severe thunderstorms, flash flooding, & isolated tornadoes ... · weather forecast office...

Weather Forecast Office Presentation Created

4/15/2018 7:31 AM Follow us on Twitter Follow us on Facebook

Slight Risk for Severe Thunderstorms

Upgraded to Enhanced Risk

Flash Flood Watch Now in Effect for this

Afternoon and Evening

Rainfall Amounts Increased Slightly

Severe Thunderstorms, Flash Flooding, &

Isolated Tornadoes Possible

What Has Changed?

Decision Support Briefing #4

As of: 700 AM April 15, 2018

Blacksburg, VA 1

https://www.facebook.com/NWSGray/

https://twitter.com/NWSGray

https://twitter.com/NWSBlacksburg

https://www.facebook.com/NWSBlacksburg







Flash Flooding and Flooding

Possible

Blacksburg, VA 2

Potential for storms to train along slow moving front Sunday afternoon/evening producing flooding/flash flooding.

Impacts include flooded roads and some streams and creeks out of their banks.











Main Points

Hazard Impacts Location Timing

Damaging

Winds

Flash

Flooding

Tornadoes

Localized downed trees and

power lines expected. Isolated

structural damage possible with

the strongest storms.

Creeks and rivers may rise out

of their banks and cause

flooding in low-lying and

typically vulnerable locations.

Isolated tornadoes possible with

damage to structures, trees, and

power lines. Power outages

possible.

Entire Region

Entire Region

North Carolina and

Virginia Foothills and

Piedmont

Sunday Afternoon & Evening



Blacksburg, VA 3







None Limited Elevated Significant Extreme

Summary of Greatest Impacts



Damaging Thunderstorm Winds: Entire Region

Flash Flooding: Entire Region

Tornadoes: North Carolina & Virginia Foothills

Blacksburg, VA 4











5

Timing of Storms Simulated Radar Image for 2 PM EDT

Sunday, April 15, 2018 Simulated Radar Image for 7 PM EDT

Sunday April 15, 2018








4/15/2018 7:31 AM Follow us on Twitter Follow us on Facebook 6

Simulated Radar Image for 11 PM EDT, Sunday, April 15, 2018







7

Rainfall Forecast









Event Summary

Main threat from damaging winds with north-

south oriented line of thunderstorms Sunday

afternoon and evening.

Isolated tornadoes possible east of the Blue

Ridge.

Heavy rain with leading line of storms, followed

by longer period of moderate rain with the cold

front could result in flash flooding Sunday

afternoon to just after midnight Sunday night.

Minor river flooding possible, with at least

elevated rises on main stem rivers.

Blacksburg, VA 8











Contact Resources

Blacksburg, VA 9

Share your reports of storm damage, hail and/or flooding with our office by using one of the methods listed below, or by submitting an online report through the 'submit a storm report' icon at the bottom of our web site: Telephone: 1-540-552-0084 E-mail: [email protected] Facebook: www.fb.com/NWSBlacksburg Twitter: @NWSBlacksburg NWS Blacksburg web page: www.weather.gov/rnk or mobile.weather.gov In addition, please monitor our web page and social media feeds, as well as these other web sites for the latest updates on the forecast: Storm Prediction Center: www.spc.noaa.gov Weather Prediction Center: www.wpc.ncep.noaa.gov River Information: http://water.weather.gov/ahps2/index.php?wfo=rnk









http://www.fb.com/NWSBlacksburg



Contact and Next Briefing Information

Next Briefing (if needed)

Disclaimer: The information contained within this briefing is

time-sensitive, do not use after 7 PM Sunday (04/15/18).

Method: Email

When: By 6 PM This Evening

Blacksburg, VA 10

Web:

http://www.weather.gov/rnk

Phone (public):

(540) 552-0084

E-mail:

[email protected]

Facebook:

/NWSBlacksburg

Twitter:

@NWSBlacksburg

YouTube:

NWS RNK









http://www.weather.gov/rnk

mailto:[email protected]



https://www.youtube.com/user/NWSBlacksburgVA

severe thunderstorms, flash flooding, & isolated tornadoes ... · weather forecast office...

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