Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Raleigh, NC

August 12, 2021Moore County, North Carolina

NWS Raleigh, NC issued this special weather statement at Aug 12, 2021, 7:15 PM EDT for Moore County, North Carolina. It was in force for 45 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 12, 2021, 7:15 PM EDT (23:15 UTC)
Expired: Aug 12, 2021, 8:00 PM EDT
In force: 45 min
Issued by: NWS Raleigh, NC
Hail: 0.25 in
Wind: 30

County Moore County, NC

The radar

The Raleigh/Durham radar (KRAX), 85 km from the middle of the area, began a volume at 23:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.3 hours before the alert went out and 86 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: 1015 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -15 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 Raleigh, NC wrote its last area forecast discussion before this special weather statement went out at Aug 12, 7:04 PM EDT, 11 minutes earlier.

Area forecast discussion, Aug 12, 7:04 PM EDT, 11 minutes before

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Hazardous weather outlook, Aug 12, 7:08 PM EDT, 7 minutes before

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In the hours before

Special weather statement, Aug 12, 4:56 PM EDT, 2 hours 19 minutes before

Special Weather Statement
National Weather Service Raleigh NC
456 PM EDT Thu Aug 12 2021

NCZ021-022-038-122200-
Guilford NC-Forsyth NC-Davidson NC-
456 PM EDT Thu Aug 12 2021

...A strong thunderstorm will impact portions of Forsyth, northern
Davidson and Guilford Counties through 600 PM EDT...

At 453 PM EDT, Doppler radar was tracking an area of strong
thunderstorms over the Triad, including Winston-Salem, moving
northeast at 5 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Greensboro, Winston-Salem, High Point, Lexington, Thomasville,
Kernersville, Clemmons, Bermuda Run, Huntsville and Linwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning and heavy rainfall are occurring
with these storms. Lightning can strike 10 miles away from a
thunderstorm. Seek a safe shelter inside a building or vehicle.

&&

LAT...LON 3611 8050 3614 8044 3626 8045 3624 7953
      3606 7954 3592 8005 3572 8036 3574 8046
      3577 8045 3583 8048 3584 8039 3586 8039
      3588 8042 3589 8037 3596 8038 3599 8042
      3601 8042 3606 8046 3604 8049 3608 8052
TIME...MOT...LOC 2053Z 235DEG 4KT 3607 8035

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Kren

Special weather statement, Aug 12, 5:59 PM EDT, 1 hour 16 minutes before

Special Weather Statement
National Weather Service Raleigh NC
559 PM EDT Thu Aug 12 2021

NCZ021-022-038-122300-
Guilford NC-Forsyth NC-Davidson NC-
559 PM EDT Thu Aug 12 2021

...An area of strong thunderstorms will impact portions of Forsyth,
northern Davidson and Guilford Counties through 700 PM EDT...

At 557 PM EDT, Doppler radar was tracking a strong thunderstorm near
Winston-Salem, moving east at 10 mph. Locally heavy flooding is
possible in urban areas.

HAZARD...Winds in excess of 30 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Greensboro, Winston-Salem, High Point, Thomasville, Kernersville,
Clemmons, Bermuda Run, McLeansville, Lewisville and Summerfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Heavy rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3626 8007 3624 7953 3606 7954 3592 8001
      3592 8004 3590 8006 3583 8038 3589 8041
      3589 8037 3596 8038 3599 8042 3601 8042
      3606 8046 3604 8049 3606 8051 3609 8051
TIME...MOT...LOC 2157Z 278DEG 9KT 3604 8022

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...30 MPH

CA

Special weather statement, Aug 12, 6:03 PM EDT, 1 hour 12 minutes before

Special Weather Statement
National Weather Service Raleigh NC
603 PM EDT Thu Aug 12 2021

NCZ041-122300-
Wake NC-
603 PM EDT Thu Aug 12 2021

...A strong thunderstorm will impact portions of north central Wake
County through 700 PM EDT...

At 602 PM EDT, Doppler radar was tracking a strong thunderstorm near
Wake Forest, or 8 miles northeast of Raleigh. This storm was nearly
stationary.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Raleigh, Wake Forest, Falls Lake Boat Ramp and Falls Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Heavy rain can be expected due to the slow movement of this storm.
Prolonged heavy rain will result in ponding of water on roadways,
standing water in low lying areas, and minor flooding of creeks and
streams. Drivers are urged to slow down and use extra caution to
avoid hydroplaning.

&&

LAT...LON 3585 7854 3585 7863 3590 7869 3597 7869
      3602 7863 3601 7854 3596 7848 3589 7849
TIME...MOT...LOC 2202Z 223DEG 3KT 3594 7859

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

10

Special weather statement, Aug 12, 6:22 PM EDT, 53 minutes before

Special Weather Statement
National Weather Service Raleigh NC
622 PM EDT Thu Aug 12 2021

NCZ008-025-122300-
Durham NC-Granville NC-
622 PM EDT Thu Aug 12 2021

...A strong thunderstorm will impact portions of southwestern
Granville and central Durham Counties through 700 PM EDT...

At 621 PM EDT, Doppler radar was tracking a strong thunderstorm near
Butner, or 7 miles west of Creedmoor. This storm was nearly
stationary.

HAZARD...Winds in excess of 30 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Durham, Creedmoor, Butner, Stem, Lake Michie, Lake Butner, Gorman,
Rollingview Marina, Falls Lake and Eno River State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Heavy rain can be expected due to the slow movement of this storm.
Prolonged heavy rain will result in ponding of water on roadways,
standing water in low lying areas, and minor flooding of creeks and
streams. Drivers are urged to slow down and use extra caution to
avoid hydroplaning.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3619 7868 3614 7865 3607 7868 3608 7873
      3607 7875 3603 7875 3602 7874 3603 7872
      3601 7870 3600 7871 3598 7879 3600 7888
      3606 7894 3614 7890 3620 7883
TIME...MOT...LOC 2221Z 214DEG 2KT 3610 7882

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...30 MPH

CA

Local storm report, Aug 12, 6:51 PM EDT, 24 minutes before

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Special weather statement, Aug 12, 7:15 PM EDT, 0 minutes before

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The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 3:30 PM EDT	Heat Advisory	RAH	Chatham, Cumberland, Durham, Edgecombe, Franklin, Granville and 12 more	28 hr
Aug 12, 4:39 PM EDT	Special Weather Statement	RAH	Franklin	66 min
Aug 12, 4:56 PM EDT	Special Weather Statement	RAH	Forsyth, Guilford	64 min
Aug 12, 5:21 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth	39 min
Aug 12, 5:38 PM EDT	Areal Flood Advisory	RAH	Forsyth	108 min
Aug 12, 5:59 PM EDT	Special Weather Statement	RAH	Forsyth, Guilford	61 min
Aug 12, 6:03 PM EDT	Special Weather Statement	RAH	Wake	57 min
Aug 12, 6:22 PM EDT	Special Weather Statement	RAH	Durham	38 min

Nearby

Special Weather Statements in North Carolina, 2021 Every special weather statement in 2021

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; radar from the NEXRAD Level II archive.