Sunday, January19, 2020
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Marine Weather and Tides
Roanoke, VA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:29AMSunset 5:31PM Sunday January 19, 2020 4:44 AM EST (09:44 UTC) Moonrise 2:33AMMoonset 1:18PM Illumination 33% Phase: Waning Crescent; Moon at 24 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Roanoke, VA
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location: 37.28, -79.96     debug


Area Discussion for - Blacksburg, VA
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FXUS61 KRNK 190922 AFDRNK

Area Forecast Discussion National Weather Service Blacksburg VA 422 AM EST Sun Jan 19 2020

SYNOPSIS. A cold front extended from eastern New York State to the northern Gulf of Mexico this morning this front will move east today and will be off the coast tonight. High pressure will follow the front and will cover much of the eastern United States Monday through Thursday.

NEAR TERM /THROUGH TONIGHT/. As of 330 AM EST Sunday .

Long wave upper trough still developing over the eastern United States this morning with falling 500Mb heights and ripples of short wave energy. Plenty of westerly upslope component with a 40 to 50 knot low level jet to keep low clouds over the mountains throughout the day. Upslope somewhat weakens and winds turn more to the north overnight. Will still hold clouds, although just a shallow layer at that point, across the western slopes of Greenbrier County down to northwest North Carolina through morning.

Will be issuing a Wind Advisory along the southern Blue Ridge. Above 3500 feet mixing up to the 850-800MB depth with gusts peaking around 47 knots. Several short range models on Bufkit at Boone showed this potential. Pressure rises behind the front and cold air advection will also enhance winds today.

Cold air advection continues today and tonight. By 12Z 850Mb temperatures will be down near -16C along the west slopes of the central Appalachians. At the surface tonight the region will be between the cold front well off the East Coast and high pressure centered over the Northern and Central Plains. Sustained winds and gusts will gradually diminish tonight but still enough to produce wind chills around zero by the early morning. This wind chill values will be highlighted in the Hazardous Weather Outlook and later evaluation will determine need for any advisory.

SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/. As of 230 AM EST SUNDAY .

It is time to get out your winter gear as colder temperatures head our way. A large upper trough will develop over the eastern United States as several short-waves in the northern stream drop southward across the upper Plains through the Great Lakes. A 1040+ surface high pressure center located in the Midwest Monday morning builds southeast into the Ohio Valley by Tuesday with a decent shot of arctic air across the eastern CONUS. The high will move overhead Tuesday night into Wednesday.

Some of the coldest air of winter is expected with h85 temps bottoming out near -15C. Northwest flow and cold advection will create upslope clouds in the west Monday. High temperatures Monday will range from the lower 20s in the mountains to around 40 degrees in the piedmont. The New River valley will struggle to climb above freezing Monday afternoon. Low temperatures Monday night will vary from the single digits in the deeper mountain valleys to the upper teens in the piedmont. Wind chills cold be as cold as near zero in the northern mountains to teens in piedmont. Temperatures will moderate on Tuesday with high temperatures generally from the mid 20s in the mountains to the lower 40s in the piedmont. Under clear skies and light winds, low temperatures Tuesday night will drop to around 10 in the mountains to the teens in piedmont. Wind chill values could be as cold as single digits in the mountains to near 20 in the piedmont.

High confidence in the short term forecast.

LONG TERM /WEDNESDAY THROUGH SATURDAY/. As of 250 PM EST SATURDAY .

The encounter with chilly winter temperatures looks to be transient as sharply rising heights across the eastern CONUS follow in the wake of the the departing trough, which shifts off into the western Atlantic by mid-week. Cyclogenesis will occur well off the southeast coast Wed-Thu keeping any sensible weather well east and temperatures moderating in the Wed-Fri period with h85 temps pushing +5C. A southern stream dominated system begins to develop over the southern Plains by early Friday and lifts northeast toward the CWA by the start of next weekend. All available global model solutions and synoptic pattern continue to suggest an all-liquid event with deep-layer southwest flow maintaining mild air across the eastern CONUS once again. QPF looks to be moderate as the system is generally progressive on Saturday but with the potential for an inch or so of rain at the upper end.

AVIATION /10Z SUNDAY THROUGH THURSDAY/. As of 1250 AM EST Sunday .

A cold front extended from central Pennsylvania to eastern Tennessee. This front will move east this morning and will turn winds to the west and northwest the Mid Atlantic region. The front was coming through KBLF at the 06Z start of the TAF forecast period and will reach KLYH and KDAN around 14z/9AM. Wind gusts today behind the front will be 20 to 35 kts, with up to 45 knots along ridges higher than 4000ft agl.

Moist west flow should keep ceilings mountains in the MVFR range with western slopes, KBLF down to IFR/LIFR. IFR/MVFR conditions will likely linger into tonight. VFR conditions expected east of the Blue Ridge once the front moves east of the piedmont and downslope winds increase. Isolated showers along the front are expected on western slopes early this morning, but no visibility restriction is expected at KLWB nor KBLF.

The altimeter at Blacksburg, KBCB, is out of service and the observation will not be available until further notice. AMD NOT SKED has been added to the KBCB TAF.

Extended Aviation Discussion .

A punch of dry air should allow all sites to become VFR on Monday. An upper level disturbance will likely bring sub-VFR ceilings back across the mountains Monday night into Tuesday morning. High pressure will keep VFR conditions through the rest of the week.

EQUIPMENT. As of 1255 AM EST Sunday .

The altimeter at Blacksburg, KBCB, is out of service and the observation will not be available until further notice. Temperature data for Blacksburg will continue to be provided for the climate products from observations at the NWS office.

RNK WATCHES/WARNINGS/ADVISORIES. VA . Wind Advisory until 6 PM EST this evening for VAZ015>017. NC . Wind Advisory until 6 PM EST this evening for NCZ001-002-018. WV . None.

SYNOPSIS . AMS NEAR TERM . AMS SHORT TERM . KK LONG TERM . BMG/PC AVIATION . AMS/RCS EQUIPMENT . AMS


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Roanoke, Roanoke Regional Airport, VA3 mi50 minWSW 610.00 miMostly Cloudy51°F41°F69%1009.5 hPa

Link to 5 minute data for KROA

Wind History from ROA (wind in knots)
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Last 24hrSE9SE8SE10SE10SE9SE10SE10E9S11SE8SE9SE7SE9SE6E6--SE3CalmCalm4E4SW33SW6
1 day agoN12NW9NW7NW10N10N6N7N4N6NE5NE8S5CalmCalmN3CalmE4SE4SE5SE3SE7SE7SE7E7
2 days agoNW17
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

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Wind Forecast for Blacksburg, VA (4,6,7,8)
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Ground Weather Radar Station Blacksburg, VA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.