Weblog / Tag: severe weather

Posts tagged with severe weather throughout the weblog.

Amazing readings from the mesonet station in El Reno, OK

Posted at 8:18 pm / tagged: , , / Comments Off
Oklahoma Mesonet readings over the last 24 hours. Can you spot the tornado impact?

Oklahoma Mesonet readings over the last 24 hours. Can you spot the tornado impact?

Get a load of this meteogram from the Oklahoma Mesonet in El Reno, OK, tweeted by Base Velocity, LLC. Not only did it measure a 150 MPH wind gust around 4:30 PM, it also recorded a pressure drop to 940 millibars and a complete loss of solar radiation around that time — suggesting it was pitch black outside at the time of the tornado. I’ve seen early reports on Twitter suggesting pretty serious damage there. Here is a Doppler base velocity image from around the time of the tornado strike. Extremely strong couplet in play. I hope people heeded warnings and protected themselves from what appears to be an extremely violent tornado.

First solid severe event of the spring in the books

3D view of a severe thunderstorm over Beaufort, SC on March 27, 2011. Image generated by GR2Analyst.

3D view of a severe thunderstorm over Beaufort, SC on March 27, 2011. Image generated by GR2Analyst.

The first severe weather event of the spring is in the books for the Lowcountry. Hail was the primary factor, with numerous reports of large hail, with a report of baseball-size hail near Rincon, GA and tennis ball-size hail in Port Royal, SC (just south of Beaufort; check out TheDigitel Beaufort for pictures). There were a few isolated wind damage reports, but hail was definitely the story. One tool I like to use to examine the aftermath of a storm event is the IEM Cow, an unofficial tool developed by the Iowa Environmental Mesonet that groups issued warnings with storm reports (if there were any for that particular warning). Here’s what the Cow says about today’s event.

The hail core that dropped the baseball-size hail continued out of Rincon and basically followed U.S. 278 for a time, dropping golf ball-size hail on Hardeeville and Bluffton before weakening as it traversed the north end of Hilton Head and went offshore. Fortunately for our cars, the core of the storm stayed to our north (I live mid-island); we got a brief dose of heavy rain and a very chilly downdraft but not terribly much more than that.

IEM chat rooms I’m monitoring today

Posted at 12:43 pm

I’ll be watching three weather chats today: WFO Charleston, SC, WFO Columbia, SC, and WFO Greenville-Spartanburg, SC as a threat for severe weather unfolds later today and into tonight. A reminder: These are not official NWS chat rooms — there won’t be any forecasters in there, but iembot will be there to relay watches, warnings, and other products from the various forecast offices as they are issued.

Some November weather excitement

Posted at 10:12 pm

Tomorrow night could be meteorologically exciting. Mac users in Charleston, have you set up your Adium weather alerts yet? :)

Pure Luck

Posted at 12:48 am / tagged: , , , , , / Comments Off
Base reflectivity image of severe thunderstorm over Hilton Head Island

Base reflectivity image of a severe thunderstorm over Hilton Head Island on July 10, 2010.

This severe thunderstorm, referred to as extremely dangerous by the Charleston National Weather Service, was about as intense as advertised, and was quite a scare for one driver, as this NWS storm report illustrates (emphasis added):

CHS: 1 W Hilton Head Island [Beaufort Co, SC] law enforcement reports TSTM WND DMG at 05:34 PM EDT — large oak tree fell on car at intersection of jenkins island road and hwy 278. driver uninjured.

Yeesh. Glad the driver’s OK. Here’s a roundup of today’s storm reports — was a windy one out there on Tybee Island.

A doozy of a weather day ahead

Posted at 12:28 am

In advance of a doozy of a weather day, I’ve spent a portion of my evening revamping the Charleston Weather blog. I’ve installed the latest P2, Automattic’s excellent real-time WordPress theme, and I’ve also (with any luck) enabled PubSubHubbub for posts to the blog. Weather information is exactly what the real-time web is designed for, I think — tomorrow may be a great test of that. So, especially if you’re in Charleston, follow the blog tomorrow along with the alerts we’ll have on Twitter, Identi.ca, and Facebook. Hopefully things will turn out better than the strongly-worded alerts have been telling the story, but it’s tough to say.

Recapping last night’s severe weather

Posted at 2:11 am

I’ve done up a quick recap of last night’s severe weather over on the Charleston Weather blog. The storm report map was sourced from the Iowa Environmental Mesonet website. They’re very progressive (geotagged storm reports using the Google Maps API, a Jabber room that relays products directly from LDM, etc.) and ridiculously useful in a pinch. I like ‘em a lot, and might need them again tomorrow.

Hunker Down!

Posted at 2:56 pm / tagged: , , , / Comments Off

Severe weather season roars back to Charleston today. I’m in “hunker down” mode here, monitoring all sorts of varying weather information. Here’s how to keep up:

  • On Twitter, I’ll live-tweet the storm event at @chswx. If you just want warnings and forecasts, I recommend @CharlestonWX. Also see @weatherwatches for advance notice of potential watches. Don’t forget local media, as well, including Rob Fowler, Josh Marthers, Joey Sovine, and the Live 5 Weather Team.
  • I’m uploading radar images periodically to radar.charlestonwx.com. There’s an animation script which gives you 10 frames and many Level III products to play with.
  • If time permits, I’ll do some writing with more detailed analysis at my new weather blog. Given the fast pace of these storms, blogging may be somewhat prohibitive. (It’s much easier to blog a hurricane than it is a springtime weather event.)

Despite all this technology we now have, your best defense is to have a NOAA Weather Radio and make sure to heed all warnings that come down from the National Weather Service or other emergency management officials. Remember, the Internet is a great tool, but is not intended for life-or-death decisions. Stay safe out there!

Experience The Warmth

Posted at 12:56 pm / tagged: , , , / 10 comments »

We in Charleston have reverted back to October, apparently. If you’ve stepped outside, you’ve undoubtedly noticed the return of warm, mid-70s temperatures, Charlestonian humidity and a familiar urge to dodge mosquitoes. Funk-nasty. This is happening thanks to a system pumping a very warm southerly flow into the area.

Well, this sort of thing doesn’t last too long in December, and typically, these temperature differences resolve themselves with force. A fairly potent storm system is sweeping through the middle of the country, causing plenty of problems with severe weather across Texas and into Mississippi and Alabama. So, as you might expect, we’ve got a slight risk of severe weather tomorrow, which primarily hinges on how much sunshine peeks through before the front arrives. In fact, the outer portions of the storm are showing up on radar.

So, keep an eye out during the day tomorrow — it could get a little rough at times. It’ll be through by Friday, and we’ll get back into upper 50s for highs (though the lows aren’t currently projected to be as low as they have been, which is good for my getting up on time). One thing is for certain, this late fall has been anything but normal; we just can’t seem to figure that out this time around.

Rains have pulled away — now, for the aftermath

Posted at 1:04 am / tagged: , , , , / Comments Off

Who knows what kind of soggy mess we’re going to see when day breaks tomorrow — I can imagine it’s going to be pretty bad for folks at Northwoods Mall and in the Shadowmoss subdivision. My buddy Tom called and said he had to try three different ways to get in before he could actually access his house near the golf course. He said he saw a river running through the cartway.

Well, rivers generally begin running after ridiculous storm totals like these, which just came over the wire from the National Weather Service.

Public Information Statement
Statement as of 12:48 PM EDT on October 25, 2008

The following are unofficial storm total rainfall amounts for the
last 24 hours ending at midnight EDT Saturday.

…South Carolina…
Beaufort 2 N 4.54
Beaufort mcas 3.67
Bennetts Point 4.11
Charleston Airport 6.57
downtown Charleston 5.23
Dorchester 4.96
Goose Creek 4 se 6.74
Hardeeville 7 S 3.62
Hardeeville 13 S 4.17
Huger 3 NNE 6.58
McClellanville 6.41

short stay 3.13
west Ashley 5.62
Witherbee 6.10

Here’s hoping that in the end people are minimally impacted, but tomorrow morning will provide the grim details of the aftermath of today’s record rainfall.

Midday update: The Digitel says Ashley Ave. downtown is still underwater this morning. Having lived there for several years, I’m not surprised in the slightest.