![]() Since hail can cause the rainfall estimates to be higher than what is actually occurring, steps are taken to prevent these high dBZ values from being converted to rainfall. While the radar is out of service, adjacent radar stations will be available for forecasters, including the terminal Doppler weather radar at Bush Intercontinental Airport and Hobby Airport. Partly because of its common use by television meteorologists in on-air weather reporting, the specific term 'Doppler Radar' has erroneously become popularly synonymous with the type of radar used in meteorology. ![]() Hail is a good reflector of energy and will return very high dBZ values. The US Weather Bureaus first experimental Doppler weather radar unit was obtained from the US Navy in the 1950s. These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. Depending on the type of weather occurring and the area of the U.S., forecasters use a set of rainrates which are associated to the dBZ values. The higher the dBZ, the stronger the rainrate. Typically, light rain is occurring when the dBZ value reaches 20. The scale of dBZ values is also related to the intensity of rainfall. The value of the dBZ depends upon the mode the radar is in at the time the image was created. ![]() Notice the color on each scale remains the same in both operational modes, only the values change. The other scale (near left) represents dBZ values when the radar is in precipitation mode (dBZ values from 5 to 75). One scale (far left) represents dBZ values when the radar is in clear air mode (dBZ values from -28 to +28). Each reflectivity image you see includes one of two color scales. The dBZ values increase as the strength of the signal returned to the radar increases. So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). "Reflectivity" is the amount of transmitted power returned to the radar receiver. See the complete 12-month weather predictions in The 2024 Old Farmer's Almanac.The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. Expect a tropical storm in mid-September. September and October will be warmer than normal, with less rain than normal north and more south. Rainfall will be above normal, with tropical storms possible in mid-July and late August. Summer will be cooler than normal north, hotter south, and hottest in late June, late July, and mid-August. April and May will be cool north and warm south, with more rain than usual. Best snow chances (north) will occur in late December and late January. Precipitation and snow will be above normal. It will be coldest in early and late December, early and late January, and mid-February. Winter will be colder than normal north and warmer south. The 12-Month Long-Range Weather Report From The 2024 Old Farmer's Almanac ![]() January 2024 Long Range Weather Forecast for Texas-Oklahoma Dates Rainy periods, some snow north quite cold 16 day local surf forecasts for Galveston. ECMWF, WRF, GFS, NAM, NEMS and other forecast. Daily Forecast Daily Calendar Forecast Calendar Detailed Forecast Detailed Nov. Enter Your Location Free 2-Month Weather Forecast December 2023 Long Range Weather Forecast for Texas-Oklahoma Dates Meteogram, airgram, wind, clouds, temperature, humidity and dew point forecast. See the latest Texas Doppler radar weather map including areas of rain, snow and ice. Get the latest weather conditions and forecast for Houston-Galveston, TX.
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