Alert archive / Maryland / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 170, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 27, 2010, 9:06 PM EDT for Caroline County, Talbot County, Maryland; Sussex County, Delaware. It was in force for 54 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
- Oct 27, 2010, 9:06 PM EDT (01:06 UTC)
- Expired
- Oct 27, 2010, 10:00 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Sussex County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 43 km from the middle of the area, began a volume at 01:07 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, 1.1 hours before the alert went out and 88 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
- 660 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
707
WUUS51 KPHI 280106
SVRPHI
DEC005-MDC011-041-280200-
/O.NEW.KPHI.SV.W.0170.101028T0106Z-101028T0200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
906 PM EDT WED OCT 27 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
SOUTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
WESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 1000 PM EDT
* AT 901 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED 8 MILES SOUTH OF TRAPPE...OR
15 MILES SOUTH OF EASTON...AND MOVING EAST NORTHEAST AT 35 TO
40 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
6 MILES SOUTH OF WINDYHILL AROUND 915 PM EDT...
6 MILES SOUTH OF CHOPTANK AROUND 920 PM EDT...
FEDERALSBURG AROUND 935 PM EDT...
SEAFORD AROUND 945 PM EDT...
BRIDGEVILLE AROUND 950 PM EDT...
GEORGETOWN AROUND 1000 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 3865 7572 3869 7583 3867 7595 3860 7598
3856 7604 3857 7607 3860 7607 3861 7609
3861 7611 3866 7617 3887 7541 3860 7530
3852 7571
TIME...MOT...LOC 0105Z 253DEG 31KT 3857 7606
$$
RPW1 follow-up statement
339
WWUS51 KPHI 280135
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
935 PM EDT WED OCT 27 2010
MDC041-280144-
/O.CAN.KPHI.SV.W.0170.000000T0000Z-101028T0200Z/
TALBOT MD-
935 PM EDT WED OCT 27 2010
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TALBOT COUNTY IS
CANCELLED...
LAT...LON 3865 7572 3868 7579 3875 7580 3887 7541
3860 7530 3852 7571
TIME...MOT...LOC 0134Z 253DEG 31KT 3869 7572
$$
DEC005-MDC011-280200-
/O.CON.KPHI.SV.W.0170.000000T0000Z-101028T0200Z/
CAROLINE MD-SUSSEX DE-
935 PM EDT WED OCT 27 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR WESTERN SUSSEX AND SOUTHEASTERN CAROLINE COUNTIES...
AT 932 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR FEDERALSBURG...OR 19
MILES WEST OF GEORGETOWN...MOVING EAST NORTHEAST AT 35 TO 40 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
SEAFORD AND BLADES BY 940 PM EDT...
BRIDGEVILLE BY 945 PM EDT...
6 MILES SOUTH OF GREENWOOD BY 950 PM EDT...
ELLENDALE AND GEORGETOWN BY 1000 PM EDT...
LAT...LON 3865 7572 3868 7579 3875 7580 3887 7541
3860 7530 3852 7571
TIME...MOT...LOC 0134Z 253DEG 31KT 3869 7572
$$
RPWThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 27, 8:37 PM EDT | Special Weather Statement | PHI | Talbot | 53 min |
| Oct 27, 10:48 PM EDT | Special Weather Statement | PHI | Sussex | 27 min |
| Oct 27, 11:10 PM EDT | Special Weather Statement | PHI | Sussex | 50 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2010Severe Thunderstorm Warnings in Delaware, 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.