Flash Flood Warning 56, NWS Blacksburg, VA

412 
WGUS71 KRNK 140152
FFSRNK

Flash Flood Statement
National Weather Service Blacksburg VA
952 PM EDT Thu Aug 13 2020

VAC121-155-750-140700-
/O.CON.KRNK.FF.W.0056.000000T0000Z-200814T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery VA-Pulaski VA-City of Radford VA-
952 PM EDT Thu Aug 13 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 3 AM EDT FRIDAY FOR 
SOUTHWESTERN MONTGOMERY, EAST CENTRAL PULASKI COUNTIES, AND THE CITY 
OF RADFORD...

At 952 PM EDT, Doppler radar and automated rain gauges indicated 
that rain and thunderstorms continue to produce heavy rain between 
Radford, Pulaski, Draper, and Childress. Between 1.5 and 2 inches of 
rain have already fallen in these areas in less than an hour. Flash 
flooding is imminent.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar and automated gauges.

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 flash flooding include...
  Radford, Claytor Dam, Fairlawn and Childress.

This includes the following streams and drainages...
  Mill Creek, Connellys Run, Meadow Creek, Crab Creek, New River and 
  Little River.

Additional rainfall amounts of 1 to 1.5 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.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

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 3711 8062 3712 8060 3713 8059 3714 8057
      3714 8056 3715 8055 3714 8053 3715 8052
      3715 8051 3714 8051 3713 8051 3707 8050
      3706 8061

FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR 

$$

RAB

783 
WGUS71 KRNK 140410
FFSRNK

Flash Flood Statement
National Weather Service Blacksburg VA
1210 AM EDT Fri Aug 14 2020

VAC121-155-750-140420-
/O.CAN.KRNK.FF.W.0056.000000T0000Z-200814T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery VA-Pulaski VA-City of Radford VA-
1210 AM EDT Fri Aug 14 2020

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN MONTGOMERY AND 
EAST CENTRAL PULASKI COUNTIES AND THE CITY OF RADFORD...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

LAT...LON 3711 8062 3712 8060 3713 8059 3714 8057
      3714 8056 3715 8055 3714 8053 3715 8052
      3715 8051 3714 8051 3713 8051 3707 8050
      3706 8061

$$

RAB

Area Forecast Discussion
National Weather Service Blacksburg VA
809 PM EDT Thu Aug 13 2020

.SYNOPSIS...
A weak upper level trough to our west and surface boundary
nearby will allow for better coverage of showers and storms
over the next several days with heavy rainfall possible.

&&

.NEAR TERM /THROUGH FRIDAY/...
As of 745 PM EDT Thursday

Storms are forming sporadically across the are, with a few
producing lightning, but none are approaching severe
thunderstorm intensity. These storms are also not as stationary
as they have been the past couple days, things are propagating
fairly well. Outside of a broad area of showers for a few hours
over Watauga/Wilkes, no particular location has been targeted by
heavy rain or seen any training. A lot of the more intense rain
rates and lightning has been showing up outside of our CWA.

Today's cloud cover kept us cooler than expected, so brought
temps down a few degrees, but no more than a small adjustment to
overnight minimums was made.

From 1245 PM EDT Thursday...

Forecast to reflect numerous showers/storms this afternoon,
though convection has been slower to develop due to extensive
cloud cover this morning, especially east of the mountains.
Better coverage early this afternoon lies along the low level
convergence boundary from the Blue Ridge into SE WV, with a
secondary area of showers across the foothills east of the
Shenandoah Valley.

Latest HRRR reflects this fairly well and through mid afternoon
keeps the higher concentration of storms from the NC
mountains/foothills, north into the New River and Upper TN
Valley, with another area along/north of U.S. 60 from Hot
Springs to Buckingham VA. Will likely see more develop is a
shotgun pattern again after 4pm elsewhere. Although the flash
flood threat is overall isolated, no plans to change the current
watch.

As we head to this evening appears convection wanes somewhat but
with upper trough to our west and higher pwats and still
semblance of easterly fetch, will keep threat showers/few
thunderstorms to well after midnight where best chance will be
along the Blue Ridge.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
As of 200 PM EDT Thursday...

Showers and thunderstorms will remain in the forecast through
the weekend, all thanks to a weak upper level disturbance
drifting east from the MS Valley within a moist and unstable
airmass. Thunderstorm activity will be mainly diurnally driven
though with highly moist airmass and frontal boundary
showers/few storms could occur late at night and early mornings.
Slow storm motions coupled with very high PWAT values (i.e.
1.7" to 2") will allow for isolated flooding/flash flooding
threat through the weekend, so additional flash flood watches
may be required. The flooding threat will become increasingly
problematic Saturday/Sunday after already seeing several days of
heavy rainfall. Not expecting much in the way of severe, but
some of the stronger storms may produce gusty winds.

Will plenty of cloud cover and showers/thunderstorms expected,
high temperatures will remain at or a few degrees below normal,
with muggy overnight lows.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
As of 200 PM EDT Thursday...

Eastern U.S. trough in place this period with temperatures at or
below normal. Front exits the area by Tuesday-Wednesday but am
hesitant to go completely dry with axis of trough still just
west of us and southwest flow aloft.

&&

.AVIATION /00Z FRIDAY THROUGH TUESDAY/...
As of 800 PM EDT Thursday...

Sky conditions will be very black and white this evening, with
pockets of clear sky being interrupted by low ceilings and
showers/thunderstorms. High moisture content in the atmosphere
will keep ceilings MVFR or IFR much of the night, and
visibilities in the mountains (BLF/LWB and perhaps BCB) will
drop to 2 or 3SM in the morning hours from fog. Once the sun
comes up, clouds and fog will mix out and conditions will move
back in the direction of VFR before scattered storms begin to
fire up again in the afternoon.

Winds overall will be under 5kts
and either variable or east/southeast.

Confidence in ceilings... Moderate to high
Confidence in visibilities... Moderate
Confidence in weather conditions... High

Extended Aviation Discussion...

Shower/storm coverage will stay up Friday afternoon and
Saturday. Somewhat of a wedge Sunday with threat of showers may
keep ceilings down, the front moves across early next week with
mainly VFR outside any convection.

&&

.HYDROLOGY...
As of 340 AM EDT Thursday...

Precipitable water values of 1.5 to 2 inches and weak flow
aloft will increase flash flood threat especially
urban/mountainous terrain today. Based on yesterday's rainfall
of 2-3 inches and forecast rainfall amounts for today, flash
flood threat is greatest from Bluefield WV, across the Mountain
Empire of southwest Virginia and into the North Carolina High
Country. Another area of high concern is the southern Shenandoah
Valley to the Hill City of Lynchburg.

Across southeast West Virginia, Southside Virginia and the
northwestern North Carolina foothills and piedmont, antecedent
conditions and spotty nature of storm yesterday will limit the
chances for flooding.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...Flash Flood Watch until midnight EDT tonight for VAZ007-
     009>020-022>024-032>035-045>047-059.
NC...Flash Flood Watch until midnight EDT tonight for NCZ001>003-
     018-019.
WV...Flash Flood Watch until midnight EDT tonight for WVZ042.

&&

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

Hazardous Weather Outlook
National Weather Service Blacksburg VA
210 PM EDT Thu Aug 13 2020

NCZ001>003-018-019-VAZ007-009>020-022>024-032>035-045>047-059-WVZ042-
141815-
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Tazewell-Smyth-Bland-Giles-
Wythe-Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-Alleghany VA-
Bath-Roanoke-Botetourt-Rockbridge-Patrick-Franklin-Bedford-Amherst-
Campbell-Appomattox-Buckingham-Charlotte-Mercer-
210 PM EDT Thu Aug 13 2020

...FLASH FLOOD WATCH IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

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.

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

   Flash Flood Watch.

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

Scattered to numerous thunderstorms are possible each day through
the weekend and could lead to flash flooding in urban areas and
flooding of creeks and streams.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report heavy rain and flooding.

NCZ004>006-020-VAZ043-044-058-WVZ043-044-507-508-141815-
Stokes-Rockingham-Caswell-Yadkin-Henry-Pittsylvania-Halifax-Summers-
Monroe-Eastern Greenbrier-Western Greenbrier-
210 PM EDT Thu Aug 13 2020

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

.DAY ONE...This afternoon and tonight.

Localized flooding is possible due to heavy rainfall through this
evening.

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

Scattered to numerous thunderstorms are possible each day through
the weekend and could lead to flash flooding in urban areas and
flooding of creeks and streams.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report heavy rain and flooding.

Special Weather Statement
National Weather Service BLACKSBURG VA
259 PM EDT Thu Aug 13 2020

NCZ001-002-VAZ015-131930-
Ashe-Alleghany-Grayson-
259 PM EDT Thu Aug 13 2020

...A STRONG THUNDERSTORM WILL AFFECT
NORTHWESTERN ALLEGHANY...NORTHEASTERN ASHE COUNTIES IN NORTHWESTERN
NORTH CAROLINA AND CENTRAL GRAYSON COUNTIES IN SOUTHWESTERN
VIRGINIA...

At 258 PM EDT, a strong thunderstorm was located over Mouth Of
Wilson, moving northeast at 10 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Independence...
Mouth Of Wilson...
Volney...
Rugby...
Bridle Creek...
Stratford...
and Grassy Creek.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm 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 3676 8127 3676 8124 3656 8107 3646 8136
      3661 8148
TIME...MOT...LOC 1858Z 236DEG 9KT 3658 8135

RR

Special Weather Statement
National Weather Service BLACKSBURG VA
259 PM EDT Thu Aug 13 2020

VAZ010-012-131930-
Bland-Wythe-
259 PM EDT Thu Aug 13 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL BLAND AND
NORTHWESTERN WYTHE COUNTIES...

At 259 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Kimberling to near Ceres. Movement
was southeast at 5 mph.

Pea size hail is possible with these storms.

Locations impacted include...
Bland...
Bastian...
Rocky Gap...
Hicksville...
Kimberling...
and Suiter.

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

LAT...LON 3707 8134 3709 8127 3711 8126 3712 8126
      3724 8109 3717 8096 3698 8125 3705 8136
TIME...MOT...LOC 1859Z 305DEG 5KT 3719 8106 3705 8128

DS

Special Weather Statement
National Weather Service BLACKSBURG VA
334 PM EDT Thu Aug 13 2020

VAZ010-012-132015-
Bland-Wythe-
334 PM EDT Thu Aug 13 2020

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT
EASTERN BLAND AND WYTHE COUNTIES...

At 334 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Rocky Gap to near Favonia. Movement
was northeast at 55 mph.

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

Locations impacted include...
Wytheville...
Bland...
Rural Retreat...
Max Meadows...
Rocky Gap...
Bastian...
and Mechanicsburg.

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

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3725 8113 3720 8092 3718 8089 3719 8087
      3718 8086 3717 8088 3715 8086 3711 8093
      3703 8089 3700 8086 3683 8094 3681 8101
      3681 8103 3680 8106 3689 8131
TIME...MOT...LOC 1934Z 206DEG 48KT 3723 8106 3700 8117

RAB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
420 PM EDT THU AUG 13 2020

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

0414 PM     FLASH FLOOD      NORTH WILKESBORO        36.17N 81.14W
08/13/2020                   WILKES             NC   911 CALL CENTER

            2ND STREET BEING BLOCKED OFF FOR DANGEROUS
            FLOWING WATER NEAR THE INTERSECTION WITH NC
            HIGHWAY 115.

&&

 VFJ