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Heavy Rain, Flooding Possible From Remnants of Tropical Storm Cindy

The remnants of Tropical Storm Cindy will spread heavy rain into the Tennessee and Ohio Valleys today - and into the Appalachians and Mid-Atlantic tonight. Flash flooding is possible in these areas. Strong to severe thunderstorms are also possible in these areas. Flash flooding is life threatening. Never drive your car across flooded roadways. Read More >

Additional isolated-scattered thunderstorm development possible this afternoon and evening as a cold front approaches. Main threats will be downburst winds in excess of 60 MPH and hail to 1" in diameter. Storms will move very slowly south-southwestward at around 10 mph.
A Heat Advisory is in effect from Noon through 7 PM today for much of North and Central Texas. The heat and humidity will combine to make it feell like it is 105 to 110 degrees. Take extra precautions if working or spending time outdoors. Take extra precautions if you work or spend time outside. When possible...reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water. Check on persons with health problems and the elderly as they are the most susceptible to heat exhaustion and heat stroke.
Isolated to perhaps scattered thunderstorms are possible this afternoon and evening ahead of a southward moving cold front. These storms will have the potential to be severe, producing damaging wind gusts and hail to near 1" in diameter.
More widespread thunderstorms are expected to develop overnight as a disturbance approaches from the northwest. While some of these storms may be strong, producing wind gusts and small hail, they should gradually begin to weaken through the overnight hours. The main threats will gradually shift to a heavy rain threat with localized flash flooding possible.
Waco may reach 100 degrees for the first time this year today. Here are some interesting 100 degree day information for Waco. * The average first 100 degree day is July 4th. * The average last 100 degree day is August 29th. * The earliest occurrence of 100 degrees was March 28th, back in 1971. * The latest occurrence of 100 degrees was October 4th, back in 1983. * We average 24 days with highs of 100 degrees or higher.
Good news! Thanks to a summer cold front that will sweep through North and Central Texas later tonight, a break from the summer heat is expected the next couple of days. Temperatures will be below seasonal normals. Forecast high temperatures will stay mostly in the 80s Saturday through Tuesday, then, warming up to the 90s by the end of next week.
Scattered showers and storms are expected through the morning hours, shifting south by the afternoon. In the morning hours, heavy rain, gusty winds and small hail are possible. As these storms move south, gusty winds and locally heavy rain are the main threats. All showers and storms will be capable of heavy rainfall, which may lead to localized flooding on Saturday.

 
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Tornadoes Strike Navarro County
Wednesday, September 5, 2007

Based on eyewitness reports, survey information from emergency management officials, and radar data, it appears that two tornadoes developed in southern portions of Navarro County on the morning of Wednesday, September 5, 2007.

The first tornado developed at approximately 7:42 am. The first damage was observed 6.4 miles south-southeast of the community of Richland. The tornado moved northeast and caused minor tree damage to the west of Highway 14. This tornado will be rated an EF-0 on the Enhanced Fujita scale. Maximum winds were likely in the 70-80 mph range. The path length of the twister was 0.8 miles with an average path width of 40 yards.

Reflectivity image (left) and velocity image (right) of the tornadic storm southwest of Richland, near the Freestone County line, at 7:35 am. In the velocity image, red indicates motion away from the radar in Fort Worth, and green indicates motion toward the radar.

Reflectivity image (left) and velocity image (right) of the tornadic storm southwest of Richland, near the Freestone County line, at 7:35 am. In the velocity image, red indicates motion away from the radar in Fort Worth, and green indicates motion toward the radar.

Reflectivity image (left) and velocity image (right) of the tornadic storm southwest of Richland, near the Freestone County line, at 7:35 am. In the velocity image, red indicates motion away from the radar in Fort Worth, and green indicates motion toward the radar.

The second tornado formed at 7:47 am, roughly 2 miles east-southeast of the first tornado. The first damage was noted along County Road 2410, just north of the Freestone County line. This twister was more significant than the first. It uprooted trees and snapped trunks and large limbs as it moved northeast. The tornado destroyed a barn approximately 1 mile west of Interstate 45 and damaged two metal transmission line towers 1/2 mile west of the Interstate. The tornado dissipated shortly after crossing Interstate 45. Based on the transmission tower and tree damage, as well as damage surrounding these areas, the tornado will be rated a low EF-2 on the Enhanced Fujita Scale. Maximum winds were likely in the 110-120 mph range. The twister path length was 6.1 miles with an average path width of 80 yards. 

Reflectivity image (left) and velocity image (right) of the tornadic storm south of Richland, along I-45, at 7:51 am. In the velocity image, red indicates motion away from the radar in Fort Worth, and green indicates motion toward the radar. Reflectivity image (left) and velocity image (right) of the tornadic storm south of Richland, along I-45, at 7:51 am. In the velocity image, red indicates motion away from the radar in Fort Worth, and green indicates motion toward the radar.
Reflectivity image (left) and velocity image (right) of the tornadic storm south of Richland, along I-45, at 7:51 am. In the velocity image, red indicates motion away from the radar in Fort Worth, and green indicates motion toward the radar.

 

Damage to metal transmission line towers 1/2 mile west of Interstate 45: Tree damage near the Navarro/Freestone County Line:
Damage to metal transmission line towers 1/2 mile west of Interstate 45: Tree damage near the Navarro/Freestone County Line:

 

Structural Damage near Interstate 45:

Structural Damage near Interstate 45:

 

Red lines indicate tornado paths between the community of Richland and the Freestone County Line:

Red lines indicate tornado paths between the community of Richland and the Freestone County Line:

This event was a reminder to all of us in North Texas that tornadoes can, and do, occur any time of the day and any time of the year. These storms reinforce the need to have a severe weather plan in place and practice it frequently. Furthermore, now is the time to get your NOAA weather radio ready. Weather radios will alert you of hazardous weather...whenever it strikes!

For more details on the Enhanced Fujita Scale, visit www.spc.noaa.gov/efscale/

Special thanks to Eric Meyers, Navarro County Emergency Management Coordinator, for the aerial photos. All photos are copyright and courtesy of Navarro County Emergency Management.