Monday, the combination of low winds and high temperature will possibly create ozone levels in the air that are unhealthy for sensitive groups. It is an ozone action day. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors. You can help out by doing your best to reduce pollution today. You can find some tips here.
After stalling along the coast today for a few hours, Tropical Storm Bill is making steady northward progress this evening. The bands of intense tropical rainfall of 2 to 4 inches per hour will begin to spread into the region from the south later tonight and into Wednesday. The central Texas area will start seeing this heavy rainfall after midnight and it may last through Wednesday morning. The north Texas area, including the DFW Metroplex will see this heavy rainfall spread into the area during the morning hours, and it may last into Wednesday evening.
Here is the forecast path:
The remains of T.S. Bill will continue to lift northward into portions of north/central TX on Wednesday. With the widespread moisture, heavy rain additional river flooding and flash flooding is expected...especially along and east of the I-35 corridor. In addition--there will be a threat for a few very brief tornadoes. While brief...these tornadoes will still be capable of very fine corridors of damage. Make sure that you have multiple ways to receive warning information.
Information is from the National Weather Service and the National Hurricane Prediction Center.
Here's an update from the National Weather Service:
One more soggy day today, but a major weather pattern change is in the forecast. A cold front will move through tonight and bring much drier air into the region behind it which will result in an end to the relentless rains. An upper level high will build into the region Monday and keep the chance of rain low through the next week.
The region along and west of I-35/I-35E is starting the process of drying out. Scattered showers and thunderstorms southeast of a Sulphur Springs to Rockwall line will continue to move southeast through this evening...exiting the region before midnight.
Texas Storm Chasers puts the risk of thunderstorms tonight around 1 a.m. to 2 a.m., with 1-2 inches of rain, and possible large hail and damaging wind.
National Weather Service Update: "Widespread rainfall is expected again overnight tonight across North and Central Texas. There will be two different sources for these showers and storms. The first will be from a complex of storms that will move into the western portions of North and Central Texas tonight and come through the area fairly quickly. Some of these storms may be strong, but severe weather is not expected. The second area of concern will be for areas along and north of the I-20 corridor where storms are expected to repeatedly develop and "train" over the same general area for several hours. Heavy rain and flooding is again expected tonight for this area."
Update - 11:02 a.m.: A Tornado Watch has been issued for 35 counties in North Central Texas, including Denton County until 6 p.m. today. This means that conditions are favorable for the possible development of tornadoes. If you are going to be outdoors today, have plans at all times to get to shelter quickly if needed. Make sure that you have a means of staying informed of the situation with the weather. Stay tuned.
Original Post: Today will bring yet another round of thunderstorms and unwelcome rains to add to our flood situation in North Texas.
According to the National Weather Service, storms should enter our area after 1 p.m. Large hail, damaging winds, and even tornadoes are possible. There is already a tornado warning at this hour for an area just west of Abilene, where a line of storms is building up and heading our way.
Denton County is at high risk for floods due to saturated soil, swollen creeks and rivers, and full lakes. We are under a flash flood watch. In recent days, there have been numerous reports of cars getting washed away after attempting to drive through water. There was even a rescue in Lewisville on Saturday night.
Update - 8:17 p.m.: We've had some technical difficulties attaching images to the map we posted. For photos, please see our Facebook Album.
Previous update: Here's a Google Map we made of this morning's damage:
You can click the markers for more detail. I'll be adding photos to these markers as I can.
Update - 2:45 p.m. There is a tornado warning for northeastern Denton County right now.
We spent the last couple hours walking around Old Town and taking a look at the damage. We'll have a writeup and more photos in just a bit. It's going to take some time.
Lewisville Lake continues to rise, and is now at 525.87 feet. It has risen over a foot today.
Update - 12:08 p.m.: The National Weather Service just issued another severe thunderstorm warning for the northwestern part of Denton County, which does not include Lewisville. I pass it along, because this is nearby, and over our watershed.
Update - 11:53 a.m.: Mill Street Diner is damaged, and the power is out there. Blurry photos posted on Facebook showed a hole in the building that would appear to be from an impact. We'll try to get a better photo in a bit. In the mean time, these folks are going to lose their food if we can't find them a gas-powered generator. If you own one, and would be willing to lend it, please contact me: firstname.lastname@example.org, and I'll put you in touch.
Update - 11:33 a.m.: Here is the National Weather Service radar-based rainfall estimate from Friday afternoon until almost 11 a.m. today. As you can see, rainfall amounts in Denton County range from 1 - 5 inches. Lewisville is in the 1 - 3 inch range. The National Weather Service has issued numerous flood warnings, which seem to come with increasing frequency. We should just say that if you are driving near creeks and streams, use caution, and please do not try to cross running water. If you live in a low-lying area, be prepared to move if waters rise. Stay tuned...
Update - 11:25 a.m.: As of 10:20, Lewisville Lake had climbed up to 525.5 feet, which is 3.5 feet into its 10 foot flood pool. This level is HIGHER than before they started releasing massing amounts of water last weekend. At the moment, the Corps of Engineers reports that Lewisville dam is releasing 3,803 cubic feet per second. The Elm Fork Trinity River near SH 121 is running about 3,970 CFS.
Update - 10:50 a.m.: The storms continue. Most Counties in North Texas are part of a tornado watch that is set to last until 9 p.m. tonight.
Krause's Auto Shop appears to have partially collapsed, and Metric Motors Automotive, is missing its roof, and has also apparently partially collapsed.
Here are photos by Russ Sims:
Update - 10:15 a.m.: The Lewisville Office of Emergency Management tweeted two photos of an auto repair shop damaged in Old Town. (Photos via Lewisville Office of Emergency Management)
Update - 10:05 a.m.: TNMP says there are about 320 customers in Lewisville without power that they know of.
Update - 10:00 a.m.: TNMP followed up to say that some restoration crews are currently working on fixing the outage. "Please keep in mind that lineman safety will come first and, if conditions dictate, we’ll delay restoration efforts to keep them safe," he said. "However, once it’s safe, they’ll be on it." He also noted that since lightning and wind were still around, there is a possibility for more outages.
Update - 9:50 a.m.: We just spoke with a representative from Texas New Mexico Power, who said they are now currently aware of 16 outages in Lewisville, the largest of which affects 88 customers. He said that many of the outages affect only one or two homes. At the moment, there is no restoration time estimated, because crews are waiting for the lightning to stop. Once it becomes safe to work on restoration, crews will begin restoring power, prioritizing the outages that affect the largest number of customers. Again, do not assume that TNMP knows about your specific outage. Call TNMP at 1-888-866-7456 to report your outage.
Update - 9:30 a.m.: Lt. Butterworth with the Lewisville Police Department confirmed that PD still has not had any reports of injuries. He said that most of the structural damage reported so far was east of Mill street. He said there were some downed power poles and lines, and that a car lot down that way had an awning blown off. We did have a reader near Central Elementary School report that they had a power loss, but police and TNMP seem not to be aware of any power outages. If you have lost power, please do not assume that someone else has called it in. Call TNMP at 1-888-866-7456 to report your outage.
Update - 9:00 a.m.: Lewisville first responders are busy assessing a swath of damage that seems to have stretched from the area of the Braums at Fox and I-35, down through the neighborhoods around Central Elementary, near Mill Street Cafe, the McKenzie Hembry Neighborhood, and Purnell street, down through Railroad St.
Fire Chief Tim Tittle says there are not any injuries yet reported with this storm. Tittle said at this time it is unknown whether the damage was from straight-line winds, or tornadic activity. Numerous trees could be seen down and blocking roadways. TNMP and Atmos were out assisting with electric and gas utilities.
Mill street was closed between High School, and a few blocks south of there as emergency crews worked around downed power lines. It appeared that the roofs of some buildings in the area right around Mill Street Cafe had peeled off and at least one section wrapped around a power line and pulled it down.
A tree was in the middle of Purnell Street by the bus barn.
This flagpole at Renaissance Village was knocked over.
Original Post: This morning at 6:41 a.m., the National Weather Service issued a tornado warning until 7:15 a.m., based on radar-indicated rotation seen near Grapevine.
At our house, I woke up to loud bangs, and what sounded like something hitting the side of our house. Seconds later, the phone rang with a tornado warning message from City of Lewisville Emergency Management. Storm sirens sounded, and we set about waking up the kids to get them ready to take shelter.
Although the tornado warning has been cancelled now, we are still under a severe thunderstorm warning until 7:45 a.m.
At this time, we have not yet heard any damage reports. We'll be checking in, and would like to hear from you if you had any damage in your part of town.
Update: 5/8/2015, 2:05 p.m.: The National Weather Service has issued an areal flood warning for Denton and Collin Counties. Law enforcement personnel have reported that numerous roads across the county are still closed due to floodwaters from rains that occurred Thursday night.
Excessive runoff from heavy rainfall will continue to cause flooding of small creeks and streams, as well as farm and country roads. Do not attempt to travel across a flooded road. Turn around, don't drown!
Friday, 5/8/2015, 1:15 p.m.: The National Weather Service has issued a Tornado Watch for Denton County effective until 9 p.m. This means that conditions are favorable for severe weather that could include tornadoes. If you are going to be outside this afternoon or this evening, make sure that you have a way to obtain weather information, and that you have plans for a safe place to go in case the weather turns bad. If you are going to the Keeping Tradition Alive Pipes and Drums jam at Lewisville City Hall, city staff have already announced that City Hall will be available for shelter if the need arises.
Here is the National Weather Service statement about severe weather tonight: "More severe weather is expected today across North Texas. Scattered showers and thunderstorms may develop as early as late this morning with more robust thunderstorm development later this afternoon and evening. The greatest threat for severe weather is from Comanche to DFW to Gainesville late this afternoon and evening. Severe thunderstorms will be capable of producing large hail...damaging winds and tornadoes. Flash flooding will also be possible through this evening across all of North Texas."
Today in Lewisville, we have a 40% chance of showers or thunderstorms, mainly after 3 p.m. The high should reach about 78. Tonight, rain chances increase to about 60%, with some storms possibly severe.
Via the National Weather Service in Fort Worth:
Scattered to numerous strong to severe thunderstorms are expected to develop across central texas during the mid to late afternoon hours. Additional strong to severe storms will develop this evening north of Interstate 20. Before moving southeast across those areas primarily east of Interstate 35 and North of I-20 during the overnight hours.
Severe weather hazards will include very large hail, damaging winds, and frequent lightning. A few tornadoes are possible, especially with thunderstorms that remain discrete. Heavy rain and damaging winds will become the main threat overnight. As a severe storm complex moves southeast across areas mainly east of interstate 35 and north of Interstate 20. A localized Flash Flood thread may occur across these areas as well during the overnight hours.
Here is the video outlook for Wednesday - Friday (produced Tuesday afternoon):
Stay tuned to local media throughout the day for updates as the situation develops. We will provide updates here and via our Facebook page or Twitter as we get them.
Update: 9:20 a.m.: The National Weather Service has upgraded the flood advisory to a warning for Denton County. Avoid low-lying areas.
Original Post: FLOOD ADVISORY FOR DENTON COUNTY - The National Weather Service has issued a flood advisory for Denton County. As of 8:32 a.m. doppler radar indicated heavy rain due to thunderstorms, with one to two inches of rainfall expected over the next few hours. NWS thinks this could cause minor flooding in the advisory area, especially on roadways and in poor-drainage areas. Please use caution, and remember: Turn around, don't drown! Don't drive through moving water across roadways, as it only takes a small depth to sweep a car away.