Absolute PWAT
GFS · Run 18Z 14 Oct · +0 h · Valid Wed 18Z 14 Oct
Region Northwest
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 2.69 in, 185 mi WSW of Puerto Vallarta, Mexico
Deepest column 2.46 in, 25 mi W of Compostela, Mexico
Deepest column 2.44 in, 25 mi W of Compostela, Mexico
Deepest column 2.39 in, 25 mi W of Compostela, Mexico
Deepest column 2.50 in, 25 mi W of Compostela, Mexico
Deepest column 2.59 in, 55 mi WSW of Santiago Ixcuintla, Mexico
Deepest column 2.56 in, 70 mi WSW of Tuxpan, Mexico
Deepest column 2.54 in, 70 mi WSW of Tuxpan, Mexico
Deepest column 2.47 in, 40 mi SSW of Cozumel, Mexico
Deepest column 2.47 in, 35 mi S of Colón, Cuba
Deepest column 2.53 in, 20 mi N of Nautla, Mexico
Deepest column 2.52 in, 80 mi NE of Veracruz, Mexico
Deepest column 2.56 in, 55 mi NNE of Nautla, Mexico
Deepest column 2.60 in, 85 mi NE of Nautla, Mexico
Deepest column 2.62 in, 60 mi ENE of Tuxpam, Mexico
Deepest column 2.68 in, 70 mi ENE of Tuxpam, Mexico
Deepest column 2.63 in, 120 mi ENE of Tuxpam, Mexico
Deepest column 2.69 in, 75 mi ESE of Ciudad Madero, Mexico
Deepest column 2.67 in, 60 mi ESE of Ciudad Madero, Mexico
Deepest column 2.64 in, 45 mi ESE of Ciudad Madero, Mexico
Deepest column 2.52 in, 60 mi NNE of Tuxpam, Mexico
Deepest column 2.54 in, 120 mi NNE of Santiago Tuxtla, Mexico
Deepest column 2.54 in, 80 mi NE of Veracruz, Mexico
Deepest column 2.54 in, 95 mi NE of Veracruz, Mexico
Deepest column 2.48 in, 50 mi WNW of Havana, Cuba
Deepest column 2.45 in, 25 mi NNE of Havana, Cuba
Deepest column 2.46 in, 110 mi NE of Nautla, Mexico
Deepest column 2.49 in, 90 mi NE of Tuxpam, Mexico
Deepest column 2.45 in, 40 mi NNE of Tuxpam, Mexico
Deepest column 2.50 in, 45 mi SSE of Nassau, The Bahamas
Deepest column 2.45 in, 115 mi SE of Nassau, The Bahamas
Deepest column 2.44 in, 125 mi SE of Nassau, The Bahamas
Deepest column 2.44 in, 150 mi ESE of Nassau, The Bahamas
Deepest column 2.35 in at 24.25N 74.5W
Deepest column 2.37 in, 50 mi NNE of Nagua, Dominican Republic
Deepest column 2.46 in, 90 mi ENE of Grand Turk, Turks and Caicos Islands
Deepest column 2.58 in, 65 mi E of Guantánamo, Cuba
Deepest column 2.59 in, 60 mi WNW of Grand Turk, Turks and Caicos Islands
Deepest column 2.62 in, 45 mi WNW of Grand Turk, Turks and Caicos Islands
Deepest column 2.73 in, 160 mi NW of Grand Turk, Turks and Caicos Islands
Deepest column 2.78 in at 23.75N 74.75W
Deepest column 2.88 in, 65 mi ENE of Guantánamo, Cuba
Deepest column 2.96 in, 80 mi ENE of Banes, Cuba
Deepest column 3.02 in, 115 mi NNE of Banes, Cuba
Deepest column 2.98 in, 140 mi SE of Nassau, The Bahamas
Deepest column 3.05 in near Nassau, The Bahamas
Deepest column 3.05 in, 25 mi ESE of Fort Lauderdale, Florida
Deepest column 2.91 in, 40 mi ESE of Ft. Myers, Florida
Deepest column 2.92 in, 30 mi SW of Port Charlotte, Florida
Deepest column 2.94 in, 60 mi SW of Sarasota, Florida
Deepest column 3.01 in, 130 mi SW of Sarasota, Florida
Deepest column 3.10 in, 175 mi WNW of Key West, Florida
Deepest column 3.06 in, 125 mi W of Key West, Florida
Deepest column 3.18 in, 95 mi WSW of Key West, Florida
Deepest column 3.07 in, 80 mi WSW of Key West, Florida
Deepest column 3.02 in, 55 mi NW of Key West, Florida
Deepest column 2.98 in, 50 mi SSE of Naples, Florida
Deepest column 2.98 in, 25 mi SW of Homestead, Florida
Deepest column 2.99 in near Coral Gables, Florida
Deepest column 3.06 in, 55 mi SSW of Freeport, The Bahamas
Deepest column 3.08 in, 40 mi SSE of Freeport, The Bahamas
Deepest column 3.07 in, 65 mi ENE of Freeport, The Bahamas
Deepest column 3.07 in, 115 mi ENE of Freeport, The Bahamas
Deepest column 3.17 in, 140 mi ENE of Freeport, The Bahamas
Deepest column 3.08 in, 105 mi 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.