Alert archive / Delaware / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 33, NWS Philadelphia/Mount Holly

May 22, 2014Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 22, 2014, 6:13 PM EDT for Sussex County, Delaware. It was in force for 32 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 22, 2014, 6:13 PM EDT (22:13 UTC)
Expired: May 22, 2014, 6:45 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 43 km from the middle of the area, began a volume at 22:15 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 22, 2:18 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.2 hours before the alert went out and 66 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: 413 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1075 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

261 
WUUS51 KPHI 222213
SVRPHI
DEC005-222245-
/O.NEW.KPHI.SV.W.0033.140522T2213Z-140522T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
613 PM EDT THU MAY 22 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...

* UNTIL 645 PM EDT

* AT 610 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR FRANKFORD...MOVING
  SOUTHEAST AT 30 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH
  DIAMETER HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FENWICK ISLAND AROUND 625 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.
 
&&

LAT...LON 3854 7535 3857 7506 3849 7503 3845 7504
      3845 7505 3845 7530
TIME...MOT...LOC 2213Z 337DEG 28KT 3849 7522

$$

TFG

1 follow-up statement

251 
WWUS51 KPHI 222237
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
637 PM EDT THU MAY 22 2014

DEC005-222247-
/O.CAN.KPHI.SV.W.0033.000000T0000Z-140522T2245Z/
SUSSEX DE-
637 PM EDT THU MAY 22 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY IS
CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA INTO MARYLAND...THEREFORE THE SEVERE THUNDERSTORM WARNING
HAS BEEN CANCELLED.

LAT...LON 3854 7535 3857 7506 3849 7503 3845 7504
      3845 7505 3845 7530
TIME...MOT...LOC 2237Z 337DEG 28KT 3832 7513

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 3:49 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	56 min
May 22, 4:13 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	62 min
May 22, 4:22 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	53 min
May 22, 4:29 PM EDT	Tornado Warning	PHI	Kent	31 min
May 22, 4:53 PM EDT	Tornado Warning	PHI	Kent	22 min
May 22, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	64 min
May 22, 5:43 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	62 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2014 Every severe thunderstorm warning in 2014

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.