Alert archive / Delaware / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 97, NWS Philadelphia/Mount Holly

July 27, 2005New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2005, 7:04 PM EDT for New Castle County, Delaware. It was in force for 41 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 27, 2005, 7:04 PM EDT (23:04 UTC)
Expired: Jul 27, 2005, 7:45 PM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 93 km from the middle of the area, began a volume at 23:05 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.

What was reported inside it

Time	Report	Where	Remark
Jul 27, 7:20 PM EDT	TSTM WND DMG	New Castle, DE	TREES AND WIRES DOWN ON ROUTE 40.
Jul 27, 7:20 PM EDT	TSTM WND DMG	New Castle, DE	TREES AND WIRES DOWN ON RT. 40.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 27, 1:50 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.1 hours before the alert went out and 43 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: 1105 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KPHI 272305
SVRPHI
DEC003-272345-
/O.NEW.KPHI.SV.W.0097.050727T2304Z-050727T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
704 PM EDT WED JUL 27 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITIES OF...WILMINGTON...NEWARK

* UNTIL 745 PM EDT

* AT 701 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR STANTON...OR
  ABOUT NEAR NEWARK...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STANTON...NEWPORT AND DELAWARE CITY BY 710 PM EDT
  ELSMERE...WILMINGTON MANOR AND NEW CASTLE BY 715 PM EDT
  WILMINGTON AND TALLEYVILLE BY 720 PM EDT
  BELLEFONTE BY 725 PM EDT

LAT...LON 3980 7577 3939 7576 3943 7557 3962 7556
      3983 7546

HEAVY RAIN...HAIL AND GUSTY WINDS ARE POSSIBLE WITH THIS STORM.

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	53 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2005 Every severe thunderstorm warning in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.