Alert archive / North Carolina / Heat Advisories in 2011

Heat Advisory 3, NWS Raleigh, NC

July 19, 201125 counties in North Carolina

NWS Raleigh, NC issued this heat advisory at Jul 19, 2011, 3:15 PM EDT for 25 counties in North Carolina. It took effect at Jul 20, 2011, 12:00 PM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jul 19, 2011, 3:15 PM EDT (19:15 UTC)
In effect from: Jul 20, 2011, 12:00 PM EDT
Expired: Jul 20, 2011, 9:00 PM EDT
In force: 9 hr
Issued by: NWS Raleigh, NC

All 25 counties

Anson County, NC, Chatham County, NC, Cumberland County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 30 km from the middle of the area, began a volume at 19:14 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, 7.3 hours before the alert went out and 111 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: 45 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1357 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat advisory 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 heat advisory went out at Jul 19, 2:50 PM EDT, 25 minutes earlier.

Area forecast discussion, Jul 19, 2:50 PM EDT, 25 minutes before

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Hazardous weather outlook, Jul 19, 4:28 AM EDT, 10 hours 47 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 19, 3:51 PM EDT	Special Weather Statement	RAH	Forsyth	69 min
Jul 19, 4:56 PM EDT	Severe Thunderstorm Warning	RAH	Forsyth, Guilford	49 min
Jul 19, 5:49 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth	41 min
Jul 19, 5:58 PM EDT	Areal Flood Advisory	RAH	Davidson	92 min
Jul 19, 6:46 PM EDT	Special Weather Statement	RAH	Johnston	29 min

Nearby

Heat Advisories in North Carolina, 2011 Every heat advisory in 2011

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.