Special Weather Statement, NWS Blacksburg, VA

Area Forecast Discussion
National Weather Service Blacksburg VA
624 AM EDT Mon Aug 30 2021

.SYNOPSIS...
Hot and humid weather, along with daily scattered showers and
thunderstorms, will persist through Tuesday. Rain chances
increase significantly by Wednesday into Wednesday night as the
remnants of Ida approach the central Appalachians. In the wake
of Ida, high pressure will build in from the northwest for next
weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 302 AM EDT Monday...

Hot and Humid with scattered showers and thunderstorms today into
tonight.

The center of Hurricane Ida was located near latitude 30.6 North,
longitude 90.8 West this morning. Ida is moving toward the north
near 9 mph, and this general motion will continue today. A faster
northeastward motion is expected to begin by tonight and continue on
Tuesday. Ida will move farther inland over southeastern Louisiana
early this morning and move into southwestern Mississippi later this
morning. Ida is then forecast to move over central and northeastern
Mississippi this afternoon and tonight. See latest NHC advisory for
details.

For our region, areas of low clouds and fog this morning will lift
by late morning. The combination of heating, frontal and outflow
boundaries across the region will generate showers and thunderstorms
especially this afternoon and evening. Shortwave energy rotating
across the upper ridge will help the development of convection. Some
of the storms have the potential for producing localized heavy rain
and damaging winds. Increasing mid clouds ahead of Ida will hinder
severe weather potential keeping CAPEs lower. WAA will keep it quite
hot and humid with high temperatures this afternoon ranging from the
mid 70s in the mountains to the mid 90s in the piedmont. Storms will
slowly diminish this evening into tonight with the loss of solar
heating. Areas of low clouds and fog will form tonight into Tuesday
morning. Low temperatures tonight will drop into the upper 50s in
the mountains to the upper 60s to near 70 degrees in the piedmont.

Moderate confidence in Near Term Forecast.

&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/...
As of 500 AM EDT Monday...

     Remnants of Hurricane Ida to bring heavy rainfall, gusty
winds, and possibly a few tornadoes to the region late Tuesday
through Wednesday...

Ida will be the main focus through this period as the remnants
of such track right through the region late Tuesday through
Wednesday morning. The latest track will bring some of the
maximum impacts of this former major hurricane through our
region. Timing brings the core of the system through the area
Tuesday Night/Wednesday morning exiting to the northeast
Wednesday afternoon. Main concern will be excessive rainfall,
but as with T.S. Floyd just a couple of weeks ago, tornadoes
will also be a threat overnight Tuesday into Wednesday morning.

Outer spiral rain bands associated with Ida should reach the
area Tuesday afternoon. If enough heating and instability is
realized, there may be scattered thunderstorms as well, which
will increase the threat of localized flooding. Given all of the
rainfall during the past couple of days, especially New River
Valley and southeast WV as well as the southern Shenandoah
Valley, flooding concerns will be a greater threat. There will
also be some tornado threat with stronger cells in these outer
spiral bands as shear will be on the increase late Tuesday.
However, the greater threat for tornadoes comes overnight
Tuesday into Wednesday morning when 300-400+ low-level helicity
is indicated tracking across the region in associated with the
core remnants of Hurricane Ida. This is a very poor time for
tornado development synoptically, but it won't really make any
difference when associated with a tropical storm. This will need
to be watched very carefully as the circulation with Ida is much
stronger than that associated with Fred which produced two EF0
tornadoes in our area, even though Ida has tracked across much
more real estate before arriving here than did Fred. This has
been indicated in the SPC outlooks for both Day2 and Day3 and
could be increased to a 5% tornado risk with later outlooks.

A time has gone by, the threat for excessive rainfall has become
a greater concern with the slight eastward shift in the track of
Ida. The core rainfall will likely track very near or just
northwest of the CWA early Wednesday into Wednesday afternoon.
The greatest concern for excessive rainfall will be west of the
Blue Ridge and along the I-64 corridor. Have issued a Flash
Flood Watch in coordination with neighbors for 2-4 inches of
rainfall late Tuesday through early Wednesday with locally 3-5
inches possible, even 6 inches in a few mountainous spots in
the west/northwest. The FFA may need to be expanded further
south and east if the track shifts any further east/south. WPC
expects the heaviest rain to fall just to the west/northwest of
our CWA, but it is right on our border with a MDT threat both
Day2 to our west and Day3 to our north. Most of our CWA is
covered with a SLIGHT west to MRGL east. Look for possible
adjustments with time.

We ran the GTCM and it gave us way too much wind through the
heart of the CWA. As other offices are not using this tool, we
will revert back to a more general wind field, but some gusty
winds late Tuesday/early Wednesday are possible along/near the
Blue Ridge, perhaps 20kts at times.

Rainfall will begin to shift northeast out of the area late
Wednesday, but will carry the FFA through midnight Wednesday in
the event that the slower ECMWF model verifies and heavy
rainfall lingers in the northeastern part of the CWA.

Temperatures Tuesday will still be on the warm side with 80s
west to 90s east, but after that the remainder of the period
should see highs in the 70s and lows in the 60s. No cooling of
significance is expected until beyond this period.

/Confidence in Forecast Parameters/
- High Confidence in Temperatures,
- Moderate to High Confidence in Probabilities of Precipitation,
- Moderate Confidence in Wind Direction and Speed,
- Moderate Confidence in Thunderstorms.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
As of 600 AM EDT Monday...

     Much quieter, drier weather conditions expected in the wake
of Ida Thursday into the Weekend...

Ida quickly scoots out of here Thursday morning into midday. Both
the GFS and Euro tend to agree with this as drier air quickly rushes
in as a large area of Canadian high pressure builds over the Great
Lakes region. As Ida, departs a few residual showers cannot be ruled
out especially over the mountains of the Greenbrier Valley/Alleghany
Highlands thanks to north to northwesterly flow. Shower activity
will shutdown by late Thursday afternoon and evening as direr air
continues to filter in. Breezy conditions will also be in play with
Ida departing north and east and high pressure coming in from the
north and west tightening the gradient.

Lingering showers will dissipate and skies will clear as we head
into Thursday night as high pressure builds closer to the region.
Winds will shutdown by Friday with lowering humidity and mostly
sunny skies to finish out the workweek. Highs will top out in the
mid to upper 70s over the mountains with low to mid 80s out east by
Friday afternoon. Much of the same can be expected Saturday and
Sunday with highs increasing by a degree or two  each afternoon.
Overnight lows will be nice and crisp especially Friday and Saturday
night as temperatures dip into the 50s. Some locations in the
mountains could even bottom out in the mid to upper 40s on both of
those nights.

Our next chance at a shower or thunderstorm arrives by Monday as a
new front dives into the area. Models right now don't seem to keen
on any widespread rain at this point with a continued warming trend
as high pressure sticks around into early next week.

Confidence remains moderate to high in the long term period.

&&

.AVIATION /12Z MONDAY THROUGH FRIDAY/...
As of 625 AM EDT Monday...

Isolated convection in the northern mountains this morning will
increase in coverage this afternoon and tonight. The second concern
for aviation operation is areas of low clouds and fog this morning.
KLWB has a chance for LIFR/IFR fog this morning. KBCB also has a
good chance for LIFR fog after receiving 1.59 inch of rain Sunday.

The combination of heating and low level boundaries will
generate scattered MVFR/IFR showers and thunderstorms this
afternoon and evening. Any convection will taper off this evening
into tonight with the loss of solar heating.

Medium confidence in ceilings,visibilities and winds during taf
period.

Extended Aviation Discussion...

Pockets of low clouds and fog are expected Monday night into
Tuesday morning especially in the river valley. Diurnal showers and
thunderstorms are expected on Tuesday. Tropical moisture and more
widespread rainfall chances arrive late Tuesday into early Wednesday.
The remnants of Hurricane Ida will bring widespread heavy rainfall
to the region, first in the form of spiral bands of locally heavy
rainfall and scattered thunderstorms Tuesday afternoon and evening
transitioning to a more stead moderate to occasionally heavy
rainfall Tuesday night into Wednesday.Much quieter, drier weather
conditions expected in the wake of Ida Thursday into the Weekend.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...Flash Flood Watch from Tuesday afternoon through Wednesday
     evening for VAZ007-009>013-015-016.
NC...None.
WV...Flash Flood Watch from Tuesday afternoon through Wednesday
     evening for WVZ042>044-507-508.

&&

SYNOPSIS...KK
NEAR TERM...KK
SHORT TERM...RAB
LONG TERM...RAB
AVIATION...KK

Hazardous Weather Outlook
National Weather Service Blacksburg VA
439 AM EDT Mon Aug 30 2021

NCZ001>006-018>020-VAZ014-017>020-022>024-032>035-043>047-058-059-
311200-
Ashe-Alleghany NC-Surry-Stokes-Rockingham-Caswell-Watauga-Wilkes-
Yadkin-Montgomery-Floyd-Craig-Alleghany VA-Bath-Roanoke-Botetourt-
Rockbridge-Patrick-Franklin-Bedford-Amherst-Henry-Pittsylvania-
Campbell-Appomattox-Buckingham-Halifax-Charlotte-
439 AM EDT Mon Aug 30 2021

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 thunderstorms will be possible this afternoon and evening.
The main concern will be locally heavy rainfall and localized
flooding or flash flooding.

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

The remnants of Hurricane Ida will be passing through the region late
Tuesday through Wednesday. Widespread heavy rainfall is expected
which will lead to flooding, flash flooding, and eventually larger
main stem river flooding. In addition, gusty winds combined with the
heavy rainfall may bring down some trees and result in scattered
power outages. Finally, a few tornadoes will be possible across the
region as the tightly wound up circulation associated with the
remnants of Ida pass through the area late Tuesday into early
Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed Tuesday afternoon through
Wednesday morning for reports of flooding, wind damage, and possibly
tornadoes. Reports should be submitted by calling 1-866-215-4324,
social media, email at rnk.skywarn@noaa.gov or online at
www.weather.gov/rnk.

VAZ007-009>013-015-016-WVZ042>044-507-508-311200-
Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Grayson-Carroll-Mercer-
Summers-Monroe-Eastern Greenbrier-Western Greenbrier-
439 AM EDT Mon Aug 30 2021

...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

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

.DAY ONE...Today and tonight.

Scattered thunderstorms will be possible this afternoon and evening.
The main concern will be locally heavy rainfall and localized
flooding or flash flooding.

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

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

   Flash Flood Watch.

The remnants of Hurricane Ida will be passing through the region late
Tuesday through Wednesday. Widespread heavy rainfall is expected
which will lead to flooding, flash flooding, and eventually larger
main stem river flooding. In addition, gusty winds combined with the
heavy rainfall may bring down some trees and result in scattered
power outages. Finally, a few tornadoes will be possible across the
region as the tightly wound up circulation associated with the
remnants of Ida pass through the area late Tuesday into early
Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed. Reports should be
submitted by calling 1-866-215-4324, social media, email at
rnk.skywarn@noaa.gov or online at www.weather.gov/rnk.

RAB

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1244 PM EDT MON AUG 30 2021

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

0449 PM     TSTM WND DMG     4 W GALA                37.69N 79.89W
08/29/2021                   BOTETOURT          VA   911 CALL CENTER

            A LARGE TREE WAS BLOWN DOWN BY THUNDERSTORM
            WINDS NEAR THE INTERSECTION OF CRAIGS CREEK
            ROAD AND ROARING RUN ROAD.

&&

16

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1252 PM EDT MON AUG 30 2021

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

0515 PM     TSTM WND DMG     1 NE EAGLE ROCK         37.64N 79.79W
08/29/2021                   BOTETOURT          VA   911 CALL CENTER

            A TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS
            ALONG NARROW PASSAGE ROAD NEAR THE COMMUNITY
            OF EAGLE ROCK.

&&

16

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BLACKSBURG VA
1254 PM EDT MON AUG 30 2021

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

0550 PM     HAIL             1 ENE MC COY            37.24N 80.61W
08/29/2021  M0.75 INCH       MONTGOMERY         VA   FIRE DEPT/RESCUE

            MINOR DAMAGE TO EXPOSED VEHICLE. CRACKED
            SINGLE PANE GLASS ON OUTBUILDING.

0732 PM     TSTM WND DMG     4 NE COPPER VALLEY      37.01N 80.48W
08/29/2021                   MONTGOMERY         VA   PUBLIC

            ONE TREE DOWN IN THE 5800 BLOCK OF CHESTNUT
            RIDGE ROAD.

0830 PM     TSTM WND DMG     3 NW SHAWSVILLE         37.20N 80.30W
08/29/2021                   MONTGOMERY         VA   911 CALL CENTER

            *** 2 INJ ***
            TREE DOWN ON A VEHICLE NEAR INTERSECTION OF
            NORTHFORK ROAD AND SENECA HOLLOW ROAD. 2
            PEOPLE TRANSPORTED TO HOSPITAL. INJURY
            SEVERITY UNKNOWN.

0906 PM     FLASH FLOOD      2 ENE MERRIMAC          37.20N 80.39W
08/29/2021                   MONTGOMERY         VA   PUBLIC

            CEDAR RUN ROAD AT SWEENY ROAD FLOODED.
            VEHICLE DROVE INTO WATER, WATER CAME UP TO
            HEADLIGHTS, AND SWIFT WATER RESCUE HAD TO BE
            DONE. NO INJURIES. ROAD CLOSED.

0500 PM     TSTM WND DMG     3 N NEW CASTLE          37.55N 80.11W
08/29/2021                   CRAIG              VA   911 CALL CENTER

            A TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS
            ALONG C. C. MOUNTAIN ROAD.

0412 PM     HAIL             1 NNW COVINGTON CITY    37.80N 79.99W
08/29/2021  M0.50 INCH       CITY OF COVINGTON  VA   TRAINED SPOTTER

0430 PM     HEAVY RAIN       COVINGTON CITY          37.78N 79.98W
08/29/2021  E1.88 INCH       CITY OF COVINGTON  VA   PUBLIC

            STREET FLOODING AT ALLEGHENY AVE AND
            CHESTNUT STREET.

0449 PM     TSTM WND DMG     4 W GALA                37.69N 79.89W
08/29/2021                   BOTETOURT          VA   911 CALL CENTER

            A LARGE TREE WAS BLOWN DOWN BY THUNDERSTORM
            WINDS NEAR THE INTERSECTION OF CRAIGS CREEK
            ROAD AND ROARING RUN ROAD.

0515 PM     TSTM WND DMG     1 NE EAGLE ROCK         37.64N 79.79W
08/29/2021                   BOTETOURT          VA   911 CALL CENTER

            A TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS
            ALONG NARROW PASSAGE ROAD NEAR THE COMMUNITY
            OF EAGLE ROCK.

0210 PM     TSTM WND DMG     MOUNTAIN GROVE          38.10N 79.89W
08/29/2021                   BATH               VA   911 CALL CENTER

            A TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS
            IN THE COMMUNITY OF MOUNTAIN GROVE.

0253 PM     TSTM WND DMG     3 E WARM SPRINGS        38.06N 79.72W
08/29/2021                   BATH               VA   911 CALL CENTER

            A LARGE TREE WAS BLOWN DOWN BY THUNDERSTORM
            WINDS ALONG DRY RUN ROAD.

0300 PM     TSTM WND DMG     5 WSW NIMROD HALL       37.92N 79.72W
08/29/2021                   BATH               VA   911 CALL CENTER

            A LARGE TREE WAS BLOWN DOWN BY THUNDERSTORM
            WINDS ALONG THE COWPASTURE RIVER HIGHWAY.

0305 PM     TSTM WND DMG     HOT SPRINGS             38.00N 79.83W
08/29/2021                   BATH               VA   911 CALL CENTER

            A TREE WAS BLOWN DOWN BY THUNDERSTORM WINDS
            ALONG THE SAM SNEAD HIGHWAY NEAR THE
            COMMUNITY OF HOT SPRINGS.

0336 PM     HAIL             2 S NATURAL WELL        37.89N 79.97W
08/29/2021  E0.70 INCH       ALLEGHANY          VA   PUBLIC

0410 PM     TSTM WND DMG     2 ESE COVINGTON CITY    37.77N 79.96W
08/29/2021                   ALLEGHANY          VA   911 CALL CENTER

            AT LEAST TWO TREES WERE BLOWN DOWN BY
            THUNDERSTORM WINDS ALONG VALLEY RIDGE ROAD.

&&

Special Weather Statement
National Weather Service BLACKSBURG VA
127 PM EDT Mon Aug 30 2021

VAZ007-009-010-301800-
Tazewell VA-Bland VA-Smyth VA-
127 PM EDT Mon Aug 30 2021

...A strong thunderstorm will impact portions of
Smyth, southwestern Tazewell and southwestern Bland Counties through
200 PM EDT...

At 127 PM EDT, Doppler radar was tracking a strong thunderstorm over
Allison Gap, or over Saltville, moving east at 35 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Marion...
Saltville...
Chilhowie...
Cedar Bluff...
Ceres...
Nebo...
and Hungry Mother State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.

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.

&&

LAT...LON 3695 8182 3696 8178 3703 8181 3710 8178
      3702 8128 3697 8135 3697 8137 3695 8138
      3693 8136 3670 8153 3670 8154 3665 8157
      3664 8161 3665 8163 3679 8170 3693 8183
TIME...MOT...LOC 1727Z 289DEG 30KT 3691 8174

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

ET