Alert archive / Delaware / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 217, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 8, 2012, 5:22 PM EDT for Kent County, New Castle County, Delaware. It was in force for 53 min. 5 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
- Sep 8, 2012, 5:22 PM EDT (21:22 UTC)
- Expired
- Sep 8, 2012, 6:15 PM EDT
- In force
- 53 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE
The radar
The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 21:22 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 |
|---|---|---|---|
| Sep 8, 5:25 PM EDT | TSTM WND DMG | Marydel, DE | PORCH AND A SHED DAMAGED IN MARYDEL. ALSO TREES DOWN. |
| Sep 8, 5:33 PM EDT | TSTM WND DMG | Smyrna, DE | TREES DOWN |
| Sep 8, 5:38 PM EDT | TSTM WND DMG | Felton, DE | LARGE TREE LIMBS DOWN IN FELTON. |
| Sep 8, 5:43 PM EDT | TSTM WND DMG | Dover, DE | TREES DOWN |
| Sep 8, 5:50 PM EDT | TSTM WND GST 55 | Dover Afb, DE | 55 MPH WIND GUST AT DOVER AFB. |
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 |
|---|---|---|---|
| Sep 8, 12:15 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.4 hours before the alert went out and 134 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
- 718 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 771 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
049
WUUS51 KPHI 082122
SVRPHI
DEC001-003-082215-
/O.NEW.KPHI.SV.W.0217.120908T2122Z-120908T2215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
522 PM EDT SAT SEP 8 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
KENT COUNTY IN CENTRAL DELAWARE...
THIS INCLUDES THE CITY OF DOVER...
SOUTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
* UNTIL 615 PM EDT
* AT 518 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED WEST OF
HARTLY...AND MOVING EAST AT 45 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
DOVER...DOVER SPEEDWAY AND RISING SUN AROUND 540 PM EDT...
8 MILES NORTH OF BOWERS AROUND 550 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS AND CLOUD TO GROUND LIGHTNING. PEOPLE
OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG
BUILDING BUT AWAY FROM WINDOWS.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3885 7573 3950 7577 3963 7561 3960 7560
3954 7555 3946 7558 3926 7539 3907 7539
3900 7532 3895 7530 3895 7539 3892 7541
3890 7549 3884 7556 3884 7572
TIME...MOT...LOC 2121Z 260DEG 50KT 3914 7565
$$
JJM1 follow-up statement
380
WWUS51 KPHI 082147
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
547 PM EDT SAT SEP 8 2012
DEC003-082157-
/O.CAN.KPHI.SV.W.0217.000000T0000Z-120908T2215Z/
NEW CASTLE DE-
547 PM EDT SAT SEP 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN NEW CASTLE COUNTY IS
CANCELLED...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3929 7575 3931 7571 3929 7565 3931 7562
3931 7558 3935 7555 3937 7550 3926 7539
3907 7539 3900 7532 3895 7530 3895 7539
3892 7541 3891 7547 3884 7556 3884 7572
TIME...MOT...LOC 2147Z 260DEG 17KT 3922 7552
$$
DEC001-082215-
/O.CON.KPHI.SV.W.0217.000000T0000Z-120908T2215Z/
KENT DE-
547 PM EDT SAT SEP 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR KENT COUNTY...
AT 548 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR
LEIPSIC...OR NEAR DOVER...MOVING EAST AT 20 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
LITTLE CREEK BY 555 PM EDT...
7 MILES SOUTH OF WOODLAND BEACH BY 600 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3929 7575 3931 7571 3929 7565 3931 7562
3931 7558 3935 7555 3937 7550 3926 7539
3907 7539 3900 7532 3895 7530 3895 7539
3892 7541 3891 7547 3884 7556 3884 7572
TIME...MOT...LOC 2147Z 260DEG 17KT 3922 7552
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 9:15 PM EDT | Rip Current Statement | PHI | Sussex | 23 hr |
| Sep 8, 4:07 PM EDT | Special Weather Statement | PHI | Kent, New Castle | 83 min |
| Sep 8, 6:17 PM EDT | Special Weather Statement | PHI | Sussex | 58 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2012Every severe thunderstorm warning in 2012
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.