Greenville-Spartanburg, October 9, 2025
News Summary
The National Weather Service has issued alerts for dense fog across several counties and strong thunderstorms expected in the Greenville-Spartanburg area. Visibility may drop to 1/4 mile or less due to fog, while thunderstorms could bring pea-sized hail and gusty winds. Motorists are encouraged to drive cautiously, and residents should seek shelter during the storms. Additionally, upcoming system upgrades at the NWS could temporarily disrupt weather communication services.
Weather Alerts Issued for Dense Fog and Strong Thunderstorms in Greenville-Spartanburg Area
The National Weather Service (NWS) Greenville-Spartanburg SC has issued a weather alert for dense fog in the area, effective from 5:47 a.m. to 9 a.m. on Tuesday. The dense fog alert covers multiple counties, including Cherokee, York, Anderson, Abbeville, Laurens, Union, Chester, Greenwood, Greenville, and Spartanburg.
Patchy dense fog is creating hazardous driving conditions, with visibility dropping to 1/4 mile or less in localized areas. The most affected regions include Greenville, Spartanburg, Anderson, Elberton, Shelby, Laurens, Greenwood, and Abbeville. Motorists are advised to exercise caution by employing low beams, reducing speed, and maintaining safe distances from other vehicles. The fog is expected to dissipate by 9 a.m., according to the NWS.
In addition, the NWS issued another weather alert on Wednesday at 4:41 p.m. for strong thunderstorms across Greater Pickens and Anderson County, valid until 5:15 p.m. The storms are anticipated to produce pea-sized hail (0.25 inches) and wind gusts reaching up to 40 mph. As of 4:40 p.m., Doppler radar detected a strong storm near Clemson and close to Pendleton, which was almost stationary.
The storms pose risks of gusty winds that may take down tree limbs and displace unsecured items, alongside possible minor hail damage to outdoor possessions. Locations impacted by these thunderstorms include Clemson, Anderson, Central, Northlake, Pendleton, Anderson Airport, Norris, and Sandy Springs. Residents are urged to seek indoor shelter during the storm activity.
Nationwide, lightning strikes occur approximately 25 million times annually, predominantly in summer months, with an average of 20 deaths per year linked to lightning. The risk of lightning is highest as a storm approaches and reaches its peak during the storm. Following the storm, the risk decreases significantly.
The NWS also warns of another hazard—hydroplaning. This dangerous situation is when a vehicle loses traction on wet roads due to water accumulation in front of the tires. Drivers are advised to stay alert and take necessary precautions during adverse weather conditions.
In addition to the current weather events, the Greenville-Spartanburg NWS will undergo a system upgrade from June 2 to June 4, 2025, which will temporarily affect weather communication services. This upgrade involves overhauling the Advanced Weather Interactive Processing System (AWIPS) and will impact NOAA Weather Radio coverage in Charlotte. Nonetheless, critical weather forecast operations will continue from Columbia, SC. During the upgrade, NOAA Weather Radio transmitters, including those serving Charlotte and surrounding regions, will be off-air. Residents are encouraged to rely on alternative weather alert systems such as wireless emergency alerts (WEAs) and mobile weather apps during this period.
Safety Recommendations
The NWS has provided several safety tips for traveling in foggy conditions:
- Moderate speed
- Avoid high-beams
- Keep a safe distance
- Stay in your lane
- Adhere to zero visibility protocols
FAQ
What areas are under dense fog alert?
Cherokee, York, Anderson, Abbeville, Laurens, Union, Chester, Greenwood, Greenville, and Spartanburg counties are under the dense fog alert.
What should motorists do in dense fog?
Motorists are advised to use extra caution, employ low beams, reduce speed, and maintain safe distances from other vehicles.
What can we expect from the upcoming thunderstorms?
The thunderstorms are forecasted to produce pea-sized hail (0.25 inches) and wind gusts up to 40 mph.
Which towns are expected to be affected by the thunderstorms?
Areas affected include Clemson, Anderson, Central, Northlake, Pendleton, Anderson Airport, Norris, and Sandy Springs.
When will the Greenville-Spartanburg NWS undergo the system upgrade?
The Greenville-Spartanburg NWS will undergo a system upgrade from June 2 to June 4, 2025.
Weather Alert Summary
| Weather Condition | Area Affected | Details | Advice |
|---|---|---|---|
| Dense Fog | Cherokee, York, Anderson, Abbeville, Laurens, Union, Chester, Greenwood, Greenville, Spartanburg | Visibilities dropping to 1/4 mile or less | Use low beams, reduce speed, maintain safe distance |
| Strong Thunderstorms | Greater Pickens and Anderson County | Pea-sized hail, wind gusts up to 40 mph | Seek indoor shelter during thunderstorms |
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Additional Resources
- Greenville Online: Weather Alert
- Wikipedia: Weather Alert
- Fox Carolina: First Alert Weather Day
- Encyclopedia Britannica: Thunderstorm
- WYFF4: Severe Weather Timing
- Google News: Weather Alerts
- Charlotte Observer: Weather News
- Google Search: Weather Safety
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