Devistation In Moore Oklahoma...Severe Threat Here Tomorrow

Words sometimes cannot even describe what has occurred in Oklahoma this afternoon. Utter devastation ripped though many communities as a large scaled severe weather event unfolded. Rain, hail, and monster tornadoes scared many lives and neighborhoods, especially in Moore, OK. Before this event, the people of Moore are very familiar with severe weather as one of the worst storms to ever occur happened back on May 3, 1999. An F-5 Tornado with winds around 318mph, leveled homes, buildings, and ripped up roads. The only positive to come of the May 3, 1999 tornado were a blossom of storm shelters built all across Oklahoma.

Nonetheless, the images were powerful this afternoon.

Image: Moore Tornado May 20, 2013 from KWTV

 

Above is a snapshot of the tornado from this afternoon in Moore, OK. Storm spotters estimated the width of the tornado around 1 mile wide, with wind speeds equivalent to an EF-4 or EF-5. Following the abatement of the tornado, the aftermath images would just shake you.

 

Image: NBC News, the aftermath of the Moore, OK

 

Homes destroyed, gas leaks creating fires, and many people losing everything they had. As a meteorologist, we wish we could control the weather to steer these type of storms away, but all we can do is report and try to inform as many as possible.

 

An additional thought comes to mind in how this tornado parallels the path of the 1999 storm. The National Weather Service (NWS) in Norman, OK put together a graphic, displaying how close the paths were.

 

Image: NWS Norman, OK. Path of 2013 and 1999 Moore, OK Tornadoes

 

 

The 1999 storm was an F-5 tornado, but the rating on today's storm will wait until the NWS surveys the damage.

 

What we have to be concerned about tomorrow is that the severe weather will shift into the Brazos Valley. Up front, I can tell you that there is a small tornado threat here, but the atmospheric condition does not favor large, long tracking tornadoes. Furthermore, the highest chance for large tornadoes will likely occur from northeast Texas to Arkansas.

 

 

The Storm Prediction Center (SPC) in Norman, OK has placed the entire Brazos Valley under a "Slight Risk" for severe weather tomorrow, with parts of Leon County and points to the northeast under a "Moderate Risk."

 

Our set up for severe weather features a cold front to our north and west, along with a tropical flow of moisture from the Gulf of Mexico.

 

 

We see this all the time, but the true kicker to generating powerful storms lays in the upper levels. The jet stream along with other mid-level features create a strong enough wind to "tilt" individual thunderstorms. In other words, this upper level wind will allow storms to grow stronger and live longer. Therefore, strong winds, large hail, and even tornadoes become a concern when these type of conditions come together.

 

 

As the cold front moves closer and interacts with the daytime heating, clouds will begin to bubble up and severe weather will begin to break out.

 

Here is what we can expect here.

 

-Storms develop late in the afternoon Tuesday.

-Storms will continue into the night.

-Strongest storms will be to our northeast.

-Low threat of flash flooding.

-High threat of strong damaging wind.

-Moderate threat of large hail.

-Low threat of an isolated tornado.

 

Make sure to be weather aware tomorrow, and I will make sure to get as much information out to you on-air and online as well. Just make sure to get indoors if you see a storm approach, or you hear any thunder.

 

For more news and weather you can log onto: www.facebook.com/plushnickweather or www.facebook.com/KAGSTV. You can also check out our twitter feeds: @KAGSweather and @KAGSnews. Furthermore, you can download our new weather app. Search: KAGS Weather, in the Apple App Store or Google Play for Android.

Devastating North Texas Tornado Outbreak

From: The Texas Chaos Storm Team

Last evenings events were hard to think about and very tough to track. It wasn't the quantity of tornadoes that made this a news headline, but rather the quality of each individual thunderstorm. Many areas in north Texas, around the Dallas/Ft. Worth Metroplex were rattled by widespread severe thunderstorms. In particular, there were two towns that were hit the hardest: Granbury and Cleburn.

The original atmospheric set up did not call for such destruction. However, as the afternoon and evening wore on, the combination of an upper level low pressure system, low level heat & humidity, as well as a quick moving jet stream, came together to hash out this event. The key was the upper level low. While it was spinning over west Texas, the low was quite disorganized. However, during it's move to north Texas, the circulation became tighter and strengthening was the result. Along with the strengthening low, very cold air was associated in the upper levels, allowing for thunderstorms to grow higher, and in turn become severe with large hail, strong wind and generating tornadoes.

Some of the images were just stunning. Check out this picture of hail in Ganbury, TX that I found on facebook last night.

From spike to spike, the hail stone measures approximately 4" in diameter. That's equivalent to an average grapefruit. I cannot image something like this falling from the sky. What this illustrates is that the updraft (or upward motion) in the thunderstorm was so strong that it could support the weight and growth of this monster. The updraft speed must have been over 100mph to keep this suspended for a long period of time before crashing down to the ground.

Not only was the above picture incredible, but what meteorologists were able to view on Doppler Radar. Looking at the structure of the precipitation was a good indication that rotation was occuring in two different supercells just joust of the Metroplex last night.

 

If you took this image for what its worth, you would think that these were rotating supercells that look like prolific lightning, rain, and hail producers. But if you take a deeper look at the "Doppler" part of the radar, you will notice a tight circulation in the "velocity" image (illustrating speed and direction of the wind).

 

 

Here, you are looking at the southern cell that ripped though Granbury and Cleburn. This is a velocity image that helped to pinpoint the location of strongest rotation, or where the tornado was spinning. Green colors denote wind moving towards the radar site, while red shows wind moving away from the radar site. When you get these green and red colors tightly together, we call this a "couplet," indicating that there is a strong rotation in the storm with a possible tornado. Its these images on radar that support a Tornado Warning issued by the National Weather Service. Unfortunately, a radar cannot see what is happening on the ground, therefore, storm spotters, and law enforcement are extremely important in reporting whether there is a tornado or not. In this case, there was and for a time, this tornado was reported to be one-mile wide while in Granbury.

 

Overall, this was a very destructive event that unfolded last night and at this time the National Weather Service (NWS) in Ft. Worth is assessing each storm where a tornado was reported. Based on the damage in each area, the NWS will qualify whether a damage was from a tornado or not. If damage was from a tornado, it will be rated based on the Enhanced Fujita Scale (EF-Scale).

 

 

Because the wind was not directly measured during each storm, the rating is used as an estimation of how strong the winds were. From the survey, the NWS will say, "it will take this wind speed to cause this type of damage." Based on that estimated wind speed, an EF rating will be placed on that particular tornado.

 

From this morning and afternoon's survey, the NWS has rated a couple of tornadoes already. Each of the following assessments are for individual tornadoes.

 

Cleburn: EF-3 tornado with max winds of 140mph, and a width of 0.6 miles.

 

Granbury: EF-4 tornado ----preliminary

 

Cleburn: EF-0, minor damage with a max wind of 85mph.

 

For the other reports, you can click here to see the latest from the National Weather Service. As of this afternoon, there are preliminary 10 reports of tornadoes from last night. This number can change.

 

In closing, this was a horrific event with many reports of destroyed homes, injuries, and fatalities. When the weather looks like its going to take a turn for the worse, make sure to use your resources to stay in the loop. Your mobile devise, computer, tablet, and television are the best ways to know whats going on. Additionally, buying a NOAA Weather radio will instantly let you know if severe weather will threaten your location. Finally, your local television meteorologist will always give you the newest information so you and your family can make the safest decision.

 

For more news and weather you can log onto: www.facebook.com/plushnickweather or www.facebook.com/KAGSTV. You can also check out our twitter feeds: @KAGSweather and @KAGSnews. Furthermore, you can download our new weather app. Search: KAGS Weather, in the Apple App Store or Google Play for Android.