Alert archive / Virginia / Flash Flood Warnings in 2020

Flash Flood Warning 6, NWS Blacksburg, VA

April 13, 2020Smyth County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Apr 13, 2020, 1:32 AM EDT for Smyth County, Virginia. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 13, 2020, 1:32 AM EDT (05:32 UTC)
Expired
Apr 13, 2020, 10:30 AM EDT
In force
9 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Smyth County, VA

The radar

The Roanoke radar (KFCX), 127 km from the middle of the area, began a volume at 05:32 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 5.5 hours before the alert went out and 184 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, Greensboro/Hi Pt, NC at 00:00Z on 2020-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, Greensboro/Hi Pt, NC at 00:00Z on 2020-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 299 square meters per square second.19395878Sfc1 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
3 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
712 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
299 m²/s²
0-3 km storm-relative helicity
489 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

526 
WGUS51 KRNK 130532
FFWRNK
VAC173-131130-
/O.NEW.KRNK.FF.W.0006.200413T0532Z-200413T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service BLACKSBURG VA
132 AM EDT Mon Apr 13 2020

The National Weather Service in BLACKSBURG has issued a

* Flash Flood Warning for...
  Northwestern Smyth County in southwestern Virginia...

* Until 730 AM EDT.

* At 131 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Saltville...
  Chilhowie...
  Quarry...
  Allison Gap...
  Broadford...
  and Adwolf.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Stay away or be swept away. River banks and culverts can become
unstable and unsafe.

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, to the National Weather Service
by calling toll free at 1...8 6 6...2 1 5...4 3 2 4. Reports and
pictures can also be shared on the National Weather Service
Blacksburg Facebook page and on Twitter.

&&

LAT...LON 3696 8170 3694 8168 3693 8169 3693 8168
      3680 8157 3675 8168 3680 8170 3692 8183

FLASH FLOOD...RADAR INDICATED

$$

AS
4 follow-up statements
558 
WGUS71 KRNK 130650
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
250 AM EDT Mon Apr 13 2020

VAC173-131130-
/O.CON.KRNK.FF.W.0006.000000T0000Z-200413T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Smyth VA-
250 AM EDT Mon Apr 13 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM EDT FOR 
NORTHWESTERN SMYTH COUNTY...

At 250 AM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to three inches of rain have already
fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Some locations that will experience flooding include...
Saltville...
Chilhowie...
Quarry...
Allison Gap...
Broadford...
and Adwolf.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, to the National Weather Service
by calling toll free at 1...8 6 6...2 1 5...4 3 2 4. Reports and
pictures can also be shared on the National Weather Service
Blacksburg Facebook page and on Twitter.

&&

LAT...LON 3696 8170 3694 8168 3693 8169 3693 8168
      3680 8157 3675 8168 3680 8170 3692 8183

FLASH FLOOD...RADAR INDICATED

$$

AS
124 
WGUS71 KRNK 130938
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
538 AM EDT Mon Apr 13 2020

VAC173-131130-
/O.CON.KRNK.FF.W.0006.000000T0000Z-200413T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Smyth VA-
538 AM EDT Mon Apr 13 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM EDT FOR 
WESTERN SMYTH COUNTY...

At 536 AM EDT, emergency management reported heavy rain during the 
night had led to considerable flooding falling in the Saltville 
area. Some roads were flooded and creeks were out of their banks. Up 
to three inches of rain fell across this region of Smyth County 
since midnight. Flash flooding is already occurring.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Emergency management.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Excessive rainfall over the warned area will cause mud slides near
steep terrain. The mud slide can consist of rock, mud, vegetation and
other loose materials.

Some locations that will experience flooding include...
Saltville...
Chilhowie...
Quarry...
Allison Gap...
Broadford...
and Adwolf.

This includes the following streams and drainages...
Laurel Springs Creek, Beaver Creek, North Fork Holston River,
Robertson Branch and Tattle Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, to the National Weather Service
by calling toll free at 1...8 6 6...2 1 5...4 3 2 4. Reports and
pictures can also be shared on the National Weather Service
Blacksburg Facebook page and on Twitter.

&&

LAT...LON 3696 8170 3694 8168 3693 8169 3693 8168
      3680 8157 3675 8168 3680 8170 3692 8183

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

RAB
703 
WGUS51 KRNK 131030
FFWRNK
VAC173-131430-
/O.EXT.KRNK.FF.W.0006.000000T0000Z-200413T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service BLACKSBURG VA
630 AM EDT Mon Apr 13 2020

The National Weather Service in BLACKSBURG has extended the

* Flash Flood Warning for...
  Northwestern Smyth County in southwestern Virginia...

* Until 1030 AM EDT.

* At 623 AM EDT, emergency management reported flooding in the 
  western part of the county, especially in the Saltville area. Up 
  to three inches fell across this area since midnight. Flash 
  flooding is already occurring. Flooding is particularly severe in 
  the Saltville area.

  HAZARD...Flash flooding caused by heavy rain and runoff from 
           earlier heavy rainfall.

  SOURCE...Emergency management.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Saltville...
  Chilhowie...
  Quarry...
  Allison Gap...
  Broadford...
  and Adwolf.

Excessive rainfall over the warned area will cause mud slides near
steep terrain. The mud slide can consist of rock, mud, vegetation and
other loose materials.

This includes the following streams and drainages...
Laurel Springs Creek, Beaver Creek, North Fork Holston River,
Robertson Branch and Tattle Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, to the National Weather Service
by calling toll free at 1...8 6 6...2 1 5...4 3 2 4. Reports and
pictures can also be shared on the National Weather Service
Blacksburg Facebook page and on Twitter.

&&

LAT...LON 3696 8170 3694 8168 3693 8169 3693 8168
      3680 8157 3675 8168 3680 8170 3692 8183

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...Little Additional Rainfall.

$$

RAB
619 
WGUS71 KRNK 131432
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
1032 AM EDT Mon Apr 13 2020

VAC173-131441-
/O.EXP.KRNK.FF.W.0006.000000T0000Z-200413T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Smyth VA-
1032 AM EDT Mon Apr 13 2020

...THE FLASH FLOOD WARNING FOR 
NORTHWESTERN SMYTH COUNTY HAS EXPIRED...

The heavy rain has ended and flood waters are receding. While flash 
flooding is no longer expected to pose a threat, please continue to 
heed any remaining road closures by law enforcement or public 
officials.

LAT...LON 3696 8170 3694 8168 3693 8169 3693 8168
      3680 8157 3675 8168 3680 8170 3692 8183

$$

RAB

What forecasters said that day

The local office's own words before this flash flood warning 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 flash flood warning went out at Apr 12, 9:52 PM EDT, 3 hours 40 minutes earlier.

Area forecast discussion, Apr 12, 9:52 PM EDT, 3 hours 40 minutes before
Area Forecast Discussion
National Weather Service Blacksburg VA
952 PM EDT Sun Apr 12 2020

.SYNOPSIS...
A strong spring storm system will impact our weather tonight
and Monday producing strong gusty winds, heavy rain, and the
potential for strong to severe thunderstorms. Cooler weather
returns for midweek as a series of weak cold fronts drop
southeast across the area.

&&

.NEAR TERM /THROUGH MONDAY/...
As of 945 PM EDT Sunday...

Rain has now overspread most of the forecast forecast area this
evening. Main line of storms and heaviest rain appears to
arrive a little earlier than originally thought, possibly
knocking on the western forecast area border as early as 2 AM -
3 AM.

Temperatures are still rather cool along and west of the Blue
Ridge, with areas in the lower to mid 50s. Upper 50s to mid 60s
east of the Blue Ridge. Still expecting to see temperatures and
dew points continue to slowly rise overnight with strong warm
southerly flow continues to advect warmer temperatures/moisture
northward. Will also begin to see an increase in non-
thunderstorm winds as the low- level jet begins to strengthen
and the pressure gradient tighten as the low pressure to our
west deepens this evening. Still a big question on how much
instability can build in tonight ahead of the front, if any.
More instability will of course heighten the chance of seeing
severe storms. Regardless of instability, still will see a line
of storms/heavy rain push through the CWA. This is a dynamics
driven system and it will not take a very deep storm to tap into
the very strong low- level jet to mix strong winds down to the
surface.

Forecast as of 300 PM EDT Sunday...

What you see out the window at the moment is the proverbial
calm before the storm. There is lots of dynamic energy coming
together in the Nations mid-section, but for the moment our
forecast area is relatively calm. Clouds are streaming into the
area from the southwest along with an increasing coverage of
showers, but the main crux of the activity is not expected until
the overnight period and into early Monday.

As we transition through the evening. The upper flow is
forecast to back ahead of a strong shortwave trough to our
southwest, this wave moving east out of the Ark-La-Tex region
and phasing with a cold energetic northern stream long wave
trough which is sinking southeast from the northern Plains. The
phasing of these two dynamic upper level features is expected to
result in strong surface cyclogenesis, the surface low starting
at 994 mb over Oklahoma this evening and deepening to a 980 mb
low or possibly lower as it reaches the Ohio Valley and Great
Lakes by daybreak Monday. This rapid pressure drop will sharpen
the surface baroclinic zone with the associated cold front
accelerating east across the lower Ohio and TN valleys, and the
Deep South, then crossing the Mid-Atlantic States Monday
morning. The severe thunderstorm potential from the Storm
Prediction Center paints a grim outlook for the southeast U.S
over the next 24 hours, one which will contain life threatening
damaging winds and tornadoes.

For our forecast area there is a myriad of weather threats to
contend with over the next 24 hours. Starting with rainfall,
there is a high likelihood for at least one inch of rain
areawide, and upwards of 2 to 3 inches of rain along the Blue
Ridge Parkway, with the higher amounts favored along the
southern Blue Ridge from Floyd/Patrick counties of VA into the
NC mountains. It is this area where we have highlighted the
greatest risk for flash flooding.

Upslope flow and PWATs exceeding 1.5 inches which is 2-3 Standard
deviations above normal, lend to heavy rain at times across the
southern Appalachians/Blue Ridge. Model blended QPF showing 3+
inches of rain from NC mountains up the Blue Ridge to almost
Roanoke. Per moderate risk of excessive rainfall and flash
flood guidance running lower in the mountains with slower spring
greenup, this easily justifies a Flash Flood Watch for the NC
mtns/foothills to Floyd/Patrick County, VA. Additional notes
about river flooding concerns are highlighted within the hydro
section of this Area Forecast Discussion.

Moving on to the Wind and Thunderstorm Threat.  A 45-60kt low
level jet works in from the southwest/south this evening
enhancing the upslope across the southern Appalachians, and the
low level jet ramps up even more overnight ahead of the surface
cold front. Forecast soundings suggest there will be limited
mixing of these stronger winds initially, but ridges above 4000
ft could easily feel the affects of the LLJ where gusts could
approach 50 kts. At the same time showers with deeper convection
will also be increasing across the area. These showers will
have the potential to mix down some of this higher momentum air
even into the lower elevations. As such, have issued a wind
advisory for the entire forecast area beginning 02Z/10PM this
evening.

The passage of a line of thunderstorms will likely lead to the
strongest wind gusts late tonight and early Monday. The
thunderstorms associated with this line are expected to have a
high potential to produce severe weather due to the dynamic
nature of the atmosphere. These storms will be embedded within
an environment characterized by 1000-1500 J/kg MLCAPE along with
50+ kt effective bulk shear and large 0-1 km hodographs. This
environment will promote an ongoing risk of embedded supercells
and bowing segments capable of damaging wind and tornadoes. The
severe threat will persist until the passage of the surface
front which is expected to clear roughly a Bluefield WV to Boone
NC line by 12z/8AM, Lewisburg/Blacksburg/Roanoke/Mt Airy
corridor around 13Z/9AM, then east of a Lynchburg-Danville line
around 10AM...give or take an hour on the timing. These storms
are expected to be moving between 50-60kts...so the passage will
occur in rapid fashion. That said, even though the crux of the
activity comes through in the morning, embedded deep convection
overnight may mix down some isolated pockets of strong wind
yielding a need for warnings, and the post frontal winds
immediately following the actual line of severe storms may also
promote gusts capable of damage, and thus the reasoning for the
wind advisory remaining in effect until 20z/4PM.

After the front passes, skies are expected to clear rapidly
yielding mostly sunny skies by mid afternoon. The cold air
behind the front is lagging, so there will be a spike in the
temperature once the clouds depart Monday afternoon with highs
potentially testing 80 degrees across the Piedmont. Temperatures
will eventually succumb to the post frontal cold air advection,
but not until Monday night.

&&

.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/...
As of 300 PM EDT Sunday...

Weak high pressure should build overhead during Monday night, which
will set up a chilly night across the Mid Atlantic. Tuesday morning
appears quiet, but high pressure should give way to an approaching
cold front by late Tuesday. Rain chances should increase on Tuesday
night, and confidence is increasing that the rain will change to
snow showers in the higher elevations. Some flurries may even spread
across a good portion of areas along and west of the Blue Ridge by
Wednesday morning as temperatures dip close to freezing. However, it
appears that most of the Piedmont will remain with just cold rain.

Any appreciable snowfall accumulations from Tuesday night into
Wednesday morning seem to be confined to the higher elevations
across southeast West Virginia and the Alleghany Highlands of
Virginia. There are a few models that push the accumulating snowfall
further eastward toward the I-81 corridor, but it is too uncertain
at this time due to the moisture moving away from the mountains by
midday. Drier air will arrive by Wednesday evening as high pressure
noses over North Carolina. A weak frontal boundary could cross over
West Virginia by Wednesday night, which may allow a slight chance
of light snow showers for the highest peaks of Greenbrier
County.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
As of 300 PM EDT Saturday...

This forecast period starts with zonal flow aloft and high pressure
building in at the surface. This keeps the weather dry until later
Friday. By Friday, guidance becomes divergent in agreement, leading
to a more ensemble heavy forecast. A shortwave trough passes through
the area later Friday into Saturday, bringing the opportunity for
rainfall into saturday evening. A brief window of dry weather
arrives Saturday into sunday with the return of high pressure before
another shortwave trough passes the second part of Sunday.

Thanks to mostly zonal flow throughout and no foreseeable
significant systems, temperatures look fairly seasonal with highs
each day in the 50-60s and lows in the 40-50s.

&&

.AVIATION /02Z MONDAY THROUGH FRIDAY/...
As of 730 PM EDT Sunday...

Deteriorating flight conditions occurring this evening as rain
and rain showers overspread the forecast area. Ceilings are
lowering to MVFR from south to north and eventually into the
IFR category overnight.

Rain is expected to become heavy at times overnight with an
increasing potential for thunderstorms. Forecast sounding
indicated elevated instability overnight, becoming surface
based by daybreak Monday when a solid line of strong to severe
thunderstorms cross the area associated with a strong cold
front. A 50-65kt LLJ is being forecast by the models, thus
increasing the potential for LLWS until after the frontal
passage. Post frontal, southwest to west winds will also be
quited gusty, continuing into Monday afternoon even though
flight conditions with respect to cloud bases and visibility
will be improving. Models suggest rapid improvement of
cigs/vsbys by Noon Monday.

Forecast confidence moderate to high.

Extended Aviation Discussion...

Turbulent mixing from the wind will gradually diminish Monday
night before ending Tuesday. Clearing, on the other hand, is
expected to be temporary. Lowering cloud bases and potential for
sub-VFR ceilings will spread back into the area from an area of
low pressure that forms along the southeast coast Tuesday-
Wednesday.

Should be VFR Thursday with high pressure arriving from the
TN/OH Valley.

&&

.HYDROLOGY...
As of 330 PM EDT Sunday...

Incoming hydro event looks to be roughly 12-18-hour duration from
around 21Z/5PM this evening through 14Z/10AM Monday, with
heaviest of the rain occuring late tonight and up until the
passage of the cold front Monday morning. Models are generally
consistent in producing 1 to 3 inches of QPF. Highest amounts
look to be focused along the southern and central Blue Ridge.
Question is will this be enough to cause flash flooding and/or
river flooding?

Flash flood guidance in 6 hours shows 2-2.5 inches for flash
flooding and given some heavy rains with higher pwats, plus
convective elements, feel the need for the flash flood watch instead
of a flood watch.

However, this does not mean river flooding is not out of the
question.

Current forecasts for the rivers keeps them below flood stage, with
Alderson along the Greenbrier River coming close to minor flood
stage Monday night.

Looking at Ensemble River forecasts from the GEFS and NAEFS show
potential for minor to moderate flooding along the upper Roanoke/New
and Greenbrier Rivers as well as the upper James. This of course
does not include smaller river/streams and will re-evaluate need to
expand the flash flood watch northward or just have a flood watch
for rivers/streams due the runoff.

Soil moisture running about 40-60 percent above normal across the
mountains, and with less vegetation/greenup, runoff will be
increased, mainly in the mountains. Will have to watch for urban
flooding as well.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...Wind Advisory until 4 PM EDT Monday for VAZ007-009>020-022>024-
     032>035-043>047-058-059.
     Flash Flood Watch until 9 AM EDT Monday for VAZ015>017-032.
NC...Wind Advisory until 4 PM EDT Monday for NCZ001>006-018>020.
     Flash Flood Watch until 9 AM EDT Monday for NCZ001>003-018-019.
WV...Wind Advisory until 4 PM EDT Monday for WVZ042>044-507-508.

&&

SYNOPSIS...PM
NEAR TERM...BMG/PM
SHORT TERM...PW
LONG TERM...RR
AVIATION...BMG/PM
HYDROLOGY...PM/WP
Hazardous weather outlook, Apr 12, 2:36 PM EDT, 10 hours 56 minutes before
Hazardous Weather Outlook
National Weather Service Blacksburg VA
236 PM EDT Sun Apr 12 2020

VAZ007-009>014-018>020-022>024-WVZ042>044-507-508-131845-
Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Montgomery-Craig-
Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-Mercer-Summers-Monroe-
Eastern Greenbrier-Western Greenbrier-
236 PM EDT Sun Apr 12 2020

...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 4 PM EDT
MONDAY...

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

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.

In addition, severe thunderstorms are possible, which may produce
damaging winds and heavy rain that could lead to localized flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.

In addition, severe thunderstorms are possible, which may produce
damaging winds and heavy rain that could lead to localized flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed for tonight into Monday morning.

NCZ001>003-018-019-VAZ015>017-032-131845-
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Grayson-Carroll-Floyd-Patrick-
236 PM EDT Sun Apr 12 2020

...FLASH FLOOD WATCH IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
MONDAY MORNING...
...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 4 PM EDT
MONDAY...

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

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Wind Advisory.

In addition, severe thunderstorms are possible, which may produce
damaging winds.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Wind Advisory.

In addition, severe thunderstorms are possible, which may produce
damaging winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed for tonight into Monday morning.

NCZ004>006-020-VAZ033>035-043>047-058-059-131845-
Stokes-Rockingham-Caswell-Yadkin-Franklin-Bedford-Amherst-Henry-
Pittsylvania-Campbell-Appomattox-Buckingham-Halifax-Charlotte-
236 PM EDT Sun Apr 12 2020

...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 4 PM EDT
MONDAY...

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

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.

In addition, severe thunderstorms are possible, which may produce
large hail, damaging winds, isolated tornadoes, and heavy rain that
could lead to localized flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.

In addition, severe thunderstorms are likely, which may produce
large hail, damaging winds, isolated tornadoes, and heavy rain that
could lead to localized flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed for tonight into Monday.

PW

In the hours before

Special weather statement, Apr 12, 11:59 PM EDT, 1 hour 33 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
1159 PM EDT Sun Apr 12 2020

NCZ003-VAZ016-017-032-130430-
Surry-Patrick-Floyd-Carroll-
1159 PM EDT Sun Apr 12 2020

...A LINE OF SHOWERS WILL AFFECT CENTRAL SURRY...SOUTH CENTRAL
FLOYD...SOUTHEASTERN CARROLL AND WESTERN PATRICK COUNTIES...

At 1158 PM EDT, radar indicated showers were located along a line
extending from near Laurel Fork to Toast to near Burch. Movement was
northeast at 50 mph.

Winds in excess of 40 mph and rainfall rates of 2 to 4 inches per
hour are possible with these showers. The showers could intensify to
thunderstorms.

Locations impacted include...
Mount Airy...
Elkin...
Fairview...
Flat Rock...
Dobson...
Floyd...
and Ararat.

Do not drive your vehicle through flooded roadways.

LAT...LON 3627 8087 3645 8072 3670 8061 3701 8027
      3677 8033 3644 8053 3624 8087
TIME...MOT...LOC 0358Z 216DEG 44KT 3668 8055 3649 8064 3632 8078

DS
Special weather statement, Apr 13, 12:24 AM EDT, 1 hour 8 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
1224 AM EDT Mon Apr 13 2020

VAZ017-032-033-043-130500-
Henry-Franklin-Patrick-Floyd-
1224 AM EDT Mon Apr 13 2020

...A LINE OF STRONG SHOWERS AND A FEW THUNDERSTORMS WILL AFFECT
CENTRAL FLOYD...NORTHWESTERN HENRY...PATRICK AND SOUTHWESTERN
FRANKLIN COUNTIES...

At 1223 AM EDT, radar indicated strong showers and a few
thunderstorms located along a line extending from Rocky Knob Summit
to near Meadows Of Dan to near Woodville. Movement was northeast at
45 mph.

Winds in excess of 40 mph and locally heavy rain of 2 to 4 inches
per hour are possible with these storms.

Locations impacted include...
Stuart...
Ferrum...
Woolwine...
Endicott...
Critz...
Mabry Mill...
and Philpott Dam.

Do not drive your vehicle through flooded roadways.

LAT...LON 3655 8046 3665 8040 3683 8042 3705 8003
      3688 7994 3663 8011 3655 8039
TIME...MOT...LOC 0423Z 239DEG 39KT 3682 8037 3669 8034 3653 8045

DS
Special weather statement, Apr 13, 1:04 AM EDT, 28 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
104 AM EDT Mon Apr 13 2020

NCZ004-VAZ032>034-043-130530-
Stokes-Henry-Franklin-Patrick-Bedford-
104 AM EDT Mon Apr 13 2020

...A LINE OF STRONG SHOWERS AND A FEW THUNDERSTORMS WILL AFFECT
CENTRAL STOKES...HENRY...CENTRAL BEDFORD...EASTERN PATRICK AND
FRANKLIN COUNTIES AND THE CITY OF MARTINSVILLE...

At 102 AM EDT, radar indicated strong showers and a few
thunderstorms located along a line extending from near Northwest
Smith Mountain Lake to Philpott Dam to King. Movement was northeast
at 75 mph.

Winds in excess of 40 mph and locally heavy rainfall with rates
around 2 to 4 inches per hour are possible with these storms.

Locations impacted include...
Martinsville...
Bedford...
Rocky Mount...
Danbury...
Ferrum...
Big Island...
and Moneta.

Do not drive your vehicle through flooded roadways.

LAT...LON 3626 8044 3675 8019 3718 7988 3755 7937
      3751 7933 3663 7984 3654 7996 3654 8002
      3649 8003 3626 8035
TIME...MOT...LOC 0502Z 221DEG 66KT 3717 7981 3679 8006 3631 8035

DS
Special weather statement, Apr 13, 1:11 AM EDT, 21 minutes before
Special Weather Statement
National Weather Service BLACKSBURG VA
111 AM EDT Mon Apr 13 2020

NCZ002-003-019-VAZ015-016-130530-
Surry-Wilkes-Alleghany-Grayson-Carroll-
111 AM EDT Mon Apr 13 2020

...A SHOWER WILL AFFECT EASTERN ALLEGHANY...NORTHWESTERN SURRY AND
NORTH CENTRAL WILKES COUNTIES IN NORTHWESTERN NORTH CAROLINA...SOUTH
CENTRAL CARROLL AND SOUTHEASTERN GRAYSON COUNTIES IN SOUTHWESTERN
VIRGINIA...

At 110 AM EDT, a shower was located over Doughton Park, or near
Sparta, moving northeast at 75 mph.

Winds in excess of 40 mph and rainfall rates around 2 to 4 inches
per hour are possible with this shower. The shower may intensify to
a thunderstorm.

Locations impacted include...
Sparta...
Ennice...
Stone Mountain State Park...
Baywood...
Whitehead...
Abshers...
and Lambsburg.

Do not drive your vehicle through flooded roadways.

LAT...LON 3633 8116 3639 8122 3663 8106 3660 8072
TIME...MOT...LOC 0510Z 219DEG 67KT 3641 8113

DS
Local storm report, Apr 13, 1:15 AM EDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
115 AM EDT MON APR 13 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1054 AM     TSTM WND DMG     1 SSE NORTH WILKESBORO  36.15N 81.13W
04/12/2020                   WILKES             NC   911 CALL CENTER

            LARGE TREE DOWN IN THE 900 BLOCK OF OLD US
            HIGHWAY 421. TIME ESTIMATED FROM RADAR.

&&

VFJ
Local storm report, Apr 13, 1:20 AM EDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
120 AM EDT MON APR 13 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 PM     TSTM WND DMG     3 NNW BOOMER            36.10N 81.28W
04/12/2020                   WILKES             NC   911 CALL CENTER

            LARGE TREE DOWN AT INTERSECTION OF WEST NC
            HIGHWAY 268 AND BOOMER ROAD. TIME ESTIMATED
            FROM RADAR.

&&

VFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 11:50 PM EDTAreal Flood AdvisoryRNKCarroll, Floyd, Grayson, Patrick, City of Galax12 hr
Apr 12, 11:59 PM EDTSpecial Weather StatementRNKFloyd31 min
Apr 13, 12:18 AM EDTAreal Flood AdvisoryRNKGrayson12 hr
Apr 13, 12:24 AM EDTSpecial Weather StatementRNKPatrick36 min
Apr 13, 12:44 AM EDTAreal Flood AdvisoryRNKBland, Giles, Montgomery, Pulaski, Smyth, Tazewell and 2 more12 hr
Apr 13, 1:04 AM EDTSpecial Weather StatementRNKBedford, Franklin, Henry, City of Martinsville26 min
Apr 13, 1:33 AM EDTSpecial Weather StatementRNKAmherst, Bedford, Henry, City of Lynchburg, City of Martinsville27 min
Apr 13, 1:39 AM EDTSpecial Weather StatementRNKMontgomery, Patrick, City of Radford36 min
Apr 13, 2:03 AM EDTSpecial Weather StatementRNKAmherst, City of Lynchburg27 min
Apr 13, 2:14 AM EDTAreal Flood AdvisoryRNKAmherst, Appomattox, Bedford, Botetourt, Craig, Franklin and 7 more12 hr
Apr 13, 2:33 AM EDTSpecial Weather StatementRNKCampbell27 min
Apr 13, 2:34 AM EDTSpecial Weather StatementRNKFloyd26 min
Apr 13, 2:42 AM EDTFlash Flood WarningRNKCarroll, Floyd, Franklin, Patrick6 hr
Apr 13, 2:48 AM EDTSevere Thunderstorm WarningRNKCarroll, Floyd, Patrick27 min
Apr 13, 3:02 AM EDTSpecial Weather StatementRNKBuckingham28 min
Apr 13, 3:47 AM EDTFlash Flood WarningRNKCarroll, Floyd, Grayson, Montgomery, Pulaski, Roanoke and 5 more6 hr
Apr 13, 4:00 AM EDTSpecial Weather StatementRNKPatrick15 min
Apr 13, 4:35 AM EDTSevere Thunderstorm WarningRNKBedford, Campbell, Franklin, Henry, Patrick, Pittsylvania and 1 more55 min
Apr 13, 5:01 AM EDTTornado WarningRNKFranklin, Henry, Pittsylvania, City of Martinsville29 min
Apr 13, 5:16 AM EDTFlash Flood WarningRNKTazewell3 hr
Apr 13, 5:19 AM EDTTornado WarningRNKHenry, Pittsylvania26 min
Apr 13, 5:25 AM EDTFlash Flood WarningRNKBedford, Botetourt, Floyd, Franklin, Rockbridge3 hr
Apr 13, 5:30 AM EDTSevere Thunderstorm WarningRNKAppomattox, Campbell, Charlotte, Halifax, Pittsylvania, City of Danville60 min
Apr 13, 5:36 AM EDTTornado WarningRNKPittsylvania, City of Danville24 min
Apr 13, 5:48 AM EDTSevere Thunderstorm WarningRNKBuckingham57 min
Apr 13, 5:56 AM EDTTornado WarningRNKCharlotte, Halifax, Pittsylvania34 min
Apr 13, 6:02 AM EDTFlash Flood WarningRNKBedford, Franklin, Henry, Patrick, City of Lynchburg, City of Martinsville4 hr
Apr 13, 6:21 AM EDTFlash Flood WarningRNKAmherst, Rockbridge, City of Buena Vista, City of Lexington4 hr
Apr 13, 6:25 AM EDTSevere Thunderstorm WarningRNKCharlotte, Halifax50 min
Apr 13, 7:01 AM EDTRiver Flood WarningRNKTazewell12 hr
Apr 13, 8:35 AM EDTAreal Flood WarningRNKBedford, Botetourt, Franklin12 hr
Apr 13, 8:47 AM EDTAreal Flood WarningRNKCarroll, Floyd, Patrick6 hr
Apr 13, 9:02 AM EDTAreal Flood WarningRNKGiles15 hr
Apr 13, 9:30 AM EDTRiver Flood WarningRNKRoanoke, City of Roanoke, City of Salem35 hr
Apr 13, 9:30 AM EDTRiver Flood WarningRNKPittsylvania24 hr
Apr 13, 9:46 AM EDTRiver Flood WarningRNKSmyth18 hr
Apr 13, 9:55 AM EDTAreal Flood WarningRNKMontgomery, Pulaski, Roanoke, Wythe, City of Radford6 hr
Apr 13, 10:12 AM EDTAreal Flood WarningRNKRockbridge, City of Buena Vista, City of Lexington5 hr
Apr 13, 10:37 AM EDTAreal Flood WarningRNKSmyth5 hr
Apr 13, 11:15 AM EDTSpecial Weather StatementRNKAmherst, Bedford, Campbell, City of Buena Vista, City of Lexington, City of Lynchburg30 min
Apr 13, 11:40 AM EDTRiver Flood WarningRNKCarroll, Grayson, City of Galax9 hr
Apr 13, 11:40 AM EDTRiver Flood WarningRNKPulaski, Wythe39 hr
Apr 13, 11:40 AM EDTRiver Flood WarningRNKMontgomery, Pulaski, City of Radford43 hr

Nearby

Flash Flood Warnings in Virginia, 2020Every flash flood warning 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.