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Archive for May, 2012

Tropical Storm Alberto stronger then first estimated

This is a supplemental update to the discussion posted earlier this afternoon. It looks like Alberto is a tad more organized then we first thought this afternoon. That doesn’t change the intensity or track forecasts as the system was likely this strong earlier. Here is the official update from the National Hurricane Center. Here is our afternoon discussion. 

TROPICAL STORM ALBERTO TROPICAL CYCLONE UPDATE
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL012012
650 PM EDT SAT MAY 19 2012

...SHIP INDICATES ALBERTO IS STRONGER...

REPORTS FROM A SHIP NEAR THE CENTER OF ALBERTO INDICATE THAT THE
CYCLONE IS STRONGER THAN PREVIOUSLY ESTIMATED.  BASED PRIMARILY ON
THE PRESSURE DATA...MAXIMUM SUSTAINED WINDS ARE NOW ESTIMATED TO BE
60 MPH...95 KM/H.  LITTLE CHANGE IN STRENGTH IS EXPECTED OVER THE
NEXT COUPLE OF DAYS AND NO CHANGES TO THE OFFICIAL FORECAST ARE
REQUIRED AT THIS TIME.

SUMMARY OF 650 PM...2250 UTC...INFORMATION
--------------------------------------------------
LOCATION...32.2N 77.9W
ABOUT 130 MI...210 KM ESE OF CHARLESTON SOUTH CAROLINA
ABOUT 120 MI...190 KM S OF CAPE FEAR NORTH CAROLINA
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...SW OR 220 DEGREES AT 3 MPH...6 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.38 INCHES

$$
FORECASTER BLAKE/FRANKLIN

Tropical Storm Alberto Develops off South Carolina Coast

[caption id="attachment_8375" align="aligncenter" width="580" caption="Visible Satellite Image at 3:30 PM EDT"]Visible Satellite Image at 3:30 PM EDT[/caption]

This sattilite image was taken at 3:30 PM EDT/2:30 PM CDT of what has now been designated as our first tropical storm of the 2012 Atlantic Hurricane Season. The National Hurricane Center has determined this system has developed a warm-core low pressure system and is organized enough to be designated a tropical system. The system is still disorganized for a tropical system as most of the convection is displaced to the northwest of the center of circulation. You can notice the center with the wind barbs. It is possible that the center will reform under the heaviest convection closer to the coast. This is fairly common with weak tropical systems.

This piece of text comes from an internal National Hurricane Center source that shows that we do indeed have Tropical Storm Alberto with 40 knot sustained winds and a minimum central pressure of 1007 millibars.

[caption id="attachment_8377" align="aligncenter" width="580" caption="TS Alberto: 18Z Model Tracks"][/caption]

Here are the latest tracks coming in from the weather models. Alberto is expected to slowly move south over the next day before eventually being picked up by a trough and pushed north. At this point, models suggest that the center of circulation will pass fairly close to the barrier islands of South Carolina and North Carolina and then move just east of the mid-Atlantic. Since this system is weak and disorganized, most of the convection will likely be displaced from the center, so in reality it won’t matter unless the storm becomes more organized with a tendency for convection to become more relegated to the center.

Atmospheric ingredients don’t favor rapid intensification and model guidance maintains Alberto as a weak Tropical Storm. We’ll bring you the National Hurricane Center advisories when they are issued.

Severe Weather Risk returns to NW TX/E. TX Panhandle

This graphic shows the new severe weather outlook issued by the Storm Prediction Center for May 19, 2012. This shows the probability of experiencing severe weather within 25 miles of any given point (such as your house) during the afternoon and evening hours of May 19. I’ll post the overall risks/locations in bullet style to make it easier to read.

  • Brown Shaded Zone: 5 percent chance of severe weather within 25 miles of your location (Low Severe Weather Risk)
  • Yellow Shaded Zone: 15 percent chance of severe weather within 25 miles of your location (Standard Severe Weather Risk)
  • Red Shaded Zone: 30 percent chance of severe weather within 25 miles of your location (Elevated Severe Weather Risk)
As you can see, a small portion of the eastern Texas Panhandle and Northwest Texas have been included in the standard severe weather risk for the afternoon and early evening hours. The elevated severe weather risk, where severe weather is most likely, is further north and east.
Severe Weather Risks in the eastern Texas Panhandle and Northwest Texas
The strongest thunderstorms may contain golfball size hail and destructive winds in excess of 70 MPH. The tornado threat will remain very low due to high cloud bases, but a brief tornado cannot be ruled out.

May 16 Website Updates

Good morning,

It’s been over a month now since I’ve filmed any tornadoes. There have been chases, there have been cool photography, but no major tornado events since April 14. There are indications that severe weather may return to portions of the Plains by the weekend and next week, but that’s just speculation at this point. I’ve been using this downtime to catch up on some other hobbies and finally have time to add several items to the Texas Storm Chasers website. I’ll go ahead and put them in bullet style.

* May 6 and May 11 photography posts added to the “Latest Chases” box on the homepage.

* Chase logs for February 28, March 18, and March 21 have been added and are available by accessing the Storm Chase Logs tab in the linkbar.

My next goal is to add my chase log for April 3. That may sound simple enough, but I’m going to spend extra time writing out every single detail of that chase. I’m going to try and do that today and I have no doubt it’s going to end up being a short novel. There are a few items I’m going to address in that (driving on highway shoulders in grid-locked traffic, the overall mindset of the day once it became apparent that was happening, and a secret I haven’t revealed about April 3.) The 28 second video we uploaded to our YouTube channel was from my new camera. What folks don’t know is that I had a HD camcorder running on the dash. I’ll reveal some of that video in the April 3 chase log as well. I’ve chased many setups over the years and up until April 3, the scariest day for me was my near death experience on April 24, 2010 out in Mississippi. That changed on April 3, not because of danger to my personal self, but the overall situation.

I’ll detail all of that in my April 3rd log.

~ David

5/11/2012 – Red Oak, Texas Sub-Severe Storm

image
1/2012Red Oak, Texas Sub-Severe Thunderstorm

This day wasn’t supposed to be a chase day, but when a severe thunderstorm developed unexpectedly about thirty minutes to his northwest, David Reimer couldn’t resist the opportunity to get some storm photography. By the time the storms reached David, they were well below severe limits, but still provided a photography opportunity just minutes from his house.

Read more ...

Photography by TSC

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Texas Storm Chasers and the Texas Weather Blog should not be your only weather source. For the official and latest weather forecasts and data, visit your local National Weather Service webpage at www.weather.gov.

In addition, we may not be able to post updates while storm chasing. Always check with other weather sources before making weather-related decisions.