Alert archive / North Carolina / Heat Advisories in 2005

Heat Advisory 7, NWS Raleigh, NC

July 27, 200523 counties in North Carolina

NWS Raleigh, NC issued this heat advisory at Jul 27, 2005, 4:09 PM EDT for 23 counties in North Carolina. It took effect at Jul 28, 2005, 12:00 PM EDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jul 27, 2005, 4:09 PM EDT (20:09 UTC)
In effect from: Jul 28, 2005, 12:00 PM EDT
Expired: Jul 28, 2005, 5:00 PM EDT
In force: 5 hr
Issued by: NWS Raleigh, NC

All 23 counties

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, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 15 km from the middle of the area, began a volume at 20:13 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, 8.2 hours before the alert went out and 120 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: 1356 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1518 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -10 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 27, 2:30 PM EDT, 1 hour 39 minutes earlier.

Area forecast discussion, Jul 27, 2:30 PM EDT, 1 hour 39 minutes before

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Hazardous weather outlook, Jul 27, 5:03 AM EDT, 11 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
503 AM EDT WED JUL 27 2005

NCZ007>011-021>028-038>043-073>078-083>086-088-089-280915-
PERSON-GRANVILLE-VANCE-WARREN-HALIFAX-FORSYTH-GUILFORD-ALAMANCE-
ORANGE-DURHAM-FRANKLIN-NASH-EDGECOMBE-DAVIDSON-RANDOLPH-CHATHAM-
WAKE-JOHNSTON-WILSON-STANLY-MONTGOMERY-MOORE-LEE-HARNETT-WAYNE-
ANSON-RICHMOND-SCOTLAND-HOKE-CUMBERLAND-SAMPSON-
503 AM EDT WED JUL 27 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL NORTH
CAROLINA.

.DAY ONE...TODAY AND TONIGHT

VERY HOT CONDITIONS WILL CONTINUE TODAY. THE HEAT COMBINED WITH
THE HUMIDITY WILL CREATE HEAT INDEX VALUES AT OR ABOVE 110 DEGREES
OVER THE EASTERN PIEDMONT...COASTAL PLAIN AND SANDHILLS THIS
AFTERNOON. THE HEAT INDEX IN THE NORTHERN AND WESTERN PIEDMONT
WILL REACH BETWEEN 105 AND 110 DEGREES. REFER TO THE PRODUCT
RDUNPWRAH FOR FURTHER DETAILS.

ISOLATED TO SCATTERED STRONG THUNDERSTORMS ARE POSSIBLE LATE DAY
AND THIS EVENING OVER THE NORTHERN PIEDMONT AND THE NORTHERN
COASTAL PLAIN. THE MAIN HAZARDS FROM THESE STORMS WILL BE NUMEROUS
TO NEARLY CONTINUOUS LIGHTNING STRIKES AND WIND GUSTS UP TO 40
MPH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THE THREAT FOR SHOWERS AND THUNDERSTORMS WILL INCREASE ACROSS
CENTRAL NORTH CAROLINA LATE THURSDAY THROUGH FRIDAY AND PERSIST
INTO EARLY NEXT WEEK. DUE TO THE MOIST AIRMASS AND THE POTENTIAL
FOR THE STORMS TO MOVE REPEATEDLY ACROSS THE SAME
LOCATION...LOCALLY EXCESSIVE RAINFALL IS POSSIBLE...ESPECIALLY
FRIDAY INTO SATURDAY. THIS MAY LEAD TO LOCALIZED FLOODING
PROBLEMS. THE STORMS WILL ALSO PRODUCE FREQUENT LIGHTNING AND WIND
GUSTS UP TO 35 MPH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

Nearby

Heat Advisories in North Carolina, 2005 Every heat advisory in 2005

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.