	Iterations	Cooling cap. ratio	Heating cap. ratio	Final cooling (W)	Final heating (W)	Converged

Choose baseline EPW

Configure climate scenarios

Morphing method ?

Solar decomposition ?

Wet-bulb solver ?

Generate future weather

Pipeline execution & processing status

Ensemble uncertainty fan (ΔT, monthly)

Quality assessment

✓ Checks Passed

⚠ Warnings

⚠ Review Recommended

Recommendations

Building energy simulation

Per-EPW energy outcome

Adaptive-capacity sizing (future weather)