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Multi-Day Severe Weather and Heavy Rainfall Event

Sunday, April 27, 2014

4:50 PM EDT

Greenville/Spartanburg

Multi-Day High Impact Weather Event

(Severe Weather Discussion)

• A complex weather pattern yielding High Impact Weather is expected across our region Monday through Wednesday. Low pressure in Nebraska will only reach southern Lake Michigan on Wednesday. A cold front trailing from the low will only reach the Carolinas Wednesday. Meanwhile an east to west frontal boundary will waffle north and south…the next few days…in

the Carolinas and northeast Georgia.

• Copious moisture…coupled with increasingly robust wind fields…and the east to west frontal boundary…will likely yield at least several ( if not many ) rounds of showers and thunderstorms through Wednesday. The final round will be with the cold frontal passage Wednesday night.

• A number of these thunderstorm episodes will likely produce severe weather from Monday afternoon through Wednesday. There may be an enhanced severe weather period or two as well. All modes of severe weather will be possible including damaging winds large hail and tornadoes.

• There appears to be an increasing tornado risk from northeast Georgia…upstate South Carolina and western North Carolina Monday afternoon and Monday night. This should be monitored very closely!

• Multiple rounds of thunderstorms will continue Tuesday and Tuesday night…with a damaging wind…large hail and a tornado threat remaining. An enhancement of the severe weather potential is also possible Tuesday and Tuesday night…most likely driven by small scale details and previous shower and thunderstorm activity.

• The cold front will edge across the region Wednesday and Wednesday night with yet additional severe weather possible.

• All interests should continue to monitor what appears to be a period of rapidly changing and potentially dangerous weather conditions.

• It is important that everyone review their emergency action plans…and be ready to utilize them at a moments notice.

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Multi-Day High Impact Weather Event

(Heavy Rainfall Potential)

• A complex weather pattern yielding High Impact Weather is expected across our region Monday through Wednesday. Low pressure in Nebraska will only reach southern Lake Michigan on Wednesday. A cold front trailing from the low will only reach the Carolinas Wednesday. Meanwhile an east to west frontal boundary will waffle north and south…the next few days…in

the Carolinas and northeast Georgia.

• Copious moisture will likely yield at least several ( if not many ) rounds of showers and thunderstorms through Wednesday. The final round will be with the cold frontal passage Wednesday night.

• Showers and thunderstorms will likely produce torrential downpours…particularly Tuesday into Wednesday. It is possible that Flood or Flash Flood Watches will be needed in future forecasts.

• Early rainfall estimates through Wednesday suggest average rainfall amounts of 3 to 5 inches. It is possible that local areas may have total amounts around one half foot…or slightly more.

• There may be an increased risk of landslides and slope failures over the North Carolina mountains Tuesday night and

Wednesday.

• As a result it is important to remain vigilant…particularly if you are in a flood prone area…near creeks and streams…and even main stem rivers.

• Please monitor the latest forecast through the local media…social media…NOAA Weather Radio and the web site at the National Weather Service office in Greenville-Spartanburg SC at: www.weather.gov/gsp

• Tony Sturey

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http://www.weather.gov.gsp/

Hazardous Weather Outlook Greenville/Spartanburg

SPC Day 2 Categorical Outlook (Monday)


SPC Day 3 Categorical Outlook (Tuesday) Greenville/Spartanburg

Hazardous Weather Outlook Greenville/Spartanburg

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