Alert archive / Delaware / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 22, 2010, 8:29 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Maryland. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 22, 2010, 8:29 PM EDT (00:29 UTC)
- Expired
- Jun 22, 2010, 9:15 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 22 km from the middle of the area, began a volume at 00:30 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.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.5 hours before the alert went out and 119 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
- 796 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1216 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 5.1
The text
As transmitted, in the capitals the NWS used until 2016.
631
WUUS51 KPHI 230029
SVRPHI
DEC001-005-MDC011-035-230115-
/O.NEW.KPHI.SV.W.0068.100623T0029Z-100623T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
829 PM EDT TUE JUN 22 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
NORTHEASTERN CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
NORTH CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 915 PM EDT
* AT 824 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
HARTLY...OR 14 MILES WEST OF DOVER...AND MOVING SOUTHEAST AT 30
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SANDTOWN AND HAZLETTVILLE AROUND 835 PM EDT...
WOODSIDE AND 7 MILES SOUTHWEST OF CAMDEN AROUND 845 PM EDT...
VIOLA AND 8 MILES SOUTHWEST OF RISING SUN AROUND 850 PM EDT...
HARRINGTON AROUND 900 PM EDT...
9 MILES SOUTHWEST OF BOWERS AROUND 905 PM EDT...
MILFORD AND 7 MILES NORTH OF ELLENDALE AROUND 915 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 GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND
SOUTHERN NEW JERSEY.
&&
LAT...LON 3874 7540 3899 7570 3907 7577 3912 7583
3922 7576 3911 7541 3895 7532
TIME...MOT...LOC 0029Z 306DEG 24KT 3909 7573
$$
DRAG1 follow-up statement
833
WWUS51 KPHI 230103
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
903 PM EDT TUE JUN 22 2010
MDC011-035-230113-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-100623T0115Z/
CAROLINE MD-QUEEN ANNE'S MD-
903 PM EDT TUE JUN 22 2010
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S AND
NORTHEASTERN CAROLINE COUNTIES IS CANCELLED...
LAT...LON 3898 7566 3901 7568 3907 7567 3909 7558
3909 7549 3895 7532 3874 7540
TIME...MOT...LOC 0103Z 303DEG 16KT 3902 7559
$$
DEC001-005-230115-
/O.CON.KPHI.SV.W.0068.000000T0000Z-100623T0115Z/
KENT DE-SUSSEX DE-
903 PM EDT TUE JUN 22 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTH CENTRAL SUSSEX AND SOUTHERN KENT COUNTIES...
AT 858 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR VIOLA...OR 10 MILES SOUTHWEST OF DOVER...MOVING
SOUTHEAST AT 20 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
RIVERVIEW BY 910 PM EDT...
FREDERICA...HOUSTON...HARRINGTON AND 6 MILES SOUTHWEST OF MAGNOLIA
BY 915 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.
&&
LAT...LON 3898 7566 3901 7568 3907 7567 3909 7558
3909 7549 3895 7532 3874 7540
TIME...MOT...LOC 0103Z 303DEG 16KT 3902 7559
$$
DRAGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 8:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 30 min |
| Jun 22, 8:14 PM EDT | Special Weather Statement | PHI | Kent, New Castle | 61 min |
| Jun 22, 9:33 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 27 min |
| Jun 22, 9:46 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 59 min |
| Jun 22, 10:36 PM EDT | Special Weather Statement | PHI | Sussex | 54 min |
| Jun 22, 10:49 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 41 min |
| Jun 22, 11:51 PM EDT | Special Weather Statement | PHI | Sussex | 54 min |
| Jun 23, 12:58 AM EDT | Special Weather Statement | PHI | Sussex | 92 min |
| Jun 22, 9:12 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 18 min |
| Jun 22, 9:39 PM EDT | Special Weather Statement | PHI | Caroline | 66 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2010Severe Thunderstorm Warnings in Maryland, 2010Every severe thunderstorm warning in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.