Alert archive / Maryland / Heat Advisories in 2017
Heat Advisory 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this heat advisory at Jul 14, 2017, 12:06 PM EDT for 4 counties in Maryland; Kent County, Sussex County, Delaware. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2017, 12:06 PM EDT (16:06 UTC)
- Expired
- Jul 14, 2017, 6:42 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 16:07 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 4.1 hours before the alert went out and 119 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
- 908 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 959 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
752 WWUS71 KPHI 141606 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 1206 PM EDT Fri Jul 14 2017 DEZ002-003-MDZ012-015-019-020-150000- /O.NEW.KPHI.HT.Y.0003.170714T1606Z-170715T0000Z/ Kent-Inland Sussex-Kent MD-Queen Annes-Talbot-Caroline- Including the cities of Dover, Georgetown, Chestertown, Centreville, Easton, and Denton 1206 PM EDT Fri Jul 14 2017 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... The National Weather Service in Mount Holly has issued a Heat Advisory, which is in effect until 8 PM EDT this evening. * HEAT INDEX VALUES...Maximum values between 103 and 107 degrees due to temperatures in the lower to middle 90s and dew points in the middle to upper 70s. * TIMING...This afternoon. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. 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 light weight and loose fitting clothing when possible and drink plenty of water. 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. && $$ JRK
2 follow-up statements
887 WWUS71 KPHI 142149 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 549 PM EDT Fri Jul 14 2017 DEZ002-MDZ012-015-142300- /O.CAN.KPHI.HT.Y.0003.000000T0000Z-170715T0000Z/ Kent-Kent MD-Queen Annes- Including the cities of Dover, Chestertown, and Centreville 549 PM EDT Fri Jul 14 2017 ...HEAT ADVISORY IS CANCELLED... The National Weather Service in Mount Holly has cancelled the Heat Advisory. The arrival of cooler air from the storms moving into the area late this afternoon has put an end to the excessive heat. $$ DEZ003-MDZ019-020-150000- /O.CON.KPHI.HT.Y.0003.000000T0000Z-170715T0000Z/ Inland Sussex-Talbot-Caroline- Including the cities of Georgetown, Easton, and Denton 549 PM EDT Fri Jul 14 2017 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * HEAT INDEX VALUES...Maximum values between 103 and 107 degrees due to temperatures around 90 degrees and dew points in the upper 70s to near 80 degrees. * TIMING....The arrival of cooler air from the storms that are approaching from the north will mark the end of excessive heat early this evening. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. 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 light weight and loose fitting clothing when possible and drink plenty of water. 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. && $$ JRK
289 WWUS71 KPHI 142242 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 642 PM EDT Fri Jul 14 2017 DEZ003-MDZ019-020-142345- /O.CAN.KPHI.HT.Y.0003.000000T0000Z-170715T0000Z/ Inland Sussex-Talbot-Caroline- Including the cities of Georgetown, Easton, and Denton 642 PM EDT Fri Jul 14 2017 ...HEAT ADVISORY IS CANCELLED... The National Weather Service in Mount Holly has cancelled the Heat Advisory. After heat indicies topped out around 105 degrees today, rain cooled air has arrived. So the relief from todays earlier heat has started. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 10:03 PM EDT | Special Weather Statement | PHI | Caroline | 27 min |
| Jul 13, 10:15 PM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 4 hr |
| Jul 14, 9:23 AM EDT | Special Weather Statement | PHI | Cecil | 37 min |
| Jul 14, 11:40 AM EDT | Flash Flood Watch | PHI | Cecil, Kent, Queen Anne's | 11 hr |
| Jul 14, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 59 min |
| Jul 14, 2:46 PM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Jul 14, 3:10 PM EDT | Flash Flood Warning | PHI | Cecil | 2 hr |
| Jul 14, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 12 min |
| Jul 14, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 67 min |
| Jul 14, 3:52 PM EDT | Flash Flood Warning | PHI | Talbot | 53 min |
| Jul 14, 3:57 PM EDT | Flash Flood Warning | PHI | Cecil, Kent | 2 hr |
| Jul 14, 4:00 PM EDT | Special Weather Statement | PHI | Caroline | 45 min |
| Jul 14, 4:05 PM EDT | Special Weather Statement | PHI | Kent | 40 min |
| Jul 14, 4:48 PM EDT | Special Weather Statement | PHI | Queen Anne's | 27 min |
| Jul 14, 4:59 PM EDT | Flash Flood Warning | PHI | Queen Anne's | 4 hr |
| Jul 14, 5:27 PM EDT | Special Weather Statement | PHI | Queen Anne's | 63 min |
| Jul 14, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 65 min |
| Jul 14, 5:54 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 51 min |
| Jul 14, 5:58 PM EDT | Flash Flood Warning | PHI | Talbot | 3 hr |
| Jul 14, 6:10 PM EDT | Flash Flood Warning | PHI | Caroline | 3 hr |
| Jul 14, 6:20 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 40 min |
| Jul 13, 8:09 PM EDT | Special Weather Statement | PHI | Kent | 36 min |
| Jul 13, 8:29 PM EDT | Special Weather Statement | PHI | Kent | 31 min |
| Jul 13, 10:39 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 51 min |
| Jul 14, 9:02 AM EDT | Special Weather Statement | PHI | New Castle | 28 min |
| Jul 14, 2:14 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Jul 14, 2:53 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 14, 3:25 PM EDT | Areal Flood Advisory | PHI | New Castle | 4 hr |
| Jul 14, 3:34 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 14, 3:54 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 66 min |
| Jul 14, 5:14 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Jul 14, 5:24 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Jul 14, 5:30 PM EDT | River Flood Warning | PHI | New Castle | 7 hr |
| Jul 14, 5:51 PM EDT | Special Weather Statement | PHI | Sussex | 39 min |
| Jul 14, 6:32 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Jul 14, 6:48 PM EDT | Special Weather Statement | PHI | Sussex | 42 min |
| Jul 14, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 60 min |
Nearby
Heat Advisories in Maryland, 2017Heat Advisories in Delaware, 2017Every heat advisory in 2017
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.