Alert archive / Delaware / Areal Flood Advisories in 2018
Areal Flood Advisory 137, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 21, 2018, 3:03 PM EDT for Kent County, Sussex County, Delaware. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 21, 2018, 3:03 PM EDT (19:03 UTC)
- Expired
- Jul 21, 2018, 7:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.1 hours before the alert went out and 171 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
- 66 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at Jul 21, 11:39 AM EDT, 3 hours 24 minutes earlier.
Area forecast discussion, Jul 21, 11:39 AM EDT, 3 hours 24 minutes before
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</html>Hazardous weather outlook, Jul 21, 12:48 PM EDT, 2 hours 15 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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Please try again in a few minutes.
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</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 8:52 PM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 48 hr |
| Jul 21, 5:25 AM EDT | Coastal Flood Advisory | PHI | Cumberland, Salem | 15 hr |
| Jul 21, 3:41 PM EDT | Wind Advisory | PHI | Middlesex, Monmouth, Ocean | 12 hr |
Nearby
Areal Flood Advisories in Delaware, 2018Every areal flood advisory in 2018
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.