Archive for June, 2006

Wednesday Forecast

Wednesday, June 28th, 2006

Morning temperatures are quite comfortable in the upper 50s and early 60s as the sun rises (5:32 am today). Afternoon numbers will climb into the middle 80s with plenty of sunshine. Humidity stays bearable by late June standards with dewpoints in the lower 60s and a light breeze from the northwest. There’s a very small t’shower chance this afternoon, but any activity will likely be limited to the northern Cumberland Plateau. Warmer weather and small afternoon t’shower chances are expected Thursday and Friday. Heat ahead: the mercury climbs into the lower and middle 90s this weekend!

Highs for Wednesday June 28th.jpg

A New Orleans Update From Davis

Tuesday, June 27th, 2006

Before I start, if you have not seen The New Orleans Times Picayune’s interactive graphic of the timeline of the flooding, it’s pretty good: click here (if you are on wkrn.com, go to www.nashvillewx.com).

The hurricane season has been underway for nearly a month now, and The Army Corps of Engineers has been scurrying since last fall to temporarily fix the levee and floodwall system for this season. The plan for this year is to only bring the system back to “pre Katrina” levels. That might not sound good considering what happened, but for most of New Orleans (excluding eastern sections and Chalmette/St. Bernard Parish areas), the levees and floodwalls were never topped by the water. They were tall enough. The levees and floodwalls failed due to bad design.

If you have never read my essay, “Hurricane Katrina and New Orleans…What Went Wrong?” it will bring you up to speed on the levee and floodwall failures.

Microsoft Word version:
http://www.news2wkrn.com/weather/neworleans.doc

Streaming video version at http://www.wkrn.com/news/hurricane-katrina-new-orleans-what-went-wrong

If you have “dial up” or a slow connection try: http://www.news2wkrn.com/weather/archives/2006/03/hurricane_katrina_new_orleansw.html

Eelevation map smaller.JPG

So what is being done?

The biggest temporary fix is adding gates to the mouths of the drainage canals (17 St. Canal, London Avenue Canal, and Orleans Canal). These gates will be closed if a hurricane threatens, not allowing any storm surge from Lake Pontchartrain to enter them. The breaches in the 17 St. Canal and The London Avenue Canal filled the New Orleans “bowl” with water that made its way all the way downtown to the Superdome. The levees along the lakefront itself held just fine during Katrina.

But the problem is: How will the rainwater be pumped out if the drainage canals are gated off? Since the 1800’s pumping stations have been pumping the rainwater out of the city using these canals. These massive pumping stations are about 2 miles from the lakefront and the long term fix is to move them to the lakefront, building them into the lakefront levee system. But for this year (and probably next year), they remain where they are, meaning that if the gates are closed, the pumps can’t be used unless there are additional pumps at the gates. Well, they are installing pumps, but their pumping capacity will be less than 1/3 of the big pumps. That’s not good enough. New Orleans may be saved from a major storm surge from a breached levee, but homes could have rainwater flood them instead. If you have gutted your house, de molded it, and installed new dry wall, (like many have done) it could all be ruined again, even if it is only 6” of water in your house instead of 6 feet. My parents are thinking about waiting until October before hanging dry wall.

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Unfortunately, the situation is much worse for the eastern suburbs east of the Industrial Canal. This includes The 9th Ward, Chalmette, and St. Bernard Parish. Though many of the levees have been repaired, this area is much more vulnerable to an actual storm surge from The Gulf of Mexico to the east. Most people feel that until MRGO (The Mississippi River Gulf Outlet) is eliminated, it will continue to be a conduit to bring Gulf water directly into the eastern parts of the city and directly to The Industrial Canal. This caused flooding in 1965 with Hurricane Betsy, and again during Katrina.

This Time of The Year You Take A Day Like This When You Can Get It!

Tuesday, June 27th, 2006

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This time of the year, we could be in the mid 90’s with horrendous humidity (sound like last week?), so a high of 85 with dew points in the low 60’s is not so bad!

Our normal high is 87, so our forecast is for a few degrees below normal.

Like Lisa, I had all but given up on any t-storm chances yesterday evening after my long winded blog yesterday about that trough and short wave swinging southeastward. Then, lo and behold, those storms in Kentucky and Robertson Counties in Tennessee made their way (courtesy of an outflow boundary) into parts of Nashville and the north part of Middle Tennessee from about I-40 northward. Not all of Nashville received rain, but some got a good soaking. The airport only had .07″ but nearby Percy Priest had .52″ (indicative of what the Hermitage area received).

A Few Others:

Old Hickory: .25″
Clarksville: .04″
Port Royal .37″
Springfield: .75″
Portland: .26″
Lebanon: .06″
Sparta: .71″
Crossville: 1.99″ (behind stalled front)

Nice Weather When You Can Get It

Tuesday, June 27th, 2006

Weather Headlines

The high today (and tomorrow) is just around the climatological norm, around 86 degrees (”average” is 87). The dewpoints are expected to hover in the low 60’s, rather comfortable for late June (when the dew point gets to around 70 the air becomes noticable “sticky” with humidity). Partly cloudy skies this afternoon with a light breeze from the west… all in all, very nice summer weather. Best part is that its sticking around till we end the work week.

Highs Today

Radar Will “Wake Up” This Afternoon & Evening

Monday, June 26th, 2006

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Forecasting a summer afternoon’s t-storm activity “the morning of” is always an interesting endeavor. It’s less than twelve hours away, but can still be tricky. Maybe it is because we know there will be scattered t-storms, but we strive to come up with more details.

Well here goes.

I think that some storms this afternoon could be strong or severe with hail and short lived downburst winds. An upper level low is dropping southeastward through the north Mississippi Valley. It is also swinging an upper level disturbance (”short wave”) underneath it towards us for this evening. That is seen above in the “greenish” vorticity pattern that I’ve drawn the red dashed line through. As it moves in late this afternoon, storms should break out in the heat, starting in Arkansas, Missouri, and Illinois and begin spreading our way. The activity is likely to be scattered, so not every location will see a storm.

In addition, we still have a stationary front in East Tennessee. As this “short wave” moves across, it may also activate the storms ahead of and behind the front. That would affect our eastern counties.

It’s not going to be a widespread severe weather outbreak, but we could very well see some severe t-storm warnings issued late this afternoon and evening due to hail and brief thunderstorm downburst winds.

To read the Storm Prediction Center’s forecast for the area click below:
(more…)

Few Storms Around…again.

Monday, June 26th, 2006

Storm RIsk Today

This afternoon we’ll see some storms pop-up across our area, most of the activity will again be up on the plateau where we had some minor flooding Sunday. West and northwest of Nashville some of isolated storms could reach severe limits. Drier weather in store for us tomorrow lasting through Thursday. With a north wind today we’ll enjoy temperatures in the mid-80’s instead of the mid-90’s like last week. This more moderate weather looks to last through the balance of the work week.
Highs Today

Monday Forecast

Sunday, June 25th, 2006

Monday afternoon will feature warmth and some humidity. Highs will hit the middle 80s for the next several days. There’s a small thundershower chance from tonight through Monday afternoon (mainly Monday afternoon). A lingering stationary front is to our east…while an upper air disturbance (without much moisture) approaches from the northwest. Patchy fog is possible toward daybreak on Monday. For most of us, the dry weather from the weekend continues through much of the work week. No oppressive heat predicted in the near future, but we may get back toward 90 degrees by the end of next weekend.

Highs for Monday June 26th.jpg

3:39 pm Radar Update

Sunday, June 25th, 2006

At 3:39 pm thunderstorms dotted parts of eastern Middle Tennessee. Counties dealing with the slow-moving storms (and 1″ to 3″ rain totals) include: Monroe and Cumberland (in Kentucky), Clay (very soon), DeKalb, far southeastern Wilson, Cannon (very soon), Bedford (on Shelbyville right now) and Moore (soon). Expect lightning, heavy downpours and the threat of small hail under the heaviest storms.

The thunderstorms will be mainly limited to areas east of Nashville and the I-65 corridor today. A disturbance passing overhead from the northwest has prompted scattered t’showers in West Tennessee and western Kentucky. They are weakening as they approach us, but some of our western counties near the Tennessee River could see a stray t’shower later this afternoon. The very small t’shower chance in Nashville the rest of the afternoon/evening is due to that disturbance. Use the “NWS Radar Loop” at the top of the blog to see if storms are near you.

Funny Weather Video

Sunday, June 25th, 2006

ABC’s Jimmy Kimmel rules late night television.

Since that’s out of the way, I don’t feel bad linking to a hilarious video from NBC’s The Tonight Show with Jay Leno. I don’t watch much late night television (it’s a post-Craig Kilborn world, you know) but I heard about a segment featuring “Ross the Intern”. Ross heads to an Orlando television station during Tropical Storm Alberto and…the rest is pretty funny. Not very manly humor, but funny.

Sunday Forecast

Sunday, June 25th, 2006

Today’s forecast plays out a lot like yesterday’s: dry for many areas but there is a chance of thunderstorms (mainly east of I-65). Early morning temperatures are in the upper 60s and lower 70s. Fog is thick in some spots along the Cumberland Plateau; patchy fog is also a possibility in other areas this morning. Afternoon temperatures will hit the middle 80s. Despite a north breeze at 5 to 10 mph the humidity will linger. I can’t rule out an isolated thunderstorm for Nashville later today, but that chance should mainly remain east of Music City and the I-65 corridor where a stationary front is stretched across eastern sections of Tennessee. Slow-moving storms may bring heavy rain to some spots in that direction. A disturbance swinging in from the northwest later today may prompt a few spotty showers before the weekend wraps up. All in all: not a great threat of rain today for Nashville, but Storm Tracker should show a few thunderstorms as we get into the afternoon.

Highs for Sunday June 25th