Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Raleigh, NC

July 13, 2021Chatham County, North Carolina

NWS Raleigh, NC issued this special weather statement at Jul 13, 2021, 6:57 PM EDT for Chatham County, North Carolina. It was in force for 33 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: Jul 13, 2021, 6:57 PM EDT (22:57 UTC)
Expired: Jul 13, 2021, 7:30 PM EDT
In force: 33 min
Issued by: NWS Raleigh, NC

County Chatham County, NC

The radar

The Raleigh/Durham radar (KRAX), 41 km from the middle of the area, began a volume at 22:59 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, 11.0 hours before the alert went out and 99 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1407 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: -24 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 Jul 13, 4:00 PM EDT, 2 hours 57 minutes earlier.

Area forecast discussion, Jul 13, 4:00 PM EDT, 2 hours 57 minutes before

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Hazardous weather outlook, Jul 13, 4:59 AM EDT, 13 hours 58 minutes before

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In the hours before

Special weather statement, Jul 13, 5:12 PM EDT, 1 hour 45 minutes before

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Special weather statement, Jul 13, 6:05 PM EDT, 52 minutes before

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Special weather statement, Jul 13, 6:57 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
Jul 13, 5:12 PM EDT	Special Weather Statement	RAH	Anson, Montgomery	33 min
Jul 13, 6:05 PM EDT	Special Weather Statement	RAH	Randolph	25 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.