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arlwx

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About arlwx

  1. April Discobs Thread

    At 5 am: DCA 37 BWI 34 IAD 32 The local icebox (Fort Meade) is down to 30. Most of Central VA (north of CHO-RIC) has hit freezing. The Shenandoah Valley is flirting with damaging the apple blossoms.
  2. April Discobs Thread

    Freeze watch up for tonight in the DC suburbs. URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 408 AM EDT Tue Apr 17 2018 MDZ003>006-503>507-VAZ036>040-050>053-501-502-505-506-171615- /O.NEW.KLWX.FZ.A.0002.180418T0600Z-180418T1300Z/ Washington-Frederick MD-Carroll-Northern Baltimore- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Prince William/Manassas/Manassas Park-Fairfax-Northern Fauquier- Southern Fauquier-Western Loudoun-Eastern Loudoun- Including the cities of Hagerstown, Frederick, Ballenger Creek, Eldersburg, Westminster, Reisterstown, Cockeysville, Germantown, Damascus, Bethesda, Rockville, Gaithersburg, Silver Spring, Lisbon, Columbia, Ellicott City, Jarrettsville, Lovingston, Charlottesville, Stanardsville, Madison, Washington, Orange, Gordonsville, Culpeper, Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Reston, Herndon, Annandale, Centreville, Chantilly, McLean, Franconia, Warrenton, Turnbull, Purcellville, Leesburg, Ashburn, and Sterling 408 AM EDT Tue Apr 17 2018 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING... The National Weather Service in Baltimore MD/Washington has issued a Freeze Watch, which is in effect from late tonight through Wednesday morning. * TEMPERATURES...32 degrees or less. * IMPACTS...Frost and freeze conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold.
  3. April Discobs Thread

    Meanwhile, the apples may get frozen tonight. Washington-Frederick MD-Carroll-Augusta-Rockingham-Shenandoah- Frederick VA-Page-Warren-Clarke-Northern Virginia Blue Ridge- Central Virginia Blue Ridge-Morgan-Berkeley-Jefferson- Including the cities of Hagerstown, Frederick, Ballenger Creek, Eldersburg, Westminster, Staunton, Waynesboro, Stuarts Draft, Harrisonburg, Strasburg, Woodstock, Mount Jackson, New Market, Winchester, Luray, Shenandoah, Stanley, Front Royal, Berryville, Big Meadows, Wintergreen, Paw Paw, Martinsburg, Charles Town, and Shepherdstown 429 AM EDT Mon Apr 16 2018 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... The National Weather Service in Baltimore MD/Washington has issued a Freeze Watch, which is in effect from late tonight through Tuesday morning. * TEMPERATURES...32 degrees or below. * IMPACTS...Frost and freeze conditions may damage sensitive vegetation. Take steps now to protect tender plants from the cold.
  4. April Discobs Thread

    DCA picked up 1.45 in two hours at 4 am. The gauge at Four Mile Run says it got about 1.6 inches in that period. Cameron Run briefly exceeded flood stage (are there any fish on the Beltway?) Accotink Creek IS above flood stage (Woodyard Road is blocked at the stream) People using the express lanes on I-95/I-395 are being forced back onto the northbound main lanes because of standing water. I-66 east: people are diverted off at exit 72. I-66 west-bound: From DC, people get diverted into Rosslyn. I-295 Northbound: high standing water under Benning Road. GW parkway northbound from Old Town: Blocked/diverted at the marina south of DCA (use Rt 1 to get to DCA instead) More in MD (including lanes blocked on I-495 and the BW parkway)
  5. March 20-21 Storm Banter and Party Thread

    WHO ordered this s*** on the day before I was scheduled to attend training??? Fortunately, they offered to let me have credit towards future training. This is TWICE this calendar year that the weather has messed with my training, but the first time it was to be free CPE.
  6. At 10 am, I got 1.4" in Arlington VA on top of a truck. Heavy wet snow, probably some compaction in just the two hours since it started sticking.
  7. March 20-21 Storm Banter and Party Thread

    As a warminista: Snow belongs in Febrrary. Early school closings upcoming.
  8. At 12:10 PM in the Crystal City area: Rain mixed with bits of sleet Car indicating 33 degrees.
  9. March 20-21 Potential - STORM MODE THREAD

    LWX is implying that the mountains get warnings about storm 1 and everyone is on watch for storm 2.
  10. March 20-21 Potential - STORM MODE THREAD

    New WSWs up. URGENT - WINTER WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 429 AM EDT Tue Mar 20 2018 MDZ003-VAZ028-WVZ051-052-201630- /O.UPG.KLWX.WW.Y.0018.180320T1000Z-180320T2200Z/ /O.EXB.KLWX.WS.W.0006.180320T1000Z-180321T0000Z/ /O.CON.KLWX.WS.A.0004.180321T0400Z-180322T0000Z/ Washington-Frederick VA-Morgan-Berkeley- 429 AM EDT Tue Mar 20 2018 ...WINTER STORM WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY EVENING... * WHAT...Mixed precipitation changing to snow this morning, which could be heavy at times. Snow accumulations of 4 to 6 inches are expected today, along with a light glaze of ice. Additional heavy snow is possible late tonight through Wednesday afternoon, with additional snow accumulations of 5 or more inches possible. * WHERE...In Maryland, Washington. In Virginia, Frederick. In West Virginia, Morgan and Berkeley. * WHEN...For the Winter Storm Warning, until 8 PM EDT this evening. For the Winter Storm Watch, from late tonight through Wednesday evening. * ADDITIONAL DETAILS...Plan on difficult travel conditions. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means significant amounts of snow, sleet and ice will make travel very hazardous or impossible. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts. && $$ URGENT - WINTER WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 429 AM EDT Tue Mar 20 2018 MDZ501-502-WVZ050-055-501>504-201630- /O.CON.KLWX.WS.W.0006.180320T0900Z-180321T0000Z/ /O.CON.KLWX.WS.A.0004.180321T0000Z-180321T2100Z/ Extreme Western Allegany-Central and Eastern Allegany-Hampshire- Hardy-Western Grant-Eastern Grant-Western Mineral-Eastern Mineral- 429 AM EDT Tue Mar 20 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...WINTER STORM WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY AFTERNOON... * WHAT...Heavy snow expected today with snow accumulations of 5 to 10 inches. Additional heavy snow is possible from Tuesday evening through Wednesday afternoon, with additional snow accumulations of 5 or more inches possible. * WHERE...Portions of western Maryland and eastern West Virginia. * WHEN...For the Winter Storm Warning, until 8 PM EDT this evening. For the Winter Storm Watch, from this evening through Wednesday afternoon. * ADDITIONAL DETAILS...Plan on difficult travel conditions. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means significant amounts of snow, sleet and ice will make travel very hazardous or impossible. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts. &&
  11. March 1-2 wind event

    In the DC area, that is.
  12. March 1-2 wind event

    Here in Arlington, lost power around 2:30, just now got it back. WTOP is reporting on downed trees.
  13. PD3.5 Lite Obs and Nowcasting

    DCA claims it got .42 in precip, but only about .23 of that was listed as snow (actually quite a bit of sleet). So I believe DCA measuring 0.2 snow. At 100 feet here in Arlington, I got a cartopping of sleet, but it looks like the follow-on rain washed that away. DCA stayed at 34 during the snow/sleet part, but sometimes I go out at that temperature and find slick spots. So I believe the measurement of 1.0, map showing it as Grace Hopper Park. (possibly grass/decorator snow).
  14. Weekend Snowfest/Rainfest/Mixed Mess?

    The latest from LWX: .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/... Surface low pressure will develop over the Tennessee Valley Saturday morning, driven by a digging upper trough flicking across the Great Lakes/Ohio Valley. Transient cold air in place will result in a myriad of precipitation types Saturday afternoon and evening. The latest guidance has trended a little cooler with a little more precipitation, with appreciable snow/sleet amounts of 2-4 inches seeming more likely along the western ridges and the Mason-Dixon line, tapering to an inch or less south of US 50/E of the Blue Ridge, and mainly rain for southern Maryland. Snow-to-liquid ratios are still expected to be below climatology even in areas of all snow due to most of the column where precipitation is developing being above -10 C, though upper jet dynamics could compensate for this somewhat especially over northern Maryland. A light glaze of freezing rain also appears likely for much of the area except northern MD (mainly snow) and extreme southern MD (plain rain). Slightly higher amounts around a tenth of an inch are possible over the central Shenandoah Valley where shallow cold air would be more easily trapped. Surface ridge axis/weak wedge orients itself more or less along I-95 so believe the metros could see a touch of freezing rain as well (usually along this ridge axis is where lower dew points/cooler air pools). Latest guidance is in very good agreement on timing, with little or no precipitation entering the CWA before noon. Clouds and precipitation quickly increase from SW to NE between 1 and 4pm, with the entire area seeing some sort of precipitation by 6 or 7pm. Conditions clear just as quickly around or shortly after midnight, perhaps lingering a few extra hours over the western slopes.
  15. Weekend Snowfest/Rainfest/Mixed Mess?

    The latest from LWX: An upper shortwave diving towards the Gulf of Mexico will be deflected by a strong subtropical ridge, causing it to veer instead towards the Mid-Atlantic. Surface low pressure likely develops over the Tennessee Valley and heads offshore of the Outer Banks of North Carolina by day`s end. Cold air will be in place only briefly, so expect precipitation to start as snow or a snow/sleet mix from SW to NE Saturday midday/afternoon, then change to a mix of rain/sleet and possibly freezing rain. Snow and sleet accumulations should be limited with poor snow-to-liquid ratios (generally an inch or less, except 1-3 for higher elevations and along the Mason-Dixon line). However, this combined with the potential for light icing from patchy freezing rain Saturday evening could still result in slippery travel. The mitigating factor will be warm ground temperatures from several mild days preceding this event. Precipitation should end quickly after midnight as low pressure speeds out to sea. Winds look pretty light late Saturday night, and with temperatures below freezing any residual moisture on the ground will likely turn to ice on untreated surfaces.
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