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Soaking Rains


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Area forecast discussion

National Weather Service Blacksburg Virginia

955 am EDT Sat may 12 2012

Will be looking at a wet start to the upcoming week as a slow moving

storm system pushes across the eastern United States. Shower

activity will make its way into the mountains on Sunday morning as a

deep low pressure system lifts north through central Tennessee and

Kentucky...riding along a slow moving cold front stretching from

northern New England through the Gulf Coast. Shower activity will

spread east through the afternoon...with a few showers developing

into thunderstorms by early evening. Will have to keep an eye out

for the possibility of flash flooding on Sunday night...mainly

across the mountains. Weather forecast models are in decent

agreement of one disturbance possibly bringing heavy rain to

southeast West Virginia and the mountain Empire Sunday evening...

while a stronger disturbance will enter the North Carolina mountains

and bring heavy rain west of the Blue Ridge by sunrise Monday

morning.

Periods of heavy rain will continue on Monday as the cold front

moves slowly east across our area. With east to southeasterly winds

expected ahead of the cold front...will be concerned with strong

upslope flow along the Blue Ridge...which will likely result in

locally high rainfall amounts in the 2 to 4 inch range across parts

of the foothills.

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It's looking more and more like the escarpment in Western North Carolina could receive some healthy rainfall totals from Sunday night to Monday evening. Places like Lake Toxaway in Transylvania County wouldn't be a shock at all from some 4-6 inch totals. And along a line from Lake Lure to Linville Falls, easily 3 or more inches possible in spots.

Models have been very persistent in a meso-low type feature over Upstate SC that would really focus the rains along the Southeast slopes in North Carolina.

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Special Statement SPE.gif

Statement as of 9:26 PM EDT on May 12, 2012

... Heavy rainfall expected late Sunday through Monday...

A slow moving upper-level trough of low pressure will track from

the mid-south overnight across the southeast Sunday and into the

mid-Atlantic region by Monday. Abundant Gulf moisture will be

drawn northward into our region late Sunday through Monday as this

occurs. Light rain will begin to spread into southwest

Virginia... northwest North Carolina... and southwest Virginia late

tonight or early Sunday... then steadily progress northeastward

during the day. Intensity of the rainfall will also increase as

the day progresses... with moderate to heavy rainfall overspreading

the area by evening and overnight Sunday into Monday morning.

Rainfall in excess of 2.0 inches is expected across northwest

North Carolina... with 1.0 to 2.0 inches of rainfall elsewhere.

The ground across the region is saturated from recent heavy

rainfall and prolonged cool weather. During the mid-part of this

past week... flash flooding was observed in the northwest North

Carolina counties of Surry and Stokes from persistent

thunderstorms. These areas will simply not be able to absorb much

additional heavy rainfall without flooding and/or flash flooding

occurring. Rainfall of just two inches in one hour or less than

three inches in three hours will be sufficient to produce flash

flooding in Surry and neighboring counties. Locally... it may even

take less rainfall to result in flash flooding. Slightly more

rainfall will be needed to produce flash flooding elsewhere where

less rainfall has fallen recently.

Rainfall through early Monday should generally be in the form of a

continuous light to moderate rainfall. However... Monday afternoon

as the area moves into the back side of this weather system and

receives more heating and hence instability... thunderstorms with

localized heavy rain may develop. This could result in more

serious flash flood issues should this occur.

Forecasters will be monitoring the situation closely and a Flash

Flood Watch may be required for parts of the forecast

area... particularly northwest North Carolina for late Sunday

through early Tuesday. A Flash Flood Watch may be issued for

parts or all of the forecast area during this time

frame... especially northwest North Carolina.

Monitor NOAA Weather Radio for the latest information... forecasts... and

warnings.

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Well they think we are going to get dumped on. Here is a statement that has came out.

A COLD FRONT WILL MOVE INTO THE AREA FROM THE WEST SUNDAY NIGHT

INTO MONDAY. STRONG SOUTHERLY FLOW WILL BRING DEEP MOISTURE INTO

THE AREA AND SHOWERS WITH THUNDERSTORMS ARE EXPECTED...CREATING

THE POTENTIAL FOR HEAVY RAINFALL. UNCERTAINTY REMAINS ON THE

AMOUNT AND LOCATION OF THE HEAVIEST RAINFALL...BUT TOTALS OF 3 TO

4 INCHES ARE POSSIBLE ALONG AND NEAR THE BLUE RIDGE. 1 TO 3 INCHES

OF RAINFALL ARE POSSIBLE IN AREAS ALONG AND NORTH OF INTERSTATE

85. LOCALIZED FLOODING MAY DEVELOP...ESPECIALLY THOSE LOCATIONS

WHERE THUNDERSTORMS REPEATEDLY TRACK OVER THE SAME AREA.

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I'm not feeling it here in Marietta. I think we will get a good dousing but not as much as what some are calling for.

I'm pretty confident we are in for a solid rainfall over the next couple of days.

I'll take a stab at a total and guess 1.67" by Monday night.

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Alabama is getting soaked nicely tonight. Heading for Ga (unless there is some robbery from the line of convection to the FL panhandle). So far it hasn't interrupted too badly. If it holds together, Atlanta could get a solid 1" to 2" from this batch alone.

post-38-0-85153600-1336882755_thumb.jpg

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Alabama is getting soaked nicely tonight. Heading for Ga (unless there is some robbery from the line of convection to the FL panhandle). So far it hasn't interrupted too badly. If it holds together, Atlanta could get a solid 1" to 2" from this batch alone.

:thumbsup: Lookin' good! Thanks for the update Robert!

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Alabama is getting soaked nicely tonight. Heading for Ga (unless there is some robbery from the line of convection to the FL panhandle). So far it hasn't interrupted too badly. If it holds together, Atlanta could get a solid 1" to 2" from this batch alone.

I got .15 this morning, before noon, then it started again 8ish, this evening, and has been steady all night. T

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Flash Flood Watch WAT.gif

Statement as of 4:14 AM EDT on May 13, 2012

... Flash Flood Watch in effect from this evening through Tuesday

evening...

The National Weather Service in Blacksburg has issued a

* Flash Flood Watch for portions of North Carolina and

Virginia... including the following areas... in North Carolina...

Alleghany NC... Ashe... Stokes... Surry... Watauga... Wilkes and

Yadkin. In Virginia... Carroll... Floyd... Franklin... Grayson...

Henry... Montgomery... Patrick... Pulaski... Roanoke... Smyth and

Wythe.

* From this evening through Tuesday evening

* 2 to 4 inches of rain are expected by late Tuesday with locally

high amounts possible along and just east of the Blue Ridge.

* Small streams and creeks may rise above bankfull with this

amount of rain.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead

to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action

should flash flood warnings be issued.

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the radar looks very spotty over the whole SE. There's not a real organized area of precip anywhere presently. Nothing here so far.

EDIT: And with that comment it immediatly begins to rain lightly.

I've had showers off and on all day with just enough time in between to get something down outside. These showers seem to be finding me, for a change...with another coming in before too long, radar says.

Good luck up there! T

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I've had showers off and on all day with just enough time in between to get something down outside. These showers seem to be finding me, for a change...with another coming in before too long, radar says.

Good luck up there! T

Finally!!!! We've been under a pretty steady light rain since about 2:00AM with only a few breaks here and there. This is the first normal steady rainfall we've had since early February I'd say. Everything should green up nice after this.

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nice light to spotty moderate rains here today, lately I can hear the heavier elements when they pass. This has been an interesting system so far, and it's still sort of 'murky' as to how the week will progress. The GFS looks like it keeps daily showers from Ga through Carolinas to Virginia most of the week, probably more diurnally driven as time goes on, the weakness aloft will be weak, but any peeks of sun could set off some rain or storms. Similar to what happened to Alabama today. As vorts moved overhead and worked on openings the instability was increased and some lines were able to organize a little, even some severe in several counties at different times. Good to see atleast numerous showers over a lot of the Southeast, but I'm a little doubtful of any real flooding even in the mountains, but a few flash flood warnings for a county here and there is probable (like in Tn and GA today). Hopefully we keep a weakness somewhere in our vicinity the bulk of this month (it would help make my May forecast verify atleast). Atleast there's no real signs of a major closed ridge aloft showing up yet, and the last few years we had those even in May. The tropics could get active but its too far out to speculate much.

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