Alert archive / North Carolina / Heat Advisories in 2021
Heat Advisory 2, NWS Wilmington, NC
NWS Wilmington, NC issued this heat advisory at Jul 31, 2021, 3:13 AM EDT for 4 counties in North Carolina; 4 counties in South Carolina. It took effect at Jul 31, 2021, 11:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jul 31, 2021, 3:13 AM EDT (07:13 UTC)
- In effect from
- Jul 31, 2021, 11:00 AM EDT
- Expired
- Jul 31, 2021, 7:00 PM EDT
- In force
- 8 hr
- Issued by
- NWS Wilmington, NC
Counties Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 30 km from the middle of the area, began a volume at 07:15 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
Charleston AFB, SC (KCHS), launched 00:00Z, 7.2 hours before the alert went out and 169 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
- 3541 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 931 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
733 WWUS72 KILM 310713 NPWILM URGENT - WEATHER MESSAGE National Weather Service Wilmington NC 313 AM EDT Sat Jul 31 2021 NCZ099-109-110-SCZ054>056-058-059-311515- /O.NEW.KILM.HT.Y.0002.210731T1500Z-210731T2300Z/ Columbus-Inland Brunswick-Coastal Brunswick-Coastal Horry- Inland Georgetown-Coastal Georgetown-Central Horry-Northern Horry- Including the cities of Whiteville, Tabor City, Chadbourn, Lake Waccamaw, Boiling Spring Lakes, Leland, Shallotte, Oak Island, Long Beach, Southport, Sunset Beach, Myrtle Beach, Socastee, North Myrtle Beach, Garden City, Little River, Andrews, Georgetown, Murrells Inlet, Conway, Longs, Bucksport, Loris, Green Sea, and Aynor 313 AM EDT Sat Jul 31 2021 ...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT THIS EVENING... * WHAT...Heat index values up to 107 expected. * WHERE...In South Carolina, Coastal Horry, Inland Georgetown, Coastal Georgetown, Central Horry and Northern Horry Counties. In North Carolina, Columbus, Inland Brunswick and Coastal Brunswick Counties. * WHEN...From 11 AM this morning to 7 PM EDT this evening. * 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. && $$
2 follow-up statements
213 WWUS72 KILM 311345 NPWILM URGENT - WEATHER MESSAGE National Weather Service Wilmington NC 945 AM EDT Sat Jul 31 2021 NCZ105>108-SCZ033-039-312300- /O.EXA.KILM.HT.Y.0002.210731T1500Z-210731T2300Z/ Inland Pender-Coastal Pender-Inland New Hanover- Coastal New Hanover-Marion-Williamsburg- Including the cities of Burgaw, Surf City, Wilmington, Masonboro, Myrtle Grove, Ogden, Carolina Beach, Seagate, Marion, Mullins, and Kingstree 945 AM EDT Sat Jul 31 2021 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING... * WHAT...Heat index values up to 106 expected. * WHERE...In South Carolina, Marion and Williamsburg Counties. In North Carolina, Inland Pender, Coastal Pender, Inland New Hanover and Coastal New Hanover Counties. * WHEN...From 11 AM this morning to 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NCZ099-109-110-SCZ054>056-058-059-312300- /O.CON.KILM.HT.Y.0002.210731T1500Z-210731T2300Z/ Columbus-Inland Brunswick-Coastal Brunswick-Coastal Horry- Inland Georgetown-Coastal Georgetown-Central Horry-Northern Horry- Including the cities of Whiteville, Tabor City, Chadbourn, Lake Waccamaw, Boiling Spring Lakes, Leland, Shallotte, Oak Island, Long Beach, Southport, Sunset Beach, Myrtle Beach, Socastee, North Myrtle Beach, Garden City, Little River, Andrews, Georgetown, Murrells Inlet, Conway, Longs, Bucksport, Loris, Green Sea, and Aynor 945 AM EDT Sat Jul 31 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... * WHAT...Heat index values up to 107 expected. * WHERE...In South Carolina, Coastal Horry, Inland Georgetown, Coastal Georgetown, Central Horry and Northern Horry Counties. In North Carolina, Columbus, Inland Brunswick and Coastal Brunswick Counties. * WHEN...From 11 AM this morning to 7 PM EDT this evening. * 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. && $$
885 WWUS72 KILM 312301 NPWILM URGENT - WEATHER MESSAGE National Weather Service Wilmington NC 701 PM EDT Sat Jul 31 2021 NCZ099-105>110-SCZ033-039-054>056-058-059-010015- /O.EXP.KILM.HT.Y.0002.000000T0000Z-210731T2300Z/ Columbus-Inland Pender-Coastal Pender-Inland New Hanover- Coastal New Hanover-Inland Brunswick-Coastal Brunswick-Marion- Williamsburg-Coastal Horry-Inland Georgetown-Coastal Georgetown- Central Horry-Northern Horry- Including the cities of Whiteville, Tabor City, Chadbourn, Lake Waccamaw, Burgaw, Surf City, Wilmington, Masonboro, Myrtle Grove, Ogden, Carolina Beach, Seagate, Boiling Spring Lakes, Leland, Shallotte, Oak Island, Long Beach, Southport, Sunset Beach, Marion, Mullins, Kingstree, Myrtle Beach, Socastee, North Myrtle Beach, Garden City, Little River, Andrews, Georgetown, Murrells Inlet, Conway, Longs, Bucksport, Loris, Green Sea, and Aynor 701 PM EDT Sat Jul 31 2021 ...HEAT ADVISORY HAS EXPIRED... Heat indices have dropped below the 105 degree threshold and as a result, the Heat Advisory has been allowed to expire at 7 PM EDT. $$ dch
The office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 3:07 PM EDT | Small Craft Advisory | ILM | 35 hr | |
| Jul 31, 6:34 PM EDT | Special Weather Statement | ILM | Pender | 56 min |
| Jul 31, 6:55 PM EDT | Severe Thunderstorm Warning | ILM | Brunswick, Columbus | 35 min |
| Jul 31, 3:59 PM EDT | Areal Flood Advisory | ILM | Georgetown | 37 min |
| Jul 31, 5:25 PM EDT | Special Weather Statement | ILM | Georgetown | 65 min |
Nearby
Heat Advisories in North Carolina, 2021Heat Advisories in South 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.