Alert archive / Delaware / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 211, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2008, 10:21 AM EDT for New Castle County, Delaware. It was in force for 54 min. 2 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
- Aug 10, 2008, 10:21 AM EDT (14:21 UTC)
- Expired
- Aug 10, 2008, 11:15 AM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County New Castle County, DE
The radar
The Dover AFB radar (KDOX), 96 km from the middle of the area, began a volume at 14:21 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 |
|---|---|---|---|
| Aug 10, 10:40 AM EDT | HAIL 0.75 | Wilmington Manor, DE | |
| Aug 10, 10:40 AM EDT | HAIL 1 | Wilmington Manor, DE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 2.4 hours before the alert went out and 178 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
- 771 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 101421
SVRPHI
DEC003-101515-
/O.NEW.KPHI.SV.W.0211.080810T1421Z-080810T1515Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1021 AM EDT SUN AUG 10 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
* UNTIL 1115 AM EDT
* AT 1016 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. THIS
STORM WAS LOCATED NEAR NEW CASTLE...OR ABOUT NEAR WILMINGTON...AND
MOVING NORTHEAST AT 19 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
WILMINGTON BY 1030 AM...
TALLEYVILLE BY 1040 AM...
LAT...LON 3984 7559 3979 7541 3976 7547 3972 7547
3965 7556 3965 7559 3962 7560 3960 7557
3958 7558 3960 7559 3960 7561 3968 7570
TIME...MOT...LOC 1421Z 212DEG 17KT 3969 7554
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 11:46 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 59 min |
| Aug 10, 12:03 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 57 min |
| Aug 10, 12:09 PM EDT | Tornado Warning | PHI | New Castle | 36 min |
| Aug 10, 12:40 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 95 min |
| Aug 10, 5:45 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 75 min |
| Aug 10, 5:59 PM EDT | Areal Flood Advisory | PHI | New Castle | 2 hr |
| Aug 10, 6:36 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 69 min |
| Aug 10, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 66 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2008Every severe thunderstorm warning in 2008
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.