Alert archive / Delaware / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 134, NWS Philadelphia/Mount Holly

July 21, 2022Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2022, 4:37 PM EDT for Sussex County, Delaware. It was in force for 58 min. 4 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 21, 2022, 4:37 PM EDT (20:37 UTC)
Expired: Jul 21, 2022, 5:35 PM EDT
In force: 58 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), 15 km from the middle of the area, began a volume at 20:36 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 21, 4:40 PM EDT	TSTM WND DMG	2 W Seaford, DE	REPORT OF TREES AND WIRES DOWN ON A VEHICLE ON DULANEY STREET IN SEAFORD, DE. TIME ESTIMATED VIA RADAR.
Jul 21, 4:45 PM EDT	TSTM WND DMG	Seaford, DE	NUMEROUS DOWNED WIRES IN BLADES AND SEAFORD, DE. TIME ESTIMATED VIA RADAR.
Jul 21, 4:50 PM EDT	TSTM WND DMG	3 Ene Seaford, DE	TREES ON HOME AT CORNER OF CONCORD POND ROAD AND CONCORD ROAD IN SEAFORD. TIME ESTIMATED VIA RADAR.
Jul 21, 5:04 PM EDT	TSTM WND DMG	2 Ese Harbeson, DE	REPORT OF LARGE TREES SNAPPED AND DIME SIZED HAIL ON STOCKLEY ROAD IN MILTON, DE. TIME ESTIMATED VIA RADAR.

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.6 hours before the alert went out and 84 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: 1195 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

417 
WUUS51 KPHI 212037
SVRPHI
DEC005-212145-
/O.NEW.KPHI.SV.W.0134.220721T2037Z-220721T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
437 PM EDT Thu Jul 21 2022

The National Weather Service in Mount Holly NJ has issued a

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

* Until 545 PM EDT.

* At 437 PM EDT, a severe thunderstorm was located near Seaford, or
  10 miles east of Hurlock, moving east at 40 mph.

  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, Seaford, Millsboro, Laurel, Lewes, Milton, Bridgeville,
  Dagsboro, Henlopen Acres, Cape Henlopen State Park, Sycamore, Long
  Neck, Blades, Dewey Beach and Bethel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3875 7571 3886 7508 3856 7503 3852 7570
TIME...MOT...LOC 2037Z 259DEG 35KT 3862 7567 

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

$$
Manning

4 follow-up statements

219 
WWUS51 KPHI 212058
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
458 PM EDT Thu Jul 21 2022

DEC005-212145-
/O.CON.KPHI.SV.W.0134.000000T0000Z-220721T2145Z/
Sussex DE-
458 PM EDT Thu Jul 21 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR CENTRAL SUSSEX COUNTY...

At 457 PM EDT, a severe thunderstorm was located over Sycamore, or 8 
miles southwest of Georgetown, moving east at 35 mph. An additional 
severe thunderstorm just east of Georgetown, was also moving east at 
35 mph. 

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, Millsboro, Laurel, Lewes, Milton, Henlopen Acres,
Sycamore, Cape Henlopen State Park, Long Neck and Dewey Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.

&&

LAT...LON 3874 7558 3886 7508 3856 7503 3855 7558
TIME...MOT...LOC 2057Z 261DEG 29KT 3862 7552 

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

$$
Manning

300 
WWUS51 KPHI 212116
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
516 PM EDT Thu Jul 21 2022

DEC005-212145-
/O.CON.KPHI.SV.W.0134.000000T0000Z-220721T2145Z/
Sussex DE-
516 PM EDT Thu Jul 21 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...

At 516 PM EDT, severe thunderstorms were located along a line
extending from near Lewes to near Millsboro, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Georgetown, Millsboro, Lewes, Milton, Henlopen Acres, Cape Henlopen
State Park, Long Neck and Dewey Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3874 7544 3886 7508 3856 7503 3856 7541
TIME...MOT...LOC 2116Z 264DEG 24KT 3872 7518 3863 7535 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$
Manning

790 
WWUS51 KPHI 212124
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
524 PM EDT Thu Jul 21 2022

DEC005-212145-
/O.CON.KPHI.SV.W.0134.000000T0000Z-220721T2145Z/
Sussex DE-
524 PM EDT Thu Jul 21 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EAST CENTRAL SUSSEX COUNTY...

At 523 PM EDT, a severe thunderstorm was located over Henlopen Acres,
or 14 miles east of Georgetown, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lewes, Henlopen Acres, Cape Henlopen State Park, Long Neck and Dewey
Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3880 7525 3886 7508 3876 7506 3863 7504
      3861 7523
TIME...MOT...LOC 2123Z 263DEG 20KT 3872 7512 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$
Manning

283 
WWUS51 KPHI 212135
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
535 PM EDT Thu Jul 21 2022

DEC005-212144-
/O.CAN.KPHI.SV.W.0134.000000T0000Z-220721T2145Z/
Sussex DE-
535 PM EDT Thu Jul 21 2022

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SUSSEX COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However gusty winds are still possible with this
thunderstorm.

LAT...LON 3880 7525 3886 7508 3876 7506 3863 7504
      3861 7523
TIME...MOT...LOC 2131Z 259DEG 35KT 3874 7497 

$$
Manning

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 4:20 PM EDT	Special Weather Statement	PHI	Sussex	25 min
Jul 21, 7:53 PM EDT	Special Weather Statement	PHI	Sussex	37 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.