Alert archive / New Jersey / Excessive Heat Watches in 2008

Excessive Heat Watch 1, NWS Philadelphia/Mount Holly

June 5, 200816 counties in New Jersey; 5 counties in Pennsylvania; 5 counties in Maryland

NWS Philadelphia/Mount Holly issued this excessive heat watch at Jun 5, 2008, 4:34 AM EDT for 16 counties in New Jersey; 5 counties in Pennsylvania; 5 counties in Maryland. It took effect at Jun 7, 2008, 3:35 PM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jun 5, 2008, 4:34 AM EDT (08:34 UTC)
In effect from: Jun 7, 2008, 3:35 PM EDT
Expired: Jun 8, 2008, 3:47 AM EDT
In force: 12 hr
Issued by: NWS Philadelphia/Mount Holly

All 26 counties

Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Delaware County, PA, Lehigh County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 08:34 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 8.6 hours before the alert went out and 224 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: 225 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1210 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this excessive heat watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this excessive heat watch went out at Jun 5, 3:00 AM EDT, 1 hour 34 minutes earlier.

Area forecast discussion, Jun 5, 3:00 AM EDT, 1 hour 34 minutes before

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Hazardous weather outlook, Jun 4, 11:07 PM EDT, 5 hours 27 minutes before

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The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 9:20 PM EDT	Special Marine Warning	PHI		85 min
Jun 4, 10:01 PM EDT	Areal Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	4 hr
Jun 4, 10:15 PM EDT	River Flood Warning	PHI	Bucks	8 hr
Jun 4, 8:28 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	62 min
Jun 4, 8:50 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	44 min
Jun 4, 9:51 PM EDT	Areal Flood Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	4 hr

Nearby

Excessive Heat Watches in New Jersey, 2008 Excessive Heat Watches in Pennsylvania, 2008 Excessive Heat Watches in Maryland, 2008 Every excessive heat watch in 2008

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.