Alert archive / Delaware / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 70, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 13, 2009, 4:52 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. 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
- Jun 13, 2009, 4:52 PM EDT (20:52 UTC)
- Expired
- Jun 13, 2009, 5:45 PM EDT
- In force
- 53 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 16 km from the middle of the area, began a volume at 20:53 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 |
|---|---|---|---|
| Jun 13, 4:55 PM EDT | TSTM WND DMG | 5 Wnw Farmington, DE | TREES DOWN AND BARN DAMAGE ON HIGH STUMP RD IN HARRINGTON. |
| Jun 13, 5:00 PM EDT | TSTM WND DMG | 3 Wnw Andrewsville, DE | TREES AND WIRES DOWN IN MISPILLION HUNDRED. |
| Jun 13, 5:05 PM EDT | TSTM WND DMG | 2 Se Agner, MD | WIRES DOWN BETWEEN AGNER AND FEDERALSBURG |
| Jun 13, 5:19 PM EDT | TSTM WND DMG | Greenwood, DE | TREES AND WIRES DOWN NEAR GREENWOOD. |
| Jun 13, 5:27 PM EDT | TSTM WND DMG | 2 Ssw Greenwood Lake, DE | NUMEROUS TREES DOWN WITH SEVERAL UPROOTED TREES BETWEEN GREENWOOD AND BRIDGEVILLE ON US ROUTE 13. |
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, 8.9 hours before the alert went out and 104 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
- 844 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 910 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 132052 SVRPHI DEC001-005-MDC011-132145- /O.NEW.KPHI.SV.W.0070.090613T2052Z-090613T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 452 PM EDT SAT JUN 13 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN KENT COUNTY IN CENTRAL DELAWARE... SOUTHEASTERN CAROLINE COUNTY IN EASTERN MARYLAND... WESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE... * UNTIL 545 PM EDT * AT 450 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM THAT HAS PRODUCED PENNY SIZE HAIL...AND DAMAGING WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR DENTON...OR 17 MILES NORTHEAST OF EASTON...AND MOVING SOUTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... 6 MILES NORTHEAST OF AGNER AROUND 505 PM EDT... SMITHVILLE AND ANDREWSVILLE AROUND 510 PM EDT... BRIDGEVILLE AROUND 535 PM EDT... SEAFORD AROUND 545 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 3893 7539 3859 7561 3882 7590 3898 7584 TIME...MOT...LOC 2052Z 314DEG 15KT 3886 7577 $$ TFG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 2:23 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 67 min |
| Jun 13, 2:27 PM EDT | Areal Flood Advisory | PHI | New Castle | 4 hr |
| Jun 13, 3:02 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 58 min |
| Jun 13, 4:50 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Jun 13, 5:21 PM EDT | Tornado Warning | PHI | Sussex | 54 min |
| Jun 13, 4:59 PM EDT | Areal Flood Advisory | PHI | Cecil | 4 hr |
Nearby
Severe Thunderstorm Warnings in Delaware, 2009Severe Thunderstorm Warnings in Maryland, 2009Every severe thunderstorm warning in 2009
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.