Alert archive / Virginia / Special Weather Statements in 2018
Special Weather Statement, NWS Morristown, TN
NWS Morristown, TN issued this special weather statement at May 15, 2018, 4:21 PM EDT for Lee County, Virginia. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 15, 2018, 4:21 PM EDT (20:21 UTC)
- Expired
- May 15, 2018, 4:45 PM EDT
- In force
- 24 min
- Issued by
- NWS Morristown, TN
County Lee County, VA
The radar
The Knoxville radar (KMRX), 65 km from the middle of the area, began a volume at 20:21 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.4 hours before the alert went out and 301 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 258 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 910 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -50 m²/s²
- 0-3 km storm-relative helicity
- -23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Morristown, TN wrote its last area forecast discussion before this special weather statement went out at May 15, 3:33 PM EDT, 48 minutes earlier.
Area forecast discussion, May 15, 3:33 PM EDT, 48 minutes before
Area Forecast Discussion National Weather Service Morristown TN 333 PM EDT Tue May 15 2018 .SHORT TERM...(Tonight and Wednesday)... The primary focus of convection so far today has been over the plateau, with a lesser amount over the Appalachians as time has wore on. This should change however as low level convergence is forecast to shift off the terrain and over the valley region through the evening hours. Couple this with the likelihood of some outflow boundaries spreading into the lower elevation areas, and the focus for rainfall through the evening and early part of tonight should be over the Tennessee Valley. Valley and Plateau convection will largely be diurnally driven, so expect a lull in rainfall activity tonight there, while the Appalachians maintain higher rain chances as energy from the upper low to our south moves this direction. For Wednesday, rainfall chances and coverage should be a little higher. The mountains will likely see ongoing convection by daybreak, however between shortwave energy moving east through Tennessee and the tropical upper low to our south continuing to move north into the Carolinas, showers and thunderstorms should be a bit more widespread tomorrow. .LONG TERM...(Wednesday night through Monday)... A prolonged summertime tropical tap will bring a greater than normal coverage of precipitation to the area during the latter half of the week. Weak low pressure over the northeastern Gulf will initiate the tap, but even as the low moves north of the area late this week, southerly flow into the departing system will continue to keep us under the influence of tropical moisture well into the weekend. The ridge then strengthens and warms us up, enough to keep scattered diurnal convection in the forecast Sun- Tues. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 66 81 65 83 / 40 40 40 60 Knoxville McGhee Tyson Airport, TN 65 80 64 80 / 40 50 50 70 Oak Ridge, TN 65 81 65 81 / 40 50 50 70 Tri Cities Airport, TN 62 77 62 79 / 40 80 60 80 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && CD/GC
Hazardous weather outlook, May 15, 3:39 PM EDT, 42 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Morristown TN 339 PM EDT Tue May 15 2018 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-161945- Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins- Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen- Northwest Cocke-Cocke Smoky Mountains-Northwest Greene- Southeast Greene-Washington TN-Unicoi-Northwest Carter- Southeast Carter-Roane-Loudon-Knox-Jefferson-NW Blount- Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains- Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe- Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee- Wise-Scott-Russell-Washington- 339 PM EDT Tue May 15 2018 /239 PM CDT Tue May 15 2018/ This Hazardous Weather Outlook is for portions of Southwest North Carolina...East Tennessee and Southwest Virginia. .DAY ONE...This Afternoon and Tonight Scattered showers and thunderstorms will persist over the Appalachians and Plateau regions through late this afternoon before shifting into the valley. While widespread severe storms are not expected, a few strong to severe storms could occur. In those cases, some large hail and heavy rains would be the primary threats. .DAYS TWO THROUGH SEVEN...Wednesday through Monday A slow-moving low pressure system originating in the Gulf of Mexico will spread abundant moisture into the area Wednesday through Friday. Locally heavy rainfall will be possible with any thunderstorms that develop during this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, May 15, 3:06 PM EDT, 1 hour 15 minutes before
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</html>Special weather statement, May 15, 3:38 PM EDT, 43 minutes before
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</html>Special weather statement, May 15, 4:21 PM EDT, 0 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 2:28 PM EDT | Special Weather Statement | MRX | Sequatchie | 17 min |
| May 15, 2:47 PM EDT | Special Weather Statement | MRX | Anderson | 28 min |
| May 15, 2:51 PM EDT | Special Weather Statement | MRX | Bledsoe | 24 min |
| May 15, 2:52 PM EDT | Special Weather Statement | MRX | Marion | 23 min |
| May 15, 3:06 PM EDT | Special Weather Statement | MRX | Anderson | 39 min |
| May 15, 3:12 PM EDT | Special Weather Statement | MRX | Marion, Rhea, Sequatchie | 63 min |
| May 15, 3:26 PM EDT | Special Weather Statement | MRX | Campbell | 49 min |
| May 15, 3:38 PM EDT | Special Weather Statement | MRX | Anderson | 52 min |
| May 15, 4:02 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Marion, Sequatchie | 3 hr |
| May 15, 4:04 PM EDT | Areal Flood Advisory | MRX | Anderson, Campbell, Scott | 3 hr |
| May 15, 4:23 PM EDT | Areal Flood Advisory | MRX | Polk | 2 hr |
| May 15, 4:41 PM EDT | Areal Flood Advisory | MRX | Polk | 2 hr |
| May 15, 4:55 PM EDT | Areal Flood Advisory | MRX | McMinn, Monroe | 3 hr |
| May 15, 5:16 PM EDT | Special Weather Statement | MRX | Jefferson | 44 min |
| May 15, 5:24 PM EDT | Special Weather Statement | MRX | Hancock | 51 min |
| May 15, 5:29 PM EDT | Special Weather Statement | MRX | Hancock | 46 min |
| May 15, 5:32 PM EDT | Areal Flood Advisory | MRX | Bradley, Polk | 118 min |
| May 15, 5:37 PM EDT | Special Weather Statement | MRX | Bradley | 38 min |
| May 15, 5:45 PM EDT | Special Weather Statement | MRX | Bradley | 45 min |
| May 15, 5:58 PM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton | 2 hr |
| May 15, 6:08 PM EDT | Special Weather Statement | MRX | Blount, Grainger, Knox | 37 min |
| May 15, 6:13 PM EDT | Severe Thunderstorm Warning | MRX | Jefferson, Knox, Sevier | 47 min |
| May 15, 6:20 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Jefferson | 40 min |
| May 15, 6:41 PM EDT | Areal Flood Advisory | MRX | Knox | 2 hr |
| May 15, 6:58 PM EDT | Areal Flood Advisory | MRX | Claiborne, Grainger, Hancock | 2 hr |
| May 15, 3:18 PM EDT | Special Weather Statement | MRX | Wise, City of Norton | 57 min |
| May 15, 5:05 PM EDT | Areal Flood Advisory | MRX | Lee | 115 min |
| May 15, 5:48 PM EDT | Special Weather Statement | MRX | Scott | 42 min |
| May 15, 6:38 PM EDT | Areal Flood Advisory | MRX | Scott | 2 hr |
| May 15, 6:46 PM EDT | Areal Flood Advisory | MRX | Russell | 119 min |
| May 15, 7:03 PM EDT | Special Weather Statement | MRX | Russell | 42 min |
| May 15, 7:51 PM EDT | Areal Flood Advisory | MRX | Russell, Washington | 114 min |
Nearby
Special Weather Statements in Virginia, 2018Every special weather statement in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.