Alert archive / Delaware / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 165, NWS Philadelphia/Mount Holly

September 13, 2022Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 13, 2022, 4:08 AM EDT for Sussex County, Delaware. It was in force for 52 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
Sep 13, 2022, 4:08 AM EDT (08:08 UTC)
Expired
Sep 13, 2022, 5:00 AM EDT
In force
52 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 08:12 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, 8.1 hours before the alert went out and 68 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2022-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1453 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2022-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1453 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
809 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

456 
WUUS51 KPHI 130808
SVRPHI
DEC005-130900-
/O.NEW.KPHI.SV.W.0165.220913T0808Z-220913T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
408 AM EDT Tue Sep 13 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southwestern Sussex County in southern Delaware...

* Until 500 AM EDT.

* At 408 AM EDT, a severe thunderstorm was located near Vienna, or 10
  miles northwest of Salisbury, moving northeast at 35 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Georgetown, Laurel, Delmar, Sycamore, Gumboro, Blades and Bethel. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3846 7569 3858 7571 3872 7542 3849 7531
      3845 7546
TIME...MOT...LOC 0808Z 242DEG 30KT 3845 7576 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AKL
2 follow-up statements
316 
WWUS51 KPHI 130840
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
440 AM EDT Tue Sep 13 2022

DEC005-130900-
/O.CON.KPHI.SV.W.0165.000000T0000Z-220913T0900Z/
Sussex DE-
440 AM EDT Tue Sep 13 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM EDT
FOR SOUTH CENTRAL SUSSEX COUNTY...

At 440 AM EDT, a severe thunderstorm was located over Sycamore, or 8
miles southwest of Georgetown, moving northeast at 35 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Sycamore.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3855 7553 3860 7556 3868 7540 3852 7532
      3848 7548
TIME...MOT...LOC 0840Z 242DEG 30KT 3858 7546 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

AKL
052 
WWUS51 KPHI 130852
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
452 AM EDT Tue Sep 13 2022

DEC005-130901-
/O.EXP.KPHI.SV.W.0165.000000T0000Z-220913T0900Z/
Sussex DE-
452 AM EDT Tue Sep 13 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SUSSEX COUNTY
WILL EXPIRE AT 500 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
Southeastern Sussex County until 530 AM EDT.

LAT...LON 3855 7553 3860 7556 3868 7540 3852 7532
      3848 7548
TIME...MOT...LOC 0851Z 242DEG 30KT 3862 7536 

$$

AKL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 12, 8:17 PM EDTSpecial Weather StatementPHISussex28 min
Sep 12, 9:52 PM EDTSpecial Weather StatementPHISussex38 min
Sep 12, 10:16 PM EDTSpecial Weather StatementPHIKent29 min
Sep 13, 4:47 AM EDTSevere Thunderstorm WarningPHISussex43 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2022Every severe thunderstorm warning in 2022

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.