Alert archive / West Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

June 14, 2021Greenbrier County, West Virginia

NWS Blacksburg, VA issued this special weather statement at Jun 14, 2021, 10:04 PM EDT for Greenbrier County, West Virginia. It was in force for 26 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 14, 2021, 10:04 PM EDT (02:04 UTC)
Expired
Jun 14, 2021, 10:30 PM EDT
In force
26 min
Issued by
NWS Blacksburg, VA

County Greenbrier County, WV

The radar

The Charleston,WV radar (KRLX), 114 km from the middle of the area, began a volume at 02:05 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 00:00Z, 2.1 hours before the alert went out and 132 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-pSkew-T log-p diagram, Roanoke, VA at 00:00Z on 2021-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 00:00Z on 2021-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
18 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
2122 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

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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 14, 1:08 PM EDT, 8 hours 56 minutes earlier.

Area forecast discussion, Jun 14, 1:08 PM EDT, 8 hours 56 minutes before
Area Forecast Discussion
National Weather Service Blacksburg VA
108 PM EDT Mon Jun 14 2021

.SYNOPSIS...
A front enters the mountains this evening, exiting the piedmont
by dawn Tuesday. High pressure with drier and cooler air will
cover the area mid to late week. The next chance of showers and
thunderstorms returns for the weekend.

&&

.NEAR TERM /THROUGH TUESDAY/...
As of 1255 PM EDT Monday...

...A few storms possible in the piedmont through early evening,
with weakening line moving to the mountains this evening...

Models continue to advertise lesser coverage of showers/storms
this afternoon in our forecast area, with the 12z nam more
robust along/southeast of a line from MTV-UKF. Will lean this
way as the HRRR/RAP also show this, with less overall coverage
north, til later this evening with the front moving into the
mountains. This line stretches out across the WV panhandle to
southern WV but weakening as it moves toward/into our
WV/Alleghanys and far SW VA after 01z. Will maintain low chance
pops for now.

Drier air infiltrates the area overnight with dewpoints falling
into the 50s by dawn Tuesday.

Lows will range from the mid to upper 50s across the mountains,
to mid 60s east.

Tuesday shows another shortwave moving across, with limited
upslope moisture. A few showers or storms may work across the
mountains of WV in the afternoon, but overall very limited.

Winds will pick up behind the shortwave with some gusts to 20
mph, with lower humidity will feel more comfortable.
Temperatures will top out in the 70s west, to mid 80s east.

Forecast confidence above average on all elements, except
average on pops this afternoon/evening.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY NIGHT/...
As of 1250 PM EDT Monday...

High pressure and dry conditions dominate the midweek...

A closed upper low stalled over eastern Canada will place us solidly
in northwest flow. The drier air and surface high pressure over the
Mid-Atlantic will suppress the probability of rain showers through
this forecast period. There is a slight chance of a sparse shower
over the WV mountains Tuesday Night due to upslope flow.
Temperatures fall a bit Wednesday and Thursday, with overnight lows
reaching down into the 40s for mountain valley areas, and low 50s
for most of the rest of the CWA. Highs will stick in the 70s and 80s
through this forecast period.

&&

.LONG TERM /FRIDAY THROUGH MONDAY/...
As of 1250 PM EDT Monday...

Dry again Friday, but a cold front over the weekend heralds the
return of showers...

As we remain in northwest flow with the upper cutoff low slowly
moving eastward, as well as the surface high, Friday will be dry
much like the middle of the week. A cold front approaches from the
Midwest, as synoptic scale flow turns to the south/southwest with
high pressure moving off the coast to our east. This will start to
moisten the atmosphere on Friday and ahead of the front Saturday.
Guidance is in good agreement that the front will enter the area
Saturday and bring with it scattered showers and storms. The front
stalls over us and becomes more of a zonally aligned stationary
front by Sunday. That boundary will act as a focus for showers and
storms to form both Sunday and Monday. The weekend will also warm
temperatures back up from the slightly cooler conditions of the
previous week. By Saturday temperatures will be several degrees
above normal and ought to stay that way through the weekend.

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
As of 1254 PM EDT Monday...

Will likely remain VFR through all of this taf period. Exception
may be a bit of fog near LWB late tonight but with a few more
clouds, this may not occur so left it out for now.

Any showers/storms this afternoon look to mainly stay south and
east of terminals with DAN likely the closest to convection.
Will amend if necessary.

Behind frontal passage Tuesday look for northwest winds to
average around 6 to 12 kts, with gusts to 15 to 20 kts.

Above average confidence for all elements except average of fog
late tonight.

Extended Aviation Discussion...

Mainly VFR into Friday outside of any late night fog in the
mountains with high pressure settling in over the region.
Moisture increases ahead of front Saturday with scattered
showers/few storms anticipated. Mainly VFR outside any storms.

&&

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

&&

SYNOPSIS...AMS/WP
NEAR TERM...WP
SHORT TERM...VFJ
LONG TERM...VFJ
AVIATION...WP
Hazardous weather outlook, Jun 14, 2:30 PM EDT, 7 hours 34 minutes before
Hazardous Weather Outlook
National Weather Service Blacksburg VA
230 PM EDT Mon Jun 14 2021

NCZ004>006-VAZ043-044-058-059-151830-
Stokes-Rockingham-Caswell-Henry-Pittsylvania-Halifax-Charlotte-
230 PM EDT Mon Jun 14 2021

This Hazardous Weather Outlook is for north central North Carolina
and south central Virginia.

.DAY ONE...This afternoon and tonight.

Scattered showers and thunderstorms this afternoon may become strong
to severe. Damaging wind is the main threat. Any of the more intense
storms will also produce very heavy rain with may lead to localized
flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ001>003-018>020-VAZ007-009>020-022>024-032>035-045>047-WVZ042>044-
507-508-151830-
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Yadkin-Tazewell-Smyth-Bland-
Giles-Wythe-Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-
Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-Patrick-Franklin-
Bedford-Amherst-Campbell-Appomattox-Buckingham-Mercer-Summers-Monroe-
Eastern Greenbrier-Western Greenbrier-
230 PM EDT Mon Jun 14 2021

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

.DAY ONE...This afternoon and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 14, 4:06 PM EDT, 5 hours 58 minutes before
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Special weather statement, Jun 14, 4:23 PM EDT, 5 hours 41 minutes before
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Local storm report, Jun 14, 5:20 PM EDT, 4 hours 44 minutes before
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Local storm report, Jun 14, 6:31 PM EDT, 3 hours 33 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 10:25 PM EDTSpecial Weather StatementRNKGreenbrier35 min

Nearby

Special Weather Statements in West Virginia, 2021Every special weather statement in 2021

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.