Alert archive / Delaware / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 162, NWS Philadelphia/Mount Holly

August 27, 2022Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 27, 2022, 3:29 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: Aug 27, 2022, 3:29 PM EDT (19:29 UTC)
Expired: Aug 27, 2022, 4:01 PM EDT
In force: 32 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 24 km from the middle of the area, began a volume at 19:28 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 12:00Z, 7.5 hours before the alert went out and 76 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: 1316 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1164 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

653 
WUUS51 KPHI 271929
SVRPHI
DEC005-272015-
/O.NEW.KPHI.SV.W.0162.220827T1929Z-220827T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
329 PM EDT Sat Aug 27 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  South central Sussex County in southern Delaware...

* Until 415 PM EDT.

* At 328 PM EDT, a severe thunderstorm was located over Sycamore, or
  7 miles southwest of Georgetown, and is nearly stationary.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Georgetown and Sycamore. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3855 7537 3856 7554 3871 7554 3868 7525
TIME...MOT...LOC 1928Z 208DEG 3KT 3860 7546 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

2 follow-up statements

488 
WWUS51 KPHI 271945
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
345 PM EDT Sat Aug 27 2022

DEC005-272015-
/O.CON.KPHI.SV.W.0162.000000T0000Z-220827T2015Z/
Sussex DE-
345 PM EDT Sat Aug 27 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTH CENTRAL SUSSEX COUNTY...

At 345 PM EDT, a severe thunderstorm was located near Sycamore, or
near Georgetown, and is nearly stationary.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Georgetown and Sycamore. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3855 7537 3856 7551 3871 7553 3868 7525
TIME...MOT...LOC 1945Z 195DEG 2KT 3861 7542 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Staarmann

854 
WWUS51 KPHI 272001
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
401 PM EDT Sat Aug 27 2022

DEC005-272011-
/O.CAN.KPHI.SV.W.0162.000000T0000Z-220827T2015Z/
Sussex DE-
401 PM EDT Sat Aug 27 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SUSSEX COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3855 7537 3856 7551 3871 7553 3868 7525
TIME...MOT...LOC 1958Z 208DEG 3KT 3862 7541 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 2:15 PM EDT	Special Weather Statement	PHI	Sussex	30 min
Aug 27, 2:52 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Aug 27, 3:11 PM EDT	Special Weather Statement	PHI	Sussex	34 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2022 Every 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.