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Page 1: Multiday Episode
Page 2: Multiday Episode

Severe Weather and Heavy Rainfall Event

Wednesday, April 30, 2014

11:50 AM EDT

Greenville/Spartanburg

Page 3: Multiday Episode

High Impact Weather Event

(Severe Weather and Heavy Rainfall Discussion)

• Low pressure in Wisconsin will wobble very little today before lifting into Ontario Canada Thursday. A slow moving cold front will shift through our region tonight and Thursday morning.

• So far the primary severe weather has been confined west/south and east of the western Carolinas and northeast Georgia. Also tremendous convection / showers and storms / along the Gulf Coast has also hindered transport of additional moisture into the area.

• Nevertheless…the cold front will move into and across the area tonight…before exiting Thursday morning. We still believe that a blowup of thunderstorms will occur today. One area of concern will be roughly from the I77 corridor south-southwest to the eastern upstate of South Carolina. The other will be from thunderstorms moving east from Tennessee and Georgia into our western forecast area this afternoon. Again all modes of severe weather will be possible including: damaging winds…large hail and a few tornadoes. The greater tornado potential appears to be lining up across the aforementioned eastern forecast areas.

• The front will cross the area tonight…with additional showers and thunderstorms…some potentially severe. Additional showers may linger Thursday morning…primarily in our eastern sections of responsibility.

• Rainfall rates with any slow moving…or repeating showers and storms…could yield rainfall amounts of 1 to 2 inches per hour. The area of greatest soil moisture is roughly in the southern and central mountains of North Carolina…as well as the Charlotte area in the western Piedmont. These rainfall rates may be enough to cause flash flooding. Meanwhile heavy rainfall falling on top of saturated soil still may promote the possibility of slope failures and landslides in the mountainous terrain of western North Carolina.

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

• 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

Greenville/Spartanburg

…Flash Flood Watch Continues Through the Evening…

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Greenville/Spartanburg

Page 5: Multiday Episode

Greenville/Spartanburg

Page 6: Multiday Episode

SPC Day 1 Categorical Outlook

Greenville/Spartanburg

Page 7: Multiday Episode

SPC Day 1 Tornado Probabilities

Greenville/Spartanburg

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SPC Day 1 Severe Wind Probabilities

Greenville/Spartanburg

Page 9: Multiday Episode

SPC Day 1 Severe Hail Probabilities

Greenville/Spartanburg

Page 10: Multiday Episode

Hazardous Weather Outlook Greenville/Spartanburg

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Hazardous Weather Outlook Greenville/Spartanburg

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Greenville/Spartanburg