Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 135, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2009, 10:29 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 61 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
- Jul 25, 2009, 10:29 PM EDT (02:29 UTC)
- Expired
- Jul 25, 2009, 11:30 PM EDT
- In force
- 61 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, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 11 km from the middle of the area, began a volume at 02:31 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 |
|---|---|---|---|
| Jul 25, 10:48 PM EDT | TSTM WND DMG | Dover, DE | SEVERAL TREES DOWN ACROSS ROAD AND DOWNED WIRES WEST OF DOVER. |
| Jul 25, 10:48 PM EDT | TSTM WND DMG | Dover Base Housing, DE | SEVERAL TREES DOWN ACROSS ROAD AND DOWNED WIRES WEST OF DOVER. |
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 00:00Z, 2.5 hours before the alert went out and 95 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
- 982 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 260229
SVRPHI
DEC001-005-MDC011-035-041-260330-
/O.NEW.KPHI.SV.W.0135.090726T0229Z-090726T0330Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1029 PM EDT SAT JUL 25 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
KENT COUNTY IN CENTRAL DELAWARE...
THIS INCLUDES THE CITY OF DOVER...
CAROLINE COUNTY IN EASTERN MARYLAND...
SOUTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
EAST CENTRAL QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
SUSSEX COUNTY IN SOUTHERN DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 1130 PM EDT
* AT 1028 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTH OF GOLDSBORO TO
PRESTON TO 27 MILES SOUTH OF WINDYHILL...OR ALONG A LINE EXTENDING
FROM 17 MILES WEST OF DOVER TO 12 MILES SOUTHEAST OF EASTON TO 26
MILES WEST OF SALISBURY...AND MOVING EAST AT 35 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
AGNER AND GOLDSBORO AROUND 1035 PM EDT...
HARTLY...SMITHVILLE...SANDTOWN AND FEDERALSBURG AROUND 1040 PM
EDT...
HAZLETTVILLE AROUND 1045 PM EDT...
ANDREWSVILLE AROUND 1050 PM EDT...
CHESWOLD AND DOVER SPEEDWAY AROUND 1055 PM EDT...
LAT...LON 3846 7570 3865 7572 3869 7583 3867 7595
3860 7598 3857 7604 3867 7599 3915 7591
3933 7544 3924 7538 3907 7539 3898 7529
3893 7530 3880 7516 3880 7507 3847 7503
3844 7505
TIME...MOT...LOC 0228Z 254DEG 30KT 3912 7582 3869 7586
3830 7607
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 44 min |
| Jul 26, 7:05 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 70 min |
| Jul 25, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 64 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.