Absolute PWAT
GFS · Run 12Z 14 Oct · +0 h · Valid Wed 12Z 14 Oct
Region Mid-Atlantic
United States
Europe
The readings under the map are for the whole map, not only the part shown.
GFS · Run 12Z 14 Oct · +0 h · Valid Wed 12Z 14 Oct
Deepest column 68 mm, 220 km WSW of Puerto Vallarta, Mexico
Deepest column 70 mm, 295 km WSW of Puerto Vallarta, Mexico
Deepest column 71 mm at 20.0N 108.5W
Deepest column 66 mm at 20.0N 108.5W
Deepest column 66 mm at 20.0N 108.75W
Deepest column 62 mm near Santiago Ixcuintla, Mexico
Deepest column 65 mm near Tecuala, Mexico
Deepest column 63 mm near Tecuala, Mexico
Deepest column 65 mm, 45 km SW of Cozumel, Mexico
Deepest column 67 mm at 20.0N 108.5W
Deepest column 69 mm at 20.0N 108.75W
Deepest column 70 mm at 20.25N 109.0W
Deepest column 70 mm, 215 km SSE of Cabo San Lucas, Mexico
Deepest column 71 mm, 185 km S of Cabo San Lucas, Mexico
Deepest column 73 mm, 100 km S of Cabo San Lucas, Mexico
Deepest column 72 mm, 35 km WNW of Cabo San Lucas, Mexico
Deepest column 65 mm, 125 km ENE of Nautla, Mexico
Deepest column 66 mm, 165 km ENE of Nautla, Mexico
Deepest column 66 mm, 155 km NE of Veracruz, Mexico
Deepest column 64 mm, 130 km NE of Veracruz, Mexico
Deepest column 62 mm, 195 km NNW of Paraíso, Mexico
Deepest column 63 mm, 110 km ENE of Freeport, The Bahamas
Deepest column 66 mm, 40 km ENE of Havana, Cuba
Deepest column 65 mm near Puerto Vallarta, Mexico
Deepest column 64 mm, 70 km SW of Puerto Vallarta, Mexico
Deepest column 62 mm, 135 km ENE of Tuxpam, Mexico
Deepest column 63 mm, 30 km SSE of Corpus Christi, Texas
Deepest column 64 mm near Tecuala, Mexico
Deepest column 65 mm, 75 km ESE of San Fernando, Mexico
Deepest column 62 mm, 45 km SSW of Escuinapa, Mexico
Deepest column 63 mm, 40 km NE of Tamazunchale, Mexico
Deepest column 62 mm, 45 km SW of Santiago Ixcuintla, Mexico
Deepest column 61 mm near Santiago Ixcuintla, Mexico
Deepest column 62 mm, 65 km NNE of Nautla, Mexico
Deepest column 64 mm near Puerto Vallarta, Mexico
Deepest column 67 mm near Puerto Vallarta, Mexico
Deepest column 69 mm, 45 km NW of Puerto Vallarta, Mexico
Deepest column 63 mm, 65 km NW of Puerto Vallarta, Mexico
Deepest column 63 mm, 45 km NW of Puerto Vallarta, Mexico
Deepest column 62 mm, 35 km W of Compostela, Mexico
Deepest column 64 mm, 65 km NW of Puerto Vallarta, Mexico
Deepest column 63 mm at 25.25N 71.25W
Deepest column 65 mm at 24.0N 67.0W
Deepest column 65 mm at 25.0N 69.0W
Deepest column 65 mm at 24.5N 70.75W
Deepest column 66 mm at 28.5N 67.5W
Deepest column 68 mm, 245 km E of Grand Turk, Turks and Caicos Islands
Deepest column 69 mm at 24.0N 68.25W
Deepest column 70 mm at 25.25N 67.75W
Deepest column 70 mm at 26.25N 66.25W
Deepest column 69 mm at 26.0N 65.0W
Deepest column 65 mm, 245 km NNW of Hamilton, Bermuda
Deepest column 62 mm at 21.25N 65.0W
Deepest column 61 mm, 160 km SSW of Nassau, The Bahamas
Deepest column 63 mm, 100 km N of Morón, Cuba
Deepest column 63 mm, 70 km SW of Puerto Vallarta, Mexico
Deepest column 61 mm, 115 km WSW of Puerto Vallarta, Mexico
Deepest column 62 mm, 110 km SW of Puerto Vallarta, Mexico
Deepest column 67 mm, 80 km SSW of Puerto Vallarta, Mexico
Deepest column 64 mm, 75 km S of Puerto Vallarta, Mexico
Deepest column 63 mm near Pánuco, Mexico
Deepest column 63 mm, 40 km ENE of Ciudad Madero, Mexico
Deepest column 65 mm near Nautla, Mexico
Deepest column 67 mm near Tuxpam, Mexico
Deepest column 64 mm, 70 km SSE of Tampico, Mexico
One GFS run, issued 12Z 14 Oct — played forward 6 hours at a time, from the analysis to 384 hours out.
Methodology
PWAT — precipitable water — is how much water vapour the air overhead holds, as the depth of water it would make if it all fell at once.
Six-hourly to 384 hours. GFS forecasts out to 384 hours.
The colours are a depth scale, the same everywhere: the cream band is a depth, not a normal. The same column is deep for Salt Lake City and shallow for Miami, so this map cannot say whether the air is unusual — the Relative to normal chart ranks each place against its own record, and that is the one to read for that.
GFS files this field as PWAT and ECMWF as total column water vapour, the same quantity. Uncorrected model output.
This map is drawn from model output we store ourselves, not from anyone's picture of it, and is based on data and products of NOAA. The per-city read of the same day — which cities the models are fighting about, and what the discussion makes of it — is on the national page. Every model's full forecast for any of these cities, or anywhere else, is in the beta: request an invite; it's free during the beta.
Sources and licences
- NOAA: GFS, from NOAA's NOMADS server. US government data, not subject to copyright (NOAA/NWS terms of use).
What we change: each field is cropped to the frame these maps share when we download it, and each map then smooths, contours, differences or ranks those numbers as its Methodology says. These are our maps of the providers' numbers, not their products, and none of them has reviewed or endorsed this site.
Coastlines, borders, lakes and place names: Natural Earth, public domain.