Alert archive / Delaware / Tornado Warnings in 2023

Tornado Warning 29, NWS Philadelphia/Mount Holly

July 29, 2023Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2023, 6:18 PM EDT for Sussex County, Delaware. It was in force for 27 min. 1 report 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 29, 2023, 6:18 PM EDT (22:18 UTC)
Expired: Jul 29, 2023, 6:45 PM EDT
In force: 27 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 9 km from the middle of the area, began a volume at 22:19 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 29, 6:20 PM EDT	TSTM WND GST 48	2 Sse Greenwood, DE	Wunderground station KDEGREEN1.

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 29, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.3 hours before the alert went out and 95 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: 245 J/kg
Mixed-layer CIN: -215 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

909 
WFUS51 KPHI 292218
TORPHI
DEC005-292245-
/O.NEW.KPHI.TO.W.0029.230729T2218Z-230729T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
618 PM EDT Sat Jul 29 2023

The National Weather Service in Mount Holly NJ has issued a

* Tornado Warning for...
  Northwestern Sussex County in southern Delaware...

* Until 645 PM EDT.
    
* At 617 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Bridgeville, or 11 miles northwest of Georgetown,
  moving east at 40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Bridgeville, Ellendale and Greenwood. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3875 7564 3881 7564 3888 7534 3871 7534
TIME...MOT...LOC 2217Z 269DEG 36KT 3878 7556 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Staarmann

2 follow-up statements

029 
WWUS51 KPHI 292225
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
625 PM EDT Sat Jul 29 2023

DEC005-292245-
/O.CON.KPHI.TO.W.0029.000000T0000Z-230729T2245Z/
Sussex DE-
625 PM EDT Sat Jul 29 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
NORTHWESTERN SUSSEX COUNTY...
    
At 624 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Ellendale, or 9 miles northwest of Georgetown,
moving east at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Ellendale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3874 7557 3882 7558 3888 7534 3871 7534
TIME...MOT...LOC 2224Z 263DEG 35KT 3880 7548 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Staarmann

133 
WWUS51 KPHI 292236 RRA
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
636 PM EDT Sat Jul 29 2023

DEC005-292245-
/O.EXP.KPHI.TO.W.0029.000000T0000Z-230729T2245Z/
Sussex DE-
636 PM EDT Sat Jul 29 2023

...THE TORNADO WARNING FOR NORTHWESTERN SUSSEX COUNTY WILL EXPIRE AT
645 PM EDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.  However
gusty winds and heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern Delaware.

Remember, a Severe Thunderstorm Warning still remains in effect for
Sussex County until 715 PM EDT.

LAT...LON 3874 7557 3882 7558 3888 7534 3871 7534
TIME...MOT...LOC 2235Z 269DEG 36KT 3880 7535 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:04 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	41 min
Jul 28, 8:33 PM EDT	Special Weather Statement	PHI	New Castle	42 min
Jul 28, 10:07 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	38 min
Jul 28, 10:44 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	31 min
Jul 28, 11:00 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	60 min
Jul 28, 11:33 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	27 min
Jul 28, 11:59 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	31 min
Jul 29, 12:12 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	36 min
Jul 29, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	50 min
Jul 29, 5:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	60 min
Jul 29, 5:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, New Castle	46 min
Jul 29, 6:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Kent, Sussex	75 min
Jul 29, 6:26 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	49 min

Nearby

Tornado Warnings in Delaware, 2023 Every tornado warning in 2023 Tornadoes in 2023

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.