Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 9, 2009, 4:19 PM EDT for Kent County, New Castle County, Delaware; Cecil County, Kent County, Queen Anne's County, Maryland. It was in force for 56 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
- Jun 9, 2009, 4:19 PM EDT (20:19 UTC)
- Expired
- Jun 9, 2009, 5:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 72 km from the middle of the area, began a volume at 20:22 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 |
|---|---|---|---|
| Jun 9, 4:57 PM EDT | HAIL 0.25 | 4 Ese Bohemias Mills, DE | PEA SIZE HAIL REPORTED IN MIDDLETOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 32 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
- 1272 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 092019 SVRPHI DEC001-003-MDC015-029-035-092115- /O.NEW.KPHI.SV.W.0061.090609T2019Z-090609T2115Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 419 PM EDT TUE JUN 9 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN KENT COUNTY IN CENTRAL DELAWARE... THIS INCLUDES THE CITY OF DOVER... SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND... THIS INCLUDES THE CITY OF ELKTON... NORTHEASTERN KENT COUNTY IN NORTHEAST MARYLAND... NORTHEASTERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND... SOUTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE... THIS INCLUDES THE CITY OF MIDDLETOWN... * UNTIL 515 PM EDT * AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BRANTWOOD...OR NEAR ELKTON...AND MOVING SOUTH AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CAYOTS AROUND 435 PM EDT... MOUNT PLEASANT AROUND 440 PM EDT... BOHEMIAS MILLS AROUND 450 PM EDT... MIDDLETOWN AROUND 455 PM EDT... WARWICK AROUND 500 PM EDT... SASSAFRAS AROUND 510 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT TUESDAY EVENING FOR NORTHEASTERN PENNSYLVANIA. && LAT...LON 3963 7572 3916 7540 3914 7587 3960 7593 TIME...MOT...LOC 2019Z 342DEG 12KT 3956 7580 $$ NIERENBERG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 8:20 AM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Jun 9, 8:31 AM EDT | Severe Thunderstorm Warning | PHI | Sussex | 59 min |
| Jun 9, 9:09 AM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 3 hr |
| Jun 9, 1:49 PM EDT | Flash Flood Watch | PHI | New Castle | 5 hr |
| Jun 9, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 92 min |
| Jun 9, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 39 min |
| Jun 9, 3:14 PM EDT | Tornado Warning | PHI | Cecil | 46 min |
| Jun 9, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 61 min |
| Jun 9, 5:19 PM EDT | Areal Flood Warning | PHI | Cecil | 71 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2009Severe Thunderstorm Warnings in Delaware, 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.