The combination of warm temperatures and high dewpoints will produce heat indices between 105 and 109 degrees today along area beaches north of Port Aransas. HEAT INDEX VALUES BETWEEN 105 AND 109 DEGREES ARE EXPECTED TODAY ALONG AREA BEACHES NORTH OF PORT ARANSAS. For the second Heat Advisory, heat index values up to 110 expected. * WHAT.For the first Heat Advisory, heat index values up to 111. Tracking your local forecast for Houston and all of southeast Texas has never been easier with the FOX 26 Houston Weather App. HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING.HEAT ADVISORY IN EFFECT FROM NOON TO 7 PM CDT SUNDAY. * IMPACTS.Hot temperatures and high humidity may cause heat More * WHERE.Brazoria Islands, Galveston Island and Bolivar Peninsula Counties. HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY. * IMPACTS.Hot temperatures and high humidity may cause heat illnesses to occur. * WHERE.Inland Jackson and Inland Matagorda Counties. * WHERE.Portions of south central and southeast Texas. HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY. 17 days in a row Heat alerts contine today for the 17th day in a row Blazing heat continues Heat advisory in effect until 9pm tonight Deja June A lot of people have forgotten that LAST June was. * WHERE.San Jacinto, Polk, Northern Liberty, Inland Harris, Chambers, Inland Galveston, Southern Liberty, Coastal Harris and Coastal Galveston Counties.
* WHERE.Houston, Trinity, Madison, Walker, Burleson, Brazos, Washington and Grimes Counties. 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.HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT SUNDAY. Hail is a good reflector of energy and will return very high dBZ values. 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). Click a JustWeather home city below and youre ready to go > Detroit, Michigan > Houston, Texas > Jacksonville, Florida > Miami, Florida > Orlando. This view is similar to a radar application on a phone that provides radar, current weather, alerts and the forecast for a location. One scale (far left) represents dBZ values when the radar is in clear air mode (dBZ values from -28 to +28). This view combines radar station products into a single layer called a mosaic and storm based alerts. 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.
The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan.
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