Alert archive / Virginia / Special Weather Statements in 2020

Special Weather Statement, NWS Blacksburg, VA

June 25, 2020Rockbridge County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jun 25, 2020, 4:11 PM EDT for Rockbridge County, Virginia. It was in force for 49 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: Jun 25, 2020, 4:11 PM EDT (20:11 UTC)
Expired: Jun 25, 2020, 5:00 PM EDT
In force: 49 min
Issued by: NWS Blacksburg, VA

County Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 128 km from the middle of the area, began a volume at 20:13 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

Roanoke, VA (KRNK), launched 12:00Z, 8.2 hours before the alert went out and 76 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1074 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -56 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</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 Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Jun 25, 1:32 PM EDT, 2 hours 39 minutes earlier.

Area forecast discussion, Jun 25, 1:32 PM EDT, 2 hours 39 minutes before

Area Forecast Discussion
National Weather Service Blacksburg VA
132 PM EDT Thu Jun 25 2020

.SYNOPSIS...
A frontal boundary will weaken over the area this evening. High
pressure builds over the region Friday and Saturday.

&&

.NEAR TERM /THROUGH FRIDAY/...
As of 110 PM EDT Thursday...

Lee trough set up this afternoon with limited frontal
interaction in our area. There will be scattered showers/storms
forming and mainly east of the foothills this afternoon, with
isolated west. The severe threat remains marginal, with best
CAPES/upper support distributed east of the Highway 501 corridor
from Lynchburg to South Boston. Still cannot rule out isolated
gusty winds. As we head through sunset, storms erode and will
see skies arrive at mostly clear overnight. Patchy fog where it
rains and in river valleys.

Lows stay elevated in the mid 50s to lower 60s.

Sunshine and drier air tomorrow under subsidence aloft. Clouds
may increase in the afternoon over the mountains as a warm front
lifts north across the Ohio Valley and northwest flow aloft
allows for cirrus blowoff from storms to move this way. A few
showers/storms are possible west of I-77, but moreso over
Ohio/KY, so kept it dry. Seasonable temperatures with highs int
he upper 70s to lower 80s west, to mid 80s to near 90 east.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/...
As of 130 PM EDT Thursday...

High pressure over the Southeast will head offshore to give way for
an approaching cold front over the Ohio River Valley on Friday
night. This cold front should trail behind a departing upper level
trough over the Northeast and become oriented parallel to the
prevailing westerly flow aloft. As a result, the frontal boundary
will slowly sag southward toward the Mid Atlantic during Saturday
and Sunday, which will spark an increasing threat of scattered
showers and thunderstorms. The highest confidence for convection
resides along and west of the Blue Ridge during both days, but it
may become more widespread on Sunday as the frontal boundary draws
closer. Any stronger storms on Sunday may pose a potential for
severe threats or localized flooding as ample instability and
increasing dynamics aloft should aid in lift, but confidence is not
high enough to pinpoint where for the HWO.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
As of 130 PM EDT Thursday...

A cold front will drift slowly southward over the Mid Atlantic
during Monday through Wednesday, but its west-to-east orientation
will nearly parallel the flow aloft and hinder its forward progress.
Thus, more chances of showers and thunderstorms will prevail through
the first half of the work week each day. Localized severe and flood
threats may increase if any storms become strong enough or train
over the same regions. The models remain in fairly good agreement
about the slow progress of this cold front until Wednesday night and
Thursday when the ECMWF finally pushes the frontal boundary toward
the Gulf Coast. The GFS remains a little slower in shoving the cold
front and its associated moisture as far southward, but the latest
run is trending somewhat closer toward the ECMWF solution.
Therefore, rainfall chances will decrease on Thursday with any
potential convection over North Carolina, while drier air pushes
southward into southeast West Virginia and central Virginia.

&&

.AVIATION /17Z THURSDAY THROUGH MONDAY/...
As of 115 PM EDT Thursday...

VFR through the period.

Exceptions: Widely scattered showers/thunderstorms this
afternoon mainly east of the Blue Ridge, but limited coverage
overall so kept VCSH or VCTS in at LYH/DAN with tempo in DAN for
a couple hrs 20-22z with MVFR showers.

Have IFR to LIFR fog at LWB tonight and none elsewhere.

Extended Aviation Discussion...

Mainly VFR into this weekend. Coverage of storms increases
Sunday and Monday as a cold front approaches the region.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...None.
NC...None.
WV...None.

&&

SYNOPSIS...RCS/WP
NEAR TERM...WP
SHORT TERM...BMG
LONG TERM...RR
AVIATION...RCS/WP

Hazardous weather outlook, Jun 25, 3:53 AM EDT, 12 hours 18 minutes before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
353 AM EDT Thu Jun 25 2020

NCZ003>006-020-VAZ014-017-022>024-032>035-043>047-058-059-260800-
Surry-Stokes-Rockingham-Caswell-Yadkin-Montgomery-Floyd-Roanoke-
Botetourt-Rockbridge-Patrick-Franklin-Bedford-Amherst-Henry-
Pittsylvania-Campbell-Appomattox-Buckingham-Halifax-Charlotte-
353 AM EDT Thu Jun 25 2020

This Hazardous Weather Outlook is for north central North Carolina,
northwest North Carolina, central Virginia, south central Virginia,
southwest Virginia and west central Virginia.

.DAY ONE...Today and tonight.

Scattered showers and thunderstorms will be capable of producing
damaging winds and possibly large hail this afternoon and evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ001-002-018-019-VAZ007-009>013-015-016-018>020-WVZ042>044-507-508-
260800-
Ashe-Alleghany NC-Watauga-Wilkes-Tazewell-Smyth-Bland-Giles-Wythe-
Pulaski-Grayson-Carroll-Craig-Alleghany VA-Bath-Mercer-Summers-
Monroe-Eastern Greenbrier-Western Greenbrier-
353 AM EDT Thu Jun 25 2020

This Hazardous Weather Outlook is for northwest North Carolina,
southwest Virginia, west central Virginia and southeast West
Virginia.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

RCS

In the hours before

Special weather statement, Jun 25, 3:19 PM EDT, 52 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
319 PM EDT Thu Jun 25 2020

VAZ019-020-024-WVZ507-252000-
Bath-Rockbridge-Alleghany-Eastern Greenbrier-
319 PM EDT Thu Jun 25 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ALLEGHANY...WESTERN
ROCKBRIDGE...AND BATH COUNTIES IN WEST CENTRAL VIRGINIA...
SOUTHEASTERN GREENBRIER COUNTY IN SOUTHEASTERN WEST VIRGINIA AND THE
CITY OF COVINGTON...

At 318 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 8 miles east of Burnsville to Hot Springs
to near Alvin. Movement was southeast at 15 mph.

Winds in excess of 30 mph and pea size hail are possible with these
storms.

Locations impacted include...
Alleghany...
Covington...
Clifton Forge...
White Sulphur Springs...
Goshen...
Millboro...
and Neola.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3818 7952 3815 7953 3817 7949 3817 7944
      3809 7949 3798 7930 3776 7968 3780 7982
      3772 7990 3770 8029 3805 8031 3804 8016
      3806 8011 3807 7985 3821 7961
TIME...MOT...LOC 1918Z 345DEG 12KT 3821 7951 3802 7984 3801 8021

RAB

Special weather statement, Jun 25, 3:57 PM EDT, 14 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
357 PM EDT Thu Jun 25 2020

VAZ043-252045-
Henry-
357 PM EDT Thu Jun 25 2020

...A STRONG THUNDERSTORM WILL AFFECT HENRY COUNTY AND THE CITY OF
MARTINSVILLE...

At 356 PM EDT, a strong thunderstorm was located near Fieldale, or
near Bassett, moving east at 15 mph.

Winds in excess of 30 mph are possible with this storm along with
heavy rainfall.

Locations impacted include...
Martinsville...
Spencer...
Bassett...
Axton...
Leatherwood...
Villa Heights...
and Chatmoss.

Very heavy rainfall is occurring with this storm, and may cause
localized flooding, especially in urban areas. Do not drive your
vehicle through flooded roadways.

LAT...LON 3666 8006 3672 8009 3677 8009 3678 8001
      3679 8002 3681 7988 3679 7981 3680 7979
      3680 7976 3679 7976 3682 7973 3683 7967
      3685 7964 3663 7969 3660 8005
TIME...MOT...LOC 1956Z 252DEG 14KT 3671 8000

RAB

Special weather statement, Jun 25, 4:11 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
411 PM EDT Thu Jun 25 2020

VAZ024-252100-
Rockbridge-
411 PM EDT Thu Jun 25 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN ROCKBRIDGE COUNTY...

At 410 PM EDT, a strong thunderstorm was located near Goshen, moving
southeast at 15 mph.

Winds in excess of 30 mph and penny size hail are possible with this
storm.  Nickel-sized hail was reported by the public near Goshen at
438 PM EDT.

Locations impacted include...
Goshen...
Rockbridge Baths...
Cornwall...
Bells Valley...
Fairfield...
Brownsburg...
and Vesuvius.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3793 7920 3789 7915 3786 7915 3780 7917
      3779 7920 3781 7923 3779 7927 3772 7932
      3774 7931 3796 7958 3799 7955 3805 7942
TIME...MOT...LOC 2010Z 321DEG 14KT 3797 7944

RAB

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 25, 3:19 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, City of Covington	41 min
Jun 25, 3:57 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	48 min
Jun 25, 5:05 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania	40 min
Jun 25, 5:11 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	34 min
Jun 25, 5:50 PM EDT	Special Weather Statement	RNK	Pittsylvania	25 min
Jun 25, 5:53 PM EDT	Special Weather Statement	RNK	Henry	52 min
Jun 25, 6:22 PM EDT	Special Weather Statement	RNK	Halifax	53 min

Nearby

Special Weather Statements in Virginia, 2020 Every special weather statement in 2020

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.