Region Midwest
United States
Europe
The readings under the map are for the whole map, not only the part shown.
GFS · Run 00Z 4 Oct · +0 h · Valid Sun 00Z 4 Oct
Deepest column 2.99 in at 20.0N 112.25W
Deepest column 2.99 in at 20.0N 112.75W
Deepest column 3.01 in at 20.0N 113.0W
Deepest column 2.99 in at 20.25N 113.5W
Deepest column 3.02 in at 20.5N 115.0W
Deepest column 3.06 in at 20.0N 114.0W
Deepest column 3.00 in at 20.25N 114.5W
Deepest column 3.00 in at 20.25N 116.5W
Deepest column 3.01 in at 20.0N 117.0W
Deepest column 2.99 in at 21.25N 117.0W
Deepest column 2.94 in at 20.5N 118.75W
Deepest column 2.94 in at 21.0N 119.0W
Deepest column 2.94 in at 20.0N 119.5W
Deepest column 2.92 in at 20.25N 119.0W
Deepest column 2.91 in at 21.0N 119.5W
Deepest column 2.92 in at 21.5N 120.0W
Deepest column 2.89 in at 20.75N 121.75W
Deepest column 2.87 in at 21.0N 123.0W
Deepest column 2.84 in at 21.0N 123.75W
Deepest column 2.83 in at 21.25N 124.75W
Deepest column 2.99 in at 21.75N 92.75W
Deepest column 2.89 in, 180 mi WNW of Halachó, Mexico
Deepest column 2.96 in at 22.25N 92.5W
Deepest column 3.06 in at 23.0N 92.5W
Deepest column 3.04 in at 23.5N 92.0W
Deepest column 3.04 in at 24.75N 91.75W
Deepest column 2.95 in at 26.25N 91.25W
Deepest column 2.89 in, 95 mi S of Houma, Louisiana
Deepest column 2.81 in, 20 mi S of Slidell, Louisiana
Deepest column 2.73 in, 35 mi N of Nautla, Mexico
Deepest column 2.66 in, 25 mi NE of Nautla, Mexico
Deepest column 2.76 in, 170 mi WSW of Puerto Vallarta, Mexico
Deepest column 2.69 in, 50 mi SW of Escuinapa, Mexico
Deepest column 2.69 in, 20 mi WNW of Tecuala, Mexico
Deepest column 2.67 in, 35 mi WSW of Tecuala, Mexico
Deepest column 2.76 in at 20.0N 108.75W
Deepest column 2.80 in at 20.25N 108.5W
Deepest column 2.88 in, 160 mi SSE of Cabo San Lucas, Mexico
Deepest column 2.89 in, 160 mi SSE of Cabo San Lucas, Mexico
Deepest column 2.93 in at 20.0N 108.75W
Deepest column 2.79 in, 135 mi SSE of Cabo San Lucas, Mexico
Deepest column 2.80 in at 20.0N 109.25W
Deepest column 2.58 in at 20.0N 109.25W
Deepest column 2.56 in, 60 mi WSW of Altata, Mexico
Deepest column 2.64 in, 135 mi SSE of Cabo San Lucas, Mexico
Deepest column 2.69 in, 65 mi NNE of La Paz, Mexico
Deepest column 2.63 in, 65 mi ENE of Cabo San Lucas, Mexico
Deepest column 2.69 in, 65 mi SSW of Los Mochis, Mexico
Deepest column 2.71 in, 35 mi NNW of Los Mochis, Mexico
Deepest column 2.55 in, 40 mi SSE of Huatabampo, Mexico
Deepest column 2.49 in, 50 mi SSW of Guaymas, Mexico
Deepest column 2.33 in near Ciudad Obregon, Mexico
Deepest column 2.32 in near Corpus Christi, Texas
Deepest column 2.37 in, 40 mi NNW of Sabinas Hidalgo, Mexico
Deepest column 2.33 in, 30 mi ESE of Falfurrias, Texas
Deepest column 2.32 in, 30 mi NNE of Edinburg, Texas
Deepest column 2.37 in, 25 mi W of Compostela, Mexico
Deepest column 2.40 in near Tuxpan, Mexico
Deepest column 2.44 in, 50 mi WSW of Tuxpan, Mexico
Deepest column 2.43 in at 24.0N 73.0W
Deepest column 2.45 in, 45 mi SW of Puerto Vallarta, Mexico
Deepest column 2.55 in, 70 mi SW of Puerto Vallarta, Mexico
Deepest column 2.50 in near Altata, Mexico
Deepest column 2.53 in, 90 mi ENE of Nassau, The Bahamas
Deepest column 2.41 in, 95 mi ENE of Cabo San Lucas, Mexico
One GFS run, issued 00Z 4 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.