Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Feb 12, 2017, 11:14 PM EST for 4 counties in Maryland; Kent County, Delaware. It was in force for 46 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
- Feb 12, 2017, 11:14 PM EST (04:14 UTC)
- Expired
- Feb 13, 2017, 12:00 AM EST
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 04:17 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 |
|---|---|---|---|
| Feb 12, 11:40 PM EST | TSTM WND GST 45 | Stevensville, MD | |
| Feb 12, 11:52 PM EST | TSTM WND GST 45 | 2 Nw Jumptown, MD | |
| Feb 12, 11:55 PM EST | TSTM WND DMG | Saint Michaels, MD | TREES DOWN IN ST.MICHAELS... CORDOVA AND ROYAL OAK FROM THUNDERSTORM WIND GUSTS. |
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, 4.2 hours before the alert went out and 112 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 854 m above ground
- 0-6 km bulk shear
- 90 kt
- 0-1 km storm-relative helicity
- -382 m²/s²
- 0-3 km storm-relative helicity
- -107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
277
WUUS51 KPHI 130414
SVRPHI
DEC001-MDC011-029-035-041-130500-
/O.NEW.KPHI.SV.W.0002.170213T0414Z-170213T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1114 PM EST SUN FEB 12 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Kent County in central Delaware...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Kent County in northeastern Maryland...
* Until midnight EST
* At 1114 PM EST, severe thunderstorms were located along a line
extending from near Octoraro to near Baltimore to Aspen Hill,
moving east at 60 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Dover, Easton, Centerville, Talbot, Smyrna, Chestertown, Denton,
Centreville, Harrington, Camden, Clayton, Greensboro, Oakland,
Ridgely, Cheswold, Rock Hall, St. Michaels, Church Hill, Millington
and Sudlersville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.
&&
LAT...LON 3904 7631 3898 7628 3900 7617 3913 7625
3934 7616 3938 7578 3929 7576 3929 7565
3936 7546 3887 7556 3871 7624 3876 7623
3869 7634 3885 7627 3879 7619 3894 7621
3897 7625 3892 7630 3897 7635
TIME...MOT...LOC 0414Z 284DEG 54KT 3961 7618 3927 7659 3908 7709
HAIL...<.75IN
WIND...60MPH
$$
jrk2 follow-up statements
695
WWUS51 KPHI 130441
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1141 PM EST SUN FEB 12 2017
DEC001-MDC011-029-035-041-130500-
/O.CON.KPHI.SV.W.0002.000000T0000Z-170213T0500Z/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
1141 PM EST SUN FEB 12 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EST
FOR KENT...NORTHERN TALBOT...QUEEN ANNE'S...CAROLINE AND KENT
COUNTIES...
At 1139 PM EST, severe thunderstorms were located along a line
extending from Warwick to Old Town to near Romancoke, moving east at
65 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated. This line has also had a history of
producing wind damage and gusts near 60 mph in northern
Virginia and in central and southern Maryland.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Dover, Easton, Centerville, Smyrna, Chestertown, Denton, Centreville,
Harrington, Camden, Clayton, Greensboro, Oakland, Ridgely, Cheswold,
Rock Hall, St. Michaels, Church Hill, Millington, Sudlersville and
Goldsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.
&&
LAT...LON 3904 7631 3898 7628 3900 7617 3913 7625
3934 7616 3938 7578 3929 7576 3929 7564
3936 7546 3887 7556 3873 7613 3871 7624
3876 7622 3873 7629 3885 7627 3879 7619
3893 7620 3897 7625 3892 7630 3897 7635
TIME...MOT...LOC 0439Z 284DEG 56KT 3939 7578 3914 7611 3892 7641
HAIL...<.75IN
WIND...60MPH
$$
JRK929
WWUS51 KPHI 130457
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1157 PM EST SUN FEB 12 2017
DEC001-MDC011-029-035-041-130505-
/O.EXP.KPHI.SV.W.0002.000000T0000Z-170213T0500Z/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
1157 PM EST SUN FEB 12 2017
...THE SEVERE THUNDERSTORM WARNING FOR KENT...TALBOT...QUEEN
ANNE'S...CAROLINE AND KENT COUNTIES WILL EXPIRE AT MIDNIGHT EST...
The storms which prompted the warning have moved out most of the
area. Therefore the warning will be allowed to expire. However
gusty winds are still possible with these showers.
Remember, a new Severe Thunderstorm Warning was issued for portions
of eastern Maryland as well as for central and southern Delaware.
LAT...LON 3904 7631 3898 7628 3900 7617 3913 7625
3934 7616 3938 7578 3929 7576 3929 7564
3936 7546 3887 7556 3873 7613 3871 7624
3876 7622 3873 7629 3885 7627 3879 7619
3893 7620 3897 7625 3892 7630 3897 7635
TIME...MOT...LOC 0455Z 284DEG 54KT 3934 7553 3909 7586 3887 7616
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 11:10 PM EST | Severe Thunderstorm Warning | PHI | Cecil | 50 min |
| Feb 12, 11:53 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 52 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2017Severe Thunderstorm Warnings in Delaware, 2017Every severe thunderstorm warning in 2017
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.