Alert archive / North Carolina / Heat Advisories in 2021
Heat Advisory 2, NWS Raleigh, NC
NWS Raleigh, NC issued this heat advisory at Aug 10, 2021, 2:41 PM EDT for 17 counties in North Carolina. It took effect at Aug 11, 2021, 11:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2021, 2:41 PM EDT (18:41 UTC)
- In effect from
- Aug 11, 2021, 11:00 AM EDT
- Expired
- Aug 11, 2021, 7:00 PM EDT
- In force
- 8 hr
- Issued by
- NWS Raleigh, NC
Counties Alamance County, NC, Chatham County, NC, Cumberland County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Halifax County, NC, Harnett County, NC, Johnston County, NC, Lee County, NC, Nash County, NC, Orange County, NC, Sampson County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC
The radar
The Raleigh/Durham radar (KRAX), 9 km from the middle of the area, began a volume at 18:44 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, 6.7 hours before the alert went out and 132 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.
- Mixed-layer CAPE
- 1302 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 948 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
043 WWUS72 KRAH 101841 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 241 PM EDT Tue Aug 10 2021 NCZ023>025-040>042-076-077-088-110900- /O.NEW.KRAH.HT.Y.0002.210811T1500Z-210811T2300Z/ Alamance-Orange-Durham-Chatham-Wake-Johnston-Lee-Harnett- Cumberland- Including the cities of Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, Fayetteville, Spring Lake, and Hope Mills 241 PM EDT Tue Aug 10 2021 ...HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM EDT WEDNESDAY... * WHAT...Heat index values 104-107 expected. * WHERE...Alamance, Orange, Durham, Chatham, Wake, Johnston, Lee, Harnett and Cumberland Counties. * WHEN...From 11 AM to 7 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
3 follow-up statements
003 WWUS72 KRAH 110743 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 343 AM EDT Wed Aug 11 2021 NCZ010-011-026>028-043-078-089-112300- /O.EXA.KRAH.HT.Y.0002.210811T1500Z-210811T2300Z/ Warren-Halifax-Franklin-Nash-Edgecombe-Wilson-Wayne-Sampson- Including the cities of Warrenton, Norlina, Roanoke Rapids, Enfield, Scotland Neck, Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Wilson, Goldsboro, Clinton, and Roseboro 343 AM EDT Wed Aug 11 2021 ...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT THIS EVENING... * WHAT...Heat index values up to 105 expected. * WHERE...Warren, Halifax, Franklin, Nash, Edgecombe, Wilson, Wayne and Sampson Counties. * WHEN...From 11 AM to 7 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NCZ023>025-040>042-076-077-088-112300- /O.CON.KRAH.HT.Y.0002.210811T1500Z-210811T2300Z/ Alamance-Orange-Durham-Chatham-Wake-Johnston-Lee-Harnett- Cumberland- Including the cities of Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, Fayetteville, Spring Lake, and Hope Mills 343 AM EDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT THIS EVENING... * WHAT...Heat index values around 105 expected. * WHERE...Alamance, Orange, Durham, Chatham, Wake, Johnston, Lee, Harnett and Cumberland Counties. * WHEN...From 11 AM to 7 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
366 WWUS72 KRAH 111605 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 1205 PM EDT Wed Aug 11 2021 NCZ010-011-023>028-040>043-076>078-088-089-112300- /O.CON.KRAH.HT.Y.0002.000000T0000Z-210811T2300Z/ Warren-Halifax-Alamance-Orange-Durham-Franklin-Nash-Edgecombe- Chatham-Wake-Johnston-Wilson-Lee-Harnett-Wayne-Cumberland-Sampson- Including the cities of Warrenton, Norlina, Roanoke Rapids, Enfield, Scotland Neck, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, Knightdale, Smithfield, Selma, Clayton, Wilson, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, Goldsboro, Fayetteville, Spring Lake, Hope Mills, Clinton, and Roseboro 1205 PM EDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... * WHAT...Maximum heat index of 105 to 107 degrees, except a few degrees lower over the Piedmont. * WHERE...For the Coastal Plain, eastern Sandhills, and a portion of the Piedmont of central North Carolina. * WHEN...Until 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
509 WWUS72 KRAH 111938 NPWRAH URGENT - WEATHER MESSAGE National Weather Service Raleigh NC 338 PM EDT Wed Aug 11 2021 NCZ011-027-028-042-043-078-089-120900- /O.NEW.KRAH.HT.Y.0003.210812T1600Z-210812T2300Z/ /O.CON.KRAH.HT.Y.0002.000000T0000Z-210811T2300Z/ Halifax-Nash-Edgecombe-Johnston-Wilson-Wayne-Sampson- Including the cities of Roanoke Rapids, Enfield, Scotland Neck, Nashville, Spring Hope, Rocky Mount, Tarboro, Princeville, Smithfield, Selma, Clayton, Wilson, Goldsboro, Clinton, and Roseboro 338 PM EDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM NOON TO 7 PM EDT THURSDAY... * WHAT...Maximum heat index values of 105 to 108 degrees expected. * WHERE...Halifax, Nash, Edgecombe, Johnston, Wilson, Wayne and Sampson Counties. * WHEN...For the first Heat Advisory, until 7 PM EDT this evening. For the second Heat Advisory, from noon to 7 PM EDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NCZ010-023>026-040-041-076-077-088-112300- /O.CON.KRAH.HT.Y.0002.000000T0000Z-210811T2300Z/ Warren-Alamance-Orange-Durham-Franklin-Chatham-Wake-Lee-Harnett- Cumberland- Including the cities of Warrenton, Norlina, Burlington, Graham, Mebane, Hillsborough, Chapel Hill, Carrboro, Durham, Rougemont, Louisburg, Franklinton, Siler City, Pittsboro, Raleigh, Cary, Apex, Wake Forest, Knightdale, Sanford, Lillington, Angier, Buies Creek, Erwin, Dunn, Fayetteville, Spring Lake, and Hope Mills 338 PM EDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... * WHAT...Heat index values as high as 105. * WHERE...Franklin, Durham, Warren, Wake, Chatham, Orange, Alamance, Harnett, Cumberland and Lee Counties. * WHEN...Until 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 12:45 PM EDT | Special Weather Statement | RAH | Harnett | 60 min |
| Aug 10, 5:04 PM EDT | Special Weather Statement | RAH | Stanly | 56 min |
| Aug 10, 5:07 PM EDT | Special Weather Statement | RAH | Guilford | 53 min |
| Aug 10, 5:22 PM EDT | Special Weather Statement | RAH | Anson, Richmond | 53 min |
| Aug 10, 5:23 PM EDT | Special Weather Statement | RAH | Lee, Moore | 52 min |
| Aug 10, 5:39 PM EDT | Severe Thunderstorm Warning | RAH | Anson, Montgomery, Richmond | 51 min |
| Aug 10, 6:16 PM EDT | Special Weather Statement | RAH | Moore | 44 min |
| Aug 10, 6:28 PM EDT | Special Weather Statement | RAH | Richmond | 62 min |
| Aug 10, 6:36 PM EDT | Severe Thunderstorm Warning | RAH | Anson, Richmond | 39 min |
Nearby
Heat Advisories in North Carolina, 2021Every heat advisory 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.