Alert archive / Delaware / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 410, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 1, 2019, 12:10 AM EDT for Sussex County, Delaware. It was in force for 95 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
- Nov 1, 2019, 12:10 AM EDT (04:10 UTC)
- Expired
- Nov 1, 2019, 1:45 AM EDT
- In force
- 95 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 5 km from the middle of the area, began a volume at 04:12 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 1, 12:20 AM EDT | TSTM WND DMG | 2 Sse Houston, DE | SEVERAL TREES SNAPPED NEAR A RESIDENCE. TIME ESTIMATED FROM 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 00:00Z, 4.2 hours before the alert went out and 102 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.
- Mixed-layer CAPE
- 9 J/kg
- Mixed-layer CIN
- -279 J/kg
- Mixed-layer LCL
- 933 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 262 m²/s²
- 0-3 km storm-relative helicity
- 301 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
045
WUUS51 KPHI 010410
SVRPHI
DEC005-010545-
/O.NEW.KPHI.SV.W.0410.191101T0410Z-191101T0545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1210 AM EDT Fri Nov 1 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
* Until 145 AM EDT.
* At 1210 AM EDT, severe thunderstorms were located along a line
extending from near Viola to 9 miles southwest of Vienna, moving
northeast at 65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Lewes, Milton,
Selbyville, Bridgeville, Delmar, Dagsboro, Millville, Ellendale,
Bowers, Henlopen Acres, Gumboro, Cape Henlopen State Park,
Sycamore, Big Stone Beach and Long Neck.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.
&&
LAT...LON 3846 7569 3883 7572 3884 7555 3890 7549
3892 7541 3896 7539 3895 7532 3901 7533
3907 7541 3910 7540 3913 7534 3876 7486
3845 7483
TIME...MOT...LOC 0410Z 239DEG 56KT 3904 7551 3840 7598
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
Iovino1 follow-up statement
318
WWUS51 KPHI 010452
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1252 AM EDT Fri Nov 1 2019
DEC005-010545-
/O.CON.KPHI.SV.W.0410.000000T0000Z-191101T0545Z/
Sussex DE-
1252 AM EDT Fri Nov 1 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 AM EDT
FOR EASTERN SUSSEX COUNTY...
At 1251 AM EDT, severe thunderstorms were located along a line
extending from 6 miles northwest of North Cape May to near
Parsonsburg, moving northeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Millsboro, Lewes, Milton, Selbyville, Delmar, Dagsboro,
Millville, Henlopen Acres, Gumboro, Cape Henlopen State Park,
Sycamore, Long Neck, Ocean View, Frankford, South Bethany and Dewey
Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.
&&
LAT...LON 3846 7562 3901 7518 3876 7486 3845 7483
TIME...MOT...LOC 0451Z 238DEG 48KT 3904 7504 3846 7547
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 11:15 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 60 min |
| Oct 31, 11:28 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 62 min |
| Nov 1, 9:12 AM EDT | Freeze Warning | PHI | Kent, New Castle, Sussex | 25 hr |
Nearby
Severe Thunderstorm Warnings in Delaware, 2019Every severe thunderstorm warning in 2019
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.