Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 134, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2009, 9:41 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 64 min. 3 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, 9:41 PM EDT (01:41 UTC)
- Expired
- Jul 25, 2009, 10:45 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 63 km from the middle of the area, began a volume at 01:44 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, 10:00 PM EDT | TSTM WND DMG | Easton, MD | SEVERAL TREES, WIRES, AND TELEPHONE POLES DOWN IN EASTON. |
| Jul 25, 10:05 PM EDT | HAIL 0.75 | Centreville, MD | PENNY TO NICKEL SIZE HAIL REPORTED IN CENTREVILLE. |
| Jul 25, 10:18 PM EDT | TSTM WND DMG | Preston, MD | TREES DOWN ON TRANSFORMER IN PRESTON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.7 hours before the alert went out and 107 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
- 754 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1179 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 260141
SVRPHI
MDC011-035-041-260245-
/O.NEW.KPHI.SV.W.0134.090726T0141Z-090726T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
941 PM EDT SAT JUL 25 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CAROLINE COUNTY IN EASTERN MARYLAND...
TALBOT COUNTY IN EASTERN MARYLAND...
THIS INCLUDES THE CITY OF EASTON...
SOUTHERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
* UNTIL 1045 PM EDT
* AT 941 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
TALBOT...OR 14 MILES WEST OF EASTON...AND MOVING EAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ST. MICHAELS AROUND 950 PM EDT...
COPPERVILLE AROUND 955 PM EDT...
SKIPTON AND WYE MILLS AROUND 1010 PM EDT...
CORDOVA AND STARR AROUND 1020 PM EDT...
QUEEN ANNE AND GRIFFIN AROUND 1025 PM EDT...
JUMPTOWN AROUND 1030 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.
&&
LAT...LON 3868 7619 3866 7621 3873 7625 3872 7632
3883 7631 3887 7626 3883 7620 3894 7624
3890 7624 3893 7628 3884 7636 3885 7637
3899 7634 3898 7621 3907 7604 3912 7576
3868 7572 3869 7590 3858 7603
TIME...MOT...LOC 0141Z 255DEG 24KT 3884 7631
$$
NIERENBERG1 follow-up statement
000
WWUS51 KPHI 260217
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1017 PM EDT SAT JUL 25 2009
MDC011-035-041-260245-
/O.CON.KPHI.SV.W.0134.000000T0000Z-090726T0245Z/
CAROLINE MD-QUEEN ANNES MD-TALBOT MD-
1017 PM EDT SAT JUL 25 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR TALBOT...SOUTHERN QUEEN ANNES AND CAROLINE COUNTIES...
AT 1017 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR MATTHEWS...OR 8 MILES NORTHEAST OF EASTON...MOVING EAST
AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
8 MILES SOUTH OF RIDGELY BY 1025 PM EDT...
DENTON AND 6 MILES NORTH OF AGNER BY 1030 PM EDT...
9 MILES SOUTH OF GREENSBORO BY 1035 PM EDT...
SMITHVILLE BY 1040 PM EDT...
LAT...LON 3868 7619 3866 7621 3873 7625 3872 7632
3883 7631 3887 7626 3883 7620 3894 7624
3890 7624 3893 7628 3884 7636 3885 7637
3899 7634 3898 7621 3907 7604 3912 7576
3868 7572 3869 7590 3858 7603
TIME...MOT...LOC 0217Z 255DEG 24KT 3882 7593
$$
OHARAThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 10:29 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 61 min |
| Jul 26, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 44 min |
| Jul 26, 7:05 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 70 min |
Nearby
Severe 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.