Alert archive / North Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Greenville-Spartanburg, SC

August 4, 2017Madison County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Aug 4, 2017, 4:24 PM EDT for Madison County, North Carolina. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2017, 4:24 PM EDT (20:24 UTC)
Expired: Aug 4, 2017, 5:15 PM EDT
In force: 51 min
Issued by: NWS Greenville-Spartanburg, SC

County Madison County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.4 hours before the alert went out and 265 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 57 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1114 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this special weather statement went out at Aug 4, 2:44 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Aug 4, 2:44 PM EDT, 1 hour 40 minutes before

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Hazardous weather outlook, Aug 4, 5:31 AM EDT, 10 hours 53 minutes before

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In the hours before

Special weather statement, Aug 4, 4:24 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
424 PM EDT FRI AUG 4 2017

NCZ048-052-042115-
Haywood NC-Madison NC-
424 PM EDT FRI AUG 4 2017

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT MADISON
AND NORTH CENTRAL HAYWOOD COUNTIES UNTIL 515 PM EDT...

At 423 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 15 miles west of Marshall, or 8 miles east of Smoky
Mountains-Big Creek, moving east at 30 mph.

Locations to be impacted include...
Marshall, Hot Springs, Allenstand, Walnut, Luck, Fines Creek, Spring
Creek, Max Patch and Canto.

In addition to intense lightning, wind gusts up to 40 mph and pea
size hail will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

Frequent lightning is occurring with this storm. If outdoors, try to
get indoors or into a hard topped vehicle. Otherwise, stay away from
open areas and isolated high objects such as trees. When indoors,
stay away from windows and doors and avoid using wired electronic
devices. Do not take a shower or bath. Try to unplug unnecessary
appliances before the storm approaches.

&&

LAT...LON 3576 8262 3573 8267 3573 8271 3572 8271
      3569 8281 3570 8285 3568 8288 3568 8302
      3579 8306 3577 8299 3584 8292 3587 8292
      3588 8290 3593 8292 3595 8287 3593 8281
      3597 8278 3600 8278 3603 8271
TIME...MOT...LOC 2023Z 255DEG 24KT 3579 8297

CDG

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 5:42 PM EDT	Special Weather Statement	GSP	Buncombe	33 min
Aug 4, 5:44 PM EDT	Areal Flood Advisory	GSP	Haywood, Madison	2 hr
Aug 4, 5:59 PM EDT	Special Weather Statement	GSP	McDowell	46 min
Aug 4, 6:35 PM EDT	Severe Thunderstorm Warning	GSP	McDowell, Rutherford	40 min
Aug 4, 7:07 PM EDT	Special Weather Statement	GSP	Catawba	23 min
Aug 4, 7:16 PM EDT	Special Weather Statement	GSP	Rutherford	59 min
Aug 4, 7:32 PM EDT	Special Weather Statement	GSP	Alexander	43 min
Aug 4, 7:37 PM EDT	Special Weather Statement	GSP	Catawba	38 min
Aug 4, 7:54 PM EDT	Special Weather Statement	GSP	Cleveland, Rutherford	51 min

Nearby

Special Weather Statements in North Carolina, 2017 Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.