Flash Flood Warning 30, NWS Blacksburg, VA

827 
WGUS71 KRNK 050418
FFSRNK

Flash Flood Statement
National Weather Service Blacksburg VA
1218 AM EDT Wed Aug 5 2026

VAC021-197-050428-
/O.CAN.KRNK.FF.W.0030.000000T0000Z-260805T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bland VA-Wythe VA-
1218 AM EDT Wed Aug 5 2026

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN BLAND AND 
NORTHWESTERN WYTHE COUNTIES...

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

&&

LAT...LON 3713 8090 3712 8091 3712 8093 3710 8092
      3695 8104 3693 8124 3704 8122 3718 8109

$$

AS

Area Forecast Discussion
National Weather Service Blacksburg VA
826 PM EDT Tue Aug 4 2026

.WHAT HAS CHANGED...
Aviation Discussion Updated.

Precipitation chances lowered to reflect new model guidance and the
weakening mid-level low.

&&

.KEY MESSAGES...
1) There is a marginal risk of excessive rainfall for Virginia
and the Carolinas today/tonight.

2) Unsettled weather will persist through the rest of this week
with daily chances of showers and thunderstorms.

&&

.DISCUSSION...
KEY MESSAGE 1...There is a marginal risk of excessive
rainfall for Virginia and the Carolinas today/tonight.

A very moist airmass remains in place today with persistent
easterly flow advecting deep moisture into the region. Surface
analysis indicates that a stalled boundary is draped over the
region, in addition to a wave of low pressure that is easily
identifiable in the satellite water vapor imagery. The
concerning factor is the low is nearly stationary which means
steering winds will remain stagnant with little or no geographic
change in the position of the surface front today. As such,
expect persistent formation of showers and a few storms within
the vicinity of the front, with heaviest of the rain today
falling over southern Virginia and into North Carolina. This is
where hi-res CAM guidance continues to pinpoint on the greatest
coverage of heavy rainfall.

12z RNK RAOB shows an increase in Precipitable Water when
compared to yesterday and current RAP analysis continues to
increase these values, with some of the area now closing in on
2 inch values. This will result in very efficient rainfall
which could lead to an increased potential for flash flooding
through late this evening.

Away from the convergent zone near the surface front, not
expecting a lot of shower coverage. However, heating of the day
instability driven showers are still possible but they should
not be as organized as what is expected along the actual surface
front. The Storm Prediction Center has highlighted a small
marginal risk area for strong to severe storms over western
North Carolina...an area closer to the center of the upper low.
Warming surface temperatures in the higher terrain will result
in scattered convective initiation across the southern
Appalachians. As instability peaks and low-level lapse rates
become steep over the next few hours, an isolated wind-damage
threat is expected to develop in the western Carolinas.

By tonight, loss of daytime heating should mitigate any severe
threat, but a localized excessive rain hazard will linger. The
surface front over southern VA should begin to lift north as the
upper low begins to open up and shear out. This should
reconfigure the axis of low level convergence with areas closer
to the US 460/I-64 corridor targeted for the higher qpf
overnight.

KEY MESSAGE 2...Unsettled weather will persist through the rest
of this week with daily chances of showers and thunderstorms.

The upper low over the Mid-Atlantic will shear out and weaken
Wednesday. Meanwhile a large upper level ridge builds over
Bermuda and another upper level trough approaches the Great
Lakes. Wind flow between these two features will maintain a
persistent flow of moisture into the forecast area, enough to
fuel daily showers and thunderstorms, most of which should
coincide with the peak heating of the day favoring the afternoon
and evening hours. We are not expecting anything severe, but a
marginal risk for flash flooding will continue to be a hazard
due to the potential for high rain rates which may lead to
runoff issues.

&&

.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...

Showers and thunderstorms continue this evening and into tonight.
Much of the precipitation has been to the south and east, mostly
effecting KDAN. The scattered nature of these storms means that any
one of the terminals could see a reduction in visibilities as they
move through. Rain chances will gradually lower overnight and into
early tomorrow morning but fog will also likely return for all
airports. Cloud bases will sink considerably to at least 1500 feet
for most of the region with KDAN, KROA, KLYH, and KLWB, possibly
seeing ceilings below 500 feet. IFR/LIFR conditions will take
up most of the night and early Wednesday morning before sunrise.
Once daytime begins, the fog will evaporate and another round
of showers is possible in the afternoon. A mid-level low in the
vicinity is projected to loose strength tomorrow but there will
still be enough warmth and humidity to promote another round of
scattered showers and thunderstorms. Otherwise, the only other
notable change in weather will be a shift of wind from the
south by Wednesday afternoon.

EXTENDED AVIATION OUTLOOK...

While the mid-level storm system in the Mid-Atlantic is expected to
wane, warm and moist air from the south will still be transported to
our region to continue daily chances of showers and thunderstorms
and overnight fog. This weather pattern will likely continue for the
rest of the work week.

&&

.HYDROLOGY...
There is a marginal risk for excessive rainfall the next several
days. Repeated chances of showers and thunderstorms amidst a
moist air mass will persist the remainder of this week.
Not a lot of confidence in the details for any particular
location.

PWAT values expected to remain in the 1.50" to 2.00"
range. High ambient moisture will produce very efficient
rainfall rates which could exceed 2-3 inches per hour. Urban
areas and along mountainous terrain will be particularly
susceptible to flash flooding.

Antecedent soil conditions are gradually turning wetter across
the area, but there are still considerable rainfall deficits
across the Piedmont.

&&

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

&&

DISCUSSION...BMG/PM
AVIATION...CG
HYDROLOGY...BMG/PM

Hazardous Weather Outlook
National Weather Service Blacksburg VA
1056 AM EDT Tue Aug 4 2026

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>044-507-508-051500-
Ashe-Alleghany NC-Surry-Stokes-Rockingham-Caswell-Watauga-Wilkes-
Yadkin-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Montgomery-Grayson-
Carroll-Floyd-Craig-Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-
Patrick-Franklin-Bedford-Amherst-Henry-Pittsylvania-Campbell-
Appomattox-Buckingham-Halifax-Charlotte-Mercer-Summers-Monroe-
Eastern Greenbrier-Western Greenbrier-
1056 AM EDT Tue Aug 4 2026

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...Today and tonight.

Localized heavy rain is possible with isolated flash flooding today
and tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Thunderstorms developing each afternoon and evening may produce
locally heavy rainfall that could cause a risk of flash flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.