Alert archive / Delaware / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

May 14, 2018Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at May 14, 2018, 8:45 PM EDT for Sussex County, Delaware. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 14, 2018, 8:45 PM EDT (00:45 UTC)
Expired: May 14, 2018, 9:15 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 20 km from the middle of the area, began a volume at 00:45 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 00:00Z, 0.8 hours before the alert went out and 82 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: 2 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 1134 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 14, 3:59 PM EDT, 4 hours 46 minutes earlier.

Area forecast discussion, May 14, 3:59 PM EDT, 4 hours 46 minutes before

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Hazardous weather outlook, May 14, 3:59 PM EDT, 4 hours 46 minutes before

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In the hours before

Special weather statement, May 14, 6:57 PM EDT, 1 hour 48 minutes before

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Special weather statement, May 14, 7:42 PM EDT, 1 hour 3 minutes before

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Special weather statement, May 14, 8:45 PM EDT, 0 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
May 15, 3:40 AM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 7 more	21 hr
May 15, 2:49 PM EDT	Special Weather Statement	PHI	Sussex, Warren	56 min
May 15, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	74 min
May 15, 4:24 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	51 min
May 15, 4:41 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren	64 min
May 15, 4:49 PM EDT	Special Marine Warning	PHI		86 min
May 15, 5:22 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	38 min
May 15, 5:31 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	3 hr
May 15, 5:35 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
May 15, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	67 min
May 15, 5:53 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	52 min
May 15, 6:02 PM EDT	Special Marine Warning	PHI		88 min
May 15, 6:10 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Monmouth, Ocean, Salem	4 hr
May 15, 6:12 PM EDT	Special Marine Warning	PHI		63 min
May 15, 6:17 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Cumberland, Gloucester, Ocean	43 min
May 15, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Salem	40 min
May 15, 6:46 PM EDT	Special Weather Statement	PHI	Atlantic, Cumberland, Ocean, Salem	74 min
May 15, 6:58 PM EDT	Areal Flood Advisory	PHI	Salem	4 hr
May 15, 7:14 PM EDT	Special Marine Warning	PHI		91 min
May 15, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Salem	57 min
May 15, 7:30 PM EDT	Special Marine Warning	PHI		90 min
May 15, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	55 min
May 15, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	33 min
May 15, 4:26 PM EDT	Tornado Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	19 min
May 15, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Chester	63 min
May 15, 5:14 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Montgomery	2 hr
May 15, 6:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester	60 min

Nearby

Special Weather Statements in Delaware, 2018 Every special weather statement 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; radar from the NEXRAD Level II archive.