Meteograms

Solid lines are model forecasts or ensemble means (including true REFS member statistics where available). Dashed temperature lines are dewpoints and dashed wind lines are gusts; Precipitation and snowfall are drawn as running totals from the chart’s start time (each model rebased to zero there, or at its first valid time if its run starts later), so models with hourly and 6-hourly output are directly comparable; snowfall is its own chart (usually SWE × 10:1 estimates; native snowfall depth only where explicitly supplied, method on hover). Shading is the actual member 10th–90th percentile range, not a confidence interval. No ranges are made from deterministic models or published min/max; ensemble bands are calculated from the members. Hover or tap a chart for values.

The Grid view is a color-coded hourly table for one model at a time (native time steps when a model is not hourly). Times in the columns are Eastern; the run is labeled in Z. A blank or “n/a” cell means that field is not in this station file — it is never filled in. Wind in the grid is shown in mph, converted from the file’s 10-m knots.

Forecasts use each model’s available native output intervals. Rain and snow lines are running totals since the chart’s start time; hover or tap shows the total and the amount in the latest native interval. The “6-h amounts” view puts every model on the same 00/06/12/18Z 6-hour basis as bars. Ensemble shading on totals uses each member’s own running total and is shown only for runs that start inside the window (a rebased member total is not available); otherwise only the mean total is drawn. Model runs can differ; their exact times are shown below. A missing field is a gap, never zero. Grid forecasts are not station observations and are not elevation-corrected. All series are freshly sampled at the METAR catalog coordinates; regional models are masked using their projected grid bounds. Models outside their valid horizon are disabled; old initialization times are labelled stale.