iWindsurf.com - Wind Forecasts

kiter? see iKitesurf.com

We're curious: Are you a windsurfer or a kiter? I'm a windsurfer. I'm a kiter. I do both!

Important Notice: You are viewing our classic website (www.iWindsurf.com).
You can also now check our new website (Global.iWindsurf.com). Both are available to you! More info

Hi guest · Get your free membership now · Log In ·

Alcatraz
> Current Wind Graph
> Meteogram
> Onsite Report
> Wind Yesterday
> Last 7 Days
> Wind Archive
> Tides
> Local Info
> Sensor Notes

CA- sf north bay

Human Forecasts
> Daily Briefing
> Baja Guide
> Forecast Blog
> Extended Disc.

Real-Time Data
> Dynamic Map
> Wind Obs Map
> Radar + Satellite Map
> Wind Obs Summary
> Pressure Report

Computer Forecasts
> Model Tables
> Wind Vector Fx Map
> Wind FlowViz Fx Map
> Tidal Currents Map

More Maps

>Radar
>Satellite
>General Weather
>Comfort Index
>Tidal Heights
>Water Temp
>Wind Obs + Gust

Other Resources

>Coastal Waters Forecast
>Sea Surface Temps
>Swell Model Map

>Wind Cams

Watches/Warnings
>None Active

Home : xt_USA : xt_California : CA- san francisco : CA- sf north bay : Alcatraz : Forecast Graphs

Human Meteorologist Forecasts: Today's Briefing Extended Discussion

Computer Model Data: 4/23 | 4/24 | 4/25 | 4/26 | 4/27 | 4/28 | 4/29 | >>Wind Obs Map<<

Alcatraz Computer Forecast Table - Meteogram

Help us improve this product by taking the survey!

Quick Look
More Hours

WRAMS 1km - San Francisco

WRAMS 8km - California

NAM 12km

GFS 0.5 Deg

Help

Date	Wednesday, April 23								Thursday, April 24
Time		5am	8am	11am	2pm	5pm	8pm	11pm	2am	5am	8am	11am	2pm	5pm	8pm	11pm
Wind (mph)		3	3	6	9	12	10	7	5	4	4	8	12	13	10	6
Direction
Temperature (F)		49	50	55	58	57	55	53	52	52	52	55	55	55	53	52
Model	NAM 12km								NAM 12km
Model Run		04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z
Visibility (mi)		15	15	15	15	15	15	15	13	8	8	8	13	15	15	15
Precipitation (in)
Cloud Cover (%)		22	46	97	18			40	100	72	52	60	96	100	100	100
Pressure (mb)		1020	1019	1020	1020	1019	1019	1020	1020	1019	1019	1019	1018	1017	1016	1016
Additional Data	Show Additional Data
Date	Friday, April 25								Saturday, April 26
Time	2am	5am	8am	11am	2pm	5pm	8pm	11pm	2am	5am	8am	11am	2pm	5pm	8pm	11pm
Wind (mph)	5	5	9	12	13	15	15	13	12	12	11	10	18	20	12	9
Direction
Temperature (F)	52	52	51	52	52	52	50	48	46	44	49	56	60	57	50	49
Model	NAM 12km								GFS 0.5 Deg
Model Run	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z
Visibility (mi)	15	13	13	11	15	15	15	15
Precipitation (in)
Cloud Cover (%)	100	100	100	100	29	38
Pressure (mb)	1015	1013	1012	1013	1013	1012	1013	1014	1013	1014	1016	1017	1016	1016	1017	1020
Additional Data	Show Additional Data
Date	Sunday, April 27								Monday, April 28
Time	2am	5am	8am	11am	2pm	5pm	8pm	11pm	2am	5am	8am	11am	2pm	5pm	8pm	11pm
Wind (mph)	6	4	8	8	6	11	8	7	7	8	6	7	11	12	10	10
Direction
Temperature (F)	50	51	52	55	60	62	54	51	49	48	54	64	70	70	59	56
Model	GFS 0.5 Deg								GFS 0.5 Deg
Model Run	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z
Visibility (mi)
Precipitation (in)
Cloud Cover (%)						3
Pressure (mb)	1019	1019	1019	1020	1020	1019	1020	1021	1021	1021	1022	1022	1021	1019	1019	1020
Additional Data	Show Additional Data
Date	Tuesday, April 29								Wednesday, April 30
Time	2am	5am	8am	11am	2pm	5pm	8pm	11pm	2am	5am	8am	11am	2pm	5pm
Wind (mph)	6	4	4	5	8	11	9	6	4	4	5	4	10	12
Direction
Temperature (F)	54	53	63	73	78	77	63	58	56	55	64	74	78	74
Model	GFS 0.5 Deg								GFS 0.5 Deg
Model Run	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z	04/23 12z
Visibility (mi)
Precipitation (in)
Cloud Cover (%)
Pressure (mb)	1019	1019	1020	1020	1018	1016	1015	1016	1014	1014	1015	1015	1013	1011
Additional Data	Show Additional Data