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Weather

Roanoke, Virginia

Current conditions

Temp: 71°	Dew Point: 40°
Humidity: 32%	Wind: SSW 12 mph
Visibility: 10.0 miles	Pressure: 29.75 in. -
Sky: Partly Cloudy

Next 12 Hours

3 pm	6 pm	9 pm	12 pm	3 am
Partly Cloudy	Partly Cloudy	Chance of Rain	Chance of Rain	Chance of Rain
74°	76°	70°	65°	61°
Forecast data from the National Digital Forecast Database

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5-Day Forecast

Saturday

	Hi 76°
	Lo 56°

Partly Cloudy

Sunday

	Hi 72°
	Lo 52°

Chance of T-storms

Monday

	Hi 74°
	Lo 49°

Partly Cloudy

Tuesday

	Hi 68°
	Lo 58°

Chance of T-storms

Wednesday

	Hi 74°
	Lo 54°

Partly Cloudy

Local Radar

Local Satellite

Almanac

Average High: 76°

Average Low: 53°

Record high/year: 92° (1977)

Record low/year: 35° (1967)

Sunrise: 6:09 AM

Sunset: 8:23 PM

Detailed History

Forecast for Roanoke

Updated: 12:17 PM EDT on May 17, 2008

	This Afternoon Sunny. Highs in the lower 70s. West winds 15 to 20 mph with gusts up to 30 mph.
	Tonight Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. West winds 10 to 15 mph with gusts up to 30 mph.
	Sunday Mostly cloudy. A chance of showers in the morning... then showers likely with a chance of thunderstorms in the afternoon. Highs around 70. West winds 10 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.
	Sunday Night Mostly cloudy with a chance of showers in the evening...then partly cloudy after midnight. Lows in the lower 50s. West winds 10 to 15 mph. Chance of rain 40 percent.
	Monday Mostly sunny. Highs around 70. West winds around 10 mph.
	Monday Night Partly cloudy in the evening...then becoming mostly cloudy. A 40 percent chance of showers. Lows in the upper 40s.
	Tuesday and Tuesday Night Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 60s. Lows in the upper 50s. Chance of rain 50 percent.
	Wednesday Mostly cloudy in the morning...then becoming partly sunny. A chance of showers in the morning. Highs in the lower 70s. Chance of rain 40 percent.
	Wednesday Night and Thursday Partly cloudy. Lows in the lower 50s. Highs in the lower 70s.
	Thursday Night Partly cloudy in the evening...then becoming mostly cloudy. Lows in the mid 50s.
	Friday Mostly cloudy with a 40 percent chance of showers. Highs in the mid 70s.

Sun and Moon

Sunrise:	06:09 AM (EDT)	Moon Rise:	06:30 PM (EDT)
Sunset:	08:23 PM (EDT)	Moon Set:	04:24 AM (EDT)


Moon Phase

Today	May. 19	May. 27	Jun. 03	Jun. 10

Air Pollution

Air Pollution Forecast for Roanoke
Current	Air Quality: Good	Pollutant: OZONE
Current	Air Quality: Good	Pollutant: PM2.5

Sat	Air Quality: Good	Pollutant: OZONE
Sat	Air Quality: Good	Pollutant: PM2.5
Sun	Air Quality: Good	Pollutant: OZONE
Sun	Air Quality: Good	Pollutant: PM2.5
Mon	Air Quality: Good	Pollutant: OZONE
Mon	Air Quality: Good	Pollutant: PM2.5

NWS Forecaster Discussion

325 fxus61 krnk 171747 afdrnk Area forecast discussion National Weather Service Blacksburg Virginia 147 PM EDT Sat may 17 2008 Synopsis... high pressure is centered along the Gulf Coast. An upper level trough of low pressure extended from eastern Canada into the Ohio Valley. The upper trough will be responsible for cooler than normal temperatures over the eastern Continental U.S. Into early next week. && Near term /until 6 PM this evening/... have slowed down arrival of clouds until later this afternoon. Even with a lot of sunshine and a westerly component to the wind... it will be hard to warm up another 15 degrees by 3-4pm so have trimmed maximum temperatures by a category. && Short term /6 PM this evening through Sunday night/... the upper trough will be the weather focus the next couple of days. Energy passing through the upper trough will result in series of surface fronts to move across Great Lakes...through the Ohio Valley...and across the middle Atlantic region. For today...weak surface trough is forecast to move southeast through Ohio Valley reaching our northern counties toward sunset. Second...much stronger front will cross the area Sunday. For tonight...trough washes out with precipitation waning quickly after sunset. A second much stronger front will move across the Ohio Valley late tonight and cross the area Sunday. Isentropic lift ahead of this second front may result in scattered late night showers...but greater coverage of precipitation will hold off until the day Sunday. Went pretty high on probability of precipitation Sunday per guidance and forecast for better dynamic lift along the frontal zone. Front is prognosticated to enter the County Warning Area Sunday morning...crw/jkl at 12z...roa/tnb 18 UTC...east of Dan by 00 UTC. In the wake of the front...northwest downslope flow will result in drying and demise of shower activity. && Long term /Monday through Friday/... upper vortex remains nearly stationary over eastern Canada for the first part of the week. Yet another front will cross the area Tuesday. Sensible result should be dry weather Monday...followed by wet weather with the front Tuesday...then dry again Wednesday behind the front. Temperatures for M-west will be cooler than normal per flow originating from Canada. Not sure if folks in the east have been taking notice...but there is an impressive ridge of high pressure over the western Continental U.S.. Medford Oregon hit 102 degree f Friday may 16. This upper level ridge is forecast to move east during the week...bringing the heat to the central Continental U.S. By middle week. Here in the east...the upper level trough will get squeezed...leaving an Omega block pattern over the lower 48. This general pattern forecast to persist into next weekend with very slow eastward progress to the ridge as western energy tries to erode the central U.S. Ridge. GFS is more progressive moving the eastern US trough and building heights by next weekend over the eastern Seaboard. Canadian model is holding onto the eastern Canada upper trough longer than the GFS and not allowing as fast height rises. HPC concluded that Canadian and 12z GFS ensembles with the trough holding somewhat longer was the preferred solution. The result for our County Warning Area is a fairly cool period with temperatures well below climatology in the first half of the week and climbing make toward climatology by late week...depending again on how the upper levels progress. With fairly low probability of precipitation except in passing shortwaves...the timing of which becomes fairly problematic by late next week. && Aviation /18z Saturday through Thursday/... VFR conditions are expected at all tafs sites through early Sunday morning. As mixing continues today 20-25 knot winds shown just above the inversion on this mornings rnk and gso soundings will reach the surface. Winds will be gusty through the afternoon even if observations occasionally do not report any gusts. A weak short wave pushing a trough through the eastern Great Lakes will bring clouds into the northwest County Warning Area. There is a small chance of showers at blf and lwb between 01-05 UTC...not a high enough chance to include in the taf...even expect ceilings to stay VFR. A stronger front crosses the forecast area on Sunday. Winds will increase to 40-50 knots just above the inversion tonight so low level wind shear was added to the forecast. A band of showers just ahead of the front will reach blf and lwb around 12z. Enough lift and low level moisture with the front for MVFR conditions with the showers. Expect best chance of rain and MVFR ceilings/visibilities to hold off at lyh and Dan until after 18z. Active weather pattern continues through Monday with a series of short waves rotating around the large upper low in southeast Canada. MVFR conditions are likely with each wave...due to ceilings and/or showers. Periods of IFR conditions are also possible in southeast WV...especially blf. VFR conditions are expected in between each wave. && Rnk watches/warnings/advisories... Virginia...none. NC...none. WV...none. && $$ Synopsis...PM near term...air mass short term...PM long term...pc/PM aviation...air mass

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Local Storm Report

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