weather impacts briefing nws nashville december 6, 2013

17
Weather Impacts Briefing NWS Nashville December 6, 2013

Upload: poppy

Post on 05-Feb-2016

37 views

Category:

Documents


0 download

DESCRIPTION

Weather Impacts Briefing NWS Nashville December 6, 2013. Impacts Summary. Three rounds of winter weather possible Round One northwest areas on Today Clarksville, Erin, Camden, Springfield, Dickson, Linden Round Two Saturday evening into Sun. Morning - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: Weather Impacts Briefing NWS Nashville December 6, 2013

Weather Impacts BriefingNWS Nashville

December 6, 2013

Page 2: Weather Impacts Briefing NWS Nashville December 6, 2013

Impacts Summary• Three rounds of winter weather possible

– Round One northwest areas on Today• Clarksville, Erin, Camden, Springfield, Dickson, Linden

– Round Two Saturday evening into Sun. Morning• More widespread winter weather impacts expected than with

round one– Northwest half of Middle TN affected including the Nashville Metro area

– Round Three Sunday night thru Monday• Some light ice accumulation possible, but looking more like snow.

• Locally heavy rain through the weekend• Except Saturday when mostly dry conditions expected

Page 3: Weather Impacts Briefing NWS Nashville December 6, 2013

Friday System Impacts

• Rain will change to freezing rain beginning in far northwest Middle TN this morning– Mixing with sleet in the afternoon/evening– Ice accumulations of 1/4 to 1/3 inch expected

• Greatest impacts around Clarksville, Camden, Erin and Dover

• Some tree/power lines downed• Travel impacted

– Precipitation ending in the evening

Page 4: Weather Impacts Briefing NWS Nashville December 6, 2013

Friday System Impacts…cont• Changeover to freezing rain expected from the

northwest during the late aftn-evening– Ice accumulations of 0.1 to 0.2 inch possible around

Springfield, Joelton, Dickson, Ashland City and Waverly

– Light ice accumulations (0.1 inch or less) expected around Nashville, Waynesboro, Gallatin

– Freezing rain ending in the evening

• Little ice impact expected further southeast and on the Plateau

Page 5: Weather Impacts Briefing NWS Nashville December 6, 2013

Ice Storm Warning

9 am through midnight

Winter WeatherAdvisory

4 pm through midnight

Page 6: Weather Impacts Briefing NWS Nashville December 6, 2013

Friday System Impacts…cont

Page 7: Weather Impacts Briefing NWS Nashville December 6, 2013

Ice Impact Index - Experimental

Page 8: Weather Impacts Briefing NWS Nashville December 6, 2013

Ice Impact Image Description

Page 9: Weather Impacts Briefing NWS Nashville December 6, 2013

Saturday Night-Sunday Impacts

• Freezing rain/sleet redevelops during the evening/early morning hours– Greatest impacts northwest half of Middle TN– Significant ice impacts (1/4 inch or greater) possible

northwest of a Portland to Joelton to Dickson to Camden line

– Lesser ice impacts (1/4 inch or less) from the Nashville metro area down to Waynesboro/Lawrenceburg

– Temperatures above freezing all areas by Sunday afternoon

Page 10: Weather Impacts Briefing NWS Nashville December 6, 2013

Saturday Night-Sunday

Page 11: Weather Impacts Briefing NWS Nashville December 6, 2013

Ice Impact Index - Experimental

Page 12: Weather Impacts Briefing NWS Nashville December 6, 2013

Heavy Rain/Flooding Impacts

• Locally heavy rains possible today into Friday – especially southeastern 2/3 of Middle TN– 2 to 3 inches of rain expected– Localized flooding problems possible

• Break in the rainfall on Saturday• More heavy rain potential on Sunday

– Greatest potential again southeast half– 1 to locally 2 inches possible– Localized creek flooding and minor river flooding possible

Page 13: Weather Impacts Briefing NWS Nashville December 6, 2013

5 Day Rainfall Forecast – thru next Wed am

Page 14: Weather Impacts Briefing NWS Nashville December 6, 2013

Sunday Night-Monday Impacts

• Freezing drizzle/sleet redevelops during the late night hours for the western half of middle TN

• Freezing drizzle lingers into Monday • Changeover to all snow Monday night

– Early forecasts thoughts of 1 to 2 inches east of I-65

Page 15: Weather Impacts Briefing NWS Nashville December 6, 2013

Impacts Summary

• Two rounds of winter weather expected – Round One northwest areas on Friday

• Clarksville, Erin, Camden, Springfield, Dickson, Linden

– Round Two Saturday evening into Sun. Morning• More widespread winter weather impacts expected

than with round one– Northwest half of Middle TN affected including the Nashville

Metro area

• Locally heavy rain through the weekend• Except Saturday when mostly dry conditions expected

Page 16: Weather Impacts Briefing NWS Nashville December 6, 2013

Briefing at 430 am Friday

• https://www1.gotomeeting.com/register/347553992

• Call: 1.866.231.8384 code: 6157548500

16

Page 17: Weather Impacts Briefing NWS Nashville December 6, 2013

QUESTIONS?*Please hit #6 to turn off mute*

[email protected] - 24/7