Absolute PWAT
GFS · Run 18Z 14 Oct · +0 h · Valid Wed 18Z 14 Oct
Region Southeast
United States
Europe
The readings under the map are for the whole map, not only the part shown.
GFS · Run 18Z 14 Oct · +0 h · Valid Wed 18Z 14 Oct
Deepest column 68 mm, 295 km WSW of Puerto Vallarta, Mexico
Deepest column 62 mm, 35 km W of Compostela, Mexico
Deepest column 62 mm, 35 km W of Compostela, Mexico
Deepest column 61 mm, 35 km W of Compostela, Mexico
Deepest column 64 mm, 35 km W of Compostela, Mexico
Deepest column 66 mm, 90 km WSW of Santiago Ixcuintla, Mexico
Deepest column 65 mm, 110 km WSW of Tuxpan, Mexico
Deepest column 65 mm, 110 km WSW of Tuxpan, Mexico
Deepest column 63 mm, 65 km SSW of Cozumel, Mexico
Deepest column 63 mm, 55 km S of Colón, Cuba
Deepest column 64 mm, 30 km N of Nautla, Mexico
Deepest column 64 mm, 130 km NE of Veracruz, Mexico
Deepest column 65 mm, 90 km NNE of Nautla, Mexico
Deepest column 66 mm, 140 km NE of Nautla, Mexico
Deepest column 66 mm, 100 km ENE of Tuxpam, Mexico
Deepest column 68 mm, 110 km ENE of Tuxpam, Mexico
Deepest column 67 mm, 195 km ENE of Tuxpam, Mexico
Deepest column 68 mm, 115 km ESE of Ciudad Madero, Mexico
Deepest column 68 mm, 95 km ESE of Ciudad Madero, Mexico
Deepest column 67 mm, 70 km ESE of Ciudad Madero, Mexico
Deepest column 64 mm, 100 km NNE of Tuxpam, Mexico
Deepest column 64 mm, 190 km NNE of Santiago Tuxtla, Mexico
Deepest column 64 mm, 130 km NE of Veracruz, Mexico
Deepest column 65 mm, 150 km NE of Veracruz, Mexico
Deepest column 63 mm, 75 km WNW of Havana, Cuba
Deepest column 62 mm, 40 km NNE of Havana, Cuba
Deepest column 62 mm, 175 km NE of Nautla, Mexico
Deepest column 63 mm, 150 km NE of Tuxpam, Mexico
Deepest column 62 mm, 60 km NNE of Tuxpam, Mexico
Deepest column 63 mm, 75 km SSE of Nassau, The Bahamas
Deepest column 62 mm, 180 km SE of Nassau, The Bahamas
Deepest column 62 mm, 200 km SE of Nassau, The Bahamas
Deepest column 62 mm, 245 km ESE of Nassau, The Bahamas
Deepest column 60 mm at 24.25N 74.5W
Deepest column 60 mm, 80 km NNE of Nagua, Dominican Republic
Deepest column 62 mm, 145 km ENE of Grand Turk, Turks and Caicos Islands
Deepest column 65 mm, 100 km E of Guantánamo, Cuba
Deepest column 66 mm, 95 km WNW of Grand Turk, Turks and Caicos Islands
Deepest column 67 mm, 70 km WNW of Grand Turk, Turks and Caicos Islands
Deepest column 69 mm, 255 km NW of Grand Turk, Turks and Caicos Islands
Deepest column 71 mm at 23.75N 74.75W
Deepest column 73 mm, 105 km ENE of Guantánamo, Cuba
Deepest column 75 mm, 130 km ENE of Banes, Cuba
Deepest column 77 mm, 185 km NNE of Banes, Cuba
Deepest column 76 mm, 225 km SE of Nassau, The Bahamas
Deepest column 78 mm near Nassau, The Bahamas
Deepest column 77 mm, 40 km ESE of Fort Lauderdale, Florida
Deepest column 74 mm, 65 km ESE of Ft. Myers, Florida
Deepest column 74 mm, 50 km SW of Port Charlotte, Florida
Deepest column 75 mm, 95 km SW of Sarasota, Florida
Deepest column 77 mm, 210 km SW of Sarasota, Florida
Deepest column 79 mm, 285 km WNW of Key West, Florida
Deepest column 78 mm, 200 km W of Key West, Florida
Deepest column 81 mm, 150 km WSW of Key West, Florida
Deepest column 78 mm, 130 km WSW of Key West, Florida
Deepest column 77 mm, 90 km NW of Key West, Florida
Deepest column 76 mm, 75 km SSE of Naples, Florida
Deepest column 76 mm, 35 km SW of Homestead, Florida
Deepest column 76 mm near Coral Gables, Florida
Deepest column 78 mm, 90 km SSW of Freeport, The Bahamas
Deepest column 78 mm, 65 km SSE of Freeport, The Bahamas
Deepest column 78 mm, 110 km ENE of Freeport, The Bahamas
Deepest column 78 mm, 185 km ENE of Freeport, The Bahamas
Deepest column 81 mm, 225 km ENE of Freeport, The Bahamas
Deepest column 78 mm, 170 km NE of Nassau, The Bahamas
One GFS run, issued 18Z 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.