In the public interest, LBREPORT.com provides detailed weather information, including live Doppler radar and satellite images from the National Weather Service (NWS) plus explanatory details and further weather links below.
Santa Ana Mtn. in-motion Doppler Radar:
Updated Doppler Radar images are below. If the Santa Ana Mtn. radar site is unavailable, the Sulphur Mountain site (near Ojai) is a useful backup. Explanatory details are below the map. Click refresh or reload on your browser for most recent image.
Santa Ana Mtn. NOAA Doppler radar Sulphur Mtn. NOAA Doppler radar
If both sites are unavailable, try Alternate NOAA regional radar sites.
The Doppler Radar also lets you judge relative rainfall amounts [NWS text & graphics]:
65 16+ 60 8.00 55 4.00 52 2.50 47 1.25 41 0.50 36 0.25 30 0.10 20 Trace
What do the colors mean in the reflectivity images?
The colors are the different values of energy that are reflected back toward the radar. Called echoes, the reflected intensities are measured in dBZ (decibels of z). As the strength of the signal returned to the radar increases the dBZ values increases. The Doppler radar does not determine where rain is located, only areas of returned energy.
The "dB" in the dBz scale is logarithmic and has no numerical value, but is used only to express a ratio. The "z" is the ratio of the density of water drops (measured in millimeters, raised to the 6th power) in each cubic meter (mm^6/m^3). Mathematically:dBz= 10 * log (z/z0) Where z = reflectivity factor and Z0 is defined to be 1 mm^6/m^3
When the "z" is large (many drops in a cubic meter), the reflected power is large. A small "z" means little returned energy. In fact, "z" can be less than 1 mm^6/m^3 and since it is logarithmic, dBz values will become negative, as often in the case when the radar is in clear air mode and indicated by earthtone colors.The scale of dBZ values is also related to the intensity of rainfall. Typically, light rain is occurring when the dBZ value reaches 20. The higher the dBZ, the stronger the rainrate. Learn more about these reflectivity color scales.
The National Weather Service has also produced the Doppler Radar overlaid with mountains, rivers, county lines, weather warnings, an explanatory legend and links to other NWS/NOAA related products, To access it, click here. [end MWS text]
Note on displayed times
"UTC" (displayed on the image) is "Universal time" (formerly called "Greenwich Mean Time"). It's eight hours ahead of Pacific Standard Time (in the winter, fall back) and seven hours ahead of Pacific Daylight Time (in the summer, spring ahead). That means "15:15 UTC" is 7:15 a.m. Pacific Standard Time (during the winter) and 8:15 a.m. Pacific Daylight Time (during the summer).
Satellite Images Infrared (2 km) (visible at night)
To see the infrared imagery in motion, Animation of infrared radar satellite image [2 km]
Water Vapor (color enhanced imagery):
To see Water Vapor animated, click here.
(Nat'l Weather Service Text) Color enhanced imagery is a method meteorologists use to aid them with satellite interpretation. The colors enable a meteorologist to easily and quickly see features which are of special interest to them. Usually they look for high clouds or areas with a large amount of water vapor...In a water vapor image, white areas indicate moisture and dark areas indicate little or no moisture, so the colors typically highlight areas with large amounts of moisture.
Additional Weather Related Links
LBReport.com is also pleased to provide these additional weather-related links:
Latest 7 Day Forecasts / Conditions / Details
Shoreline ELB / Lakewood Marine LGB Monitor Weather Details Rain totals (LA County Dept. Public Works -- map) Rain totals (text) Updated Hourly Wind Chill Index Nationwide Map Updated Hourly Heat Index Nationwide Map Weather Conversion Calculator (Heat Index, Wind Chill & More) 2008: See AQMD Interactive Carcinogenic Risk Map, Part of Updated Multiple Air Toxics Exposure Study With Modeled Cancer Risk
Note on National Weather Service/NOAA imagery: Click refresh or reload on your browser for most recent image. The National Weather Service advises:The information on government servers are in the public domain, unless specifically annotated otherwise, and may be used freely by the public. Before using information obtained from this server special attention should be given to the date & time of the data and products being displayed. This information shall not be modified in content and then presented as official government material.
The user assumes the entire risk related to its use of this data. NWS is providing this data "as is," and NWS disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will NWS be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or lost profit resulting from any use or misuse of this data. The Doppler Radar and satellite images on LBReport.com are via the NWS and not subject to copyright protection. NWS provides additional information on its data, and a disclaimer, which can be viewed by clicking here.
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