Alert archive / Maryland / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 202, NWS Philadelphia/Mount Holly

August 26, 2012Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 26, 2012, 2:22 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 53 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: Aug 26, 2012, 2:22 PM EDT (18:22 UTC)
Expired: Aug 26, 2012, 3:15 PM EDT
In force: 53 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), 61 km from the middle of the area, began a volume at 18:25 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.4 hours before the alert went out and 110 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 926 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 504 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

171 
WUUS51 KPHI 261822
SVRPHI
MDC011-035-041-261915-
/O.NEW.KPHI.SV.W.0202.120826T1822Z-120826T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
222 PM EDT SUN AUG 26 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND...
  NORTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...
  CENTRAL QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...

* UNTIL 315 PM EDT

* AT 221 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
  MATTHEWS...AND MOVING NORTH AT 15   MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CORDOVA AROUND 235 PM EDT...
  QUEEN ANNE AND SKIPTON AROUND 245 PM EDT...
  WYE MILLS AND JUMPTOWN AROUND 300 PM EDT...
  STARR AROUND 305 PM EDT...
  CARVILLE...CENTREVILLE AND HOPE AROUND 315 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3872 7616 3899 7624 3898 7620 3900 7618
      3904 7620 3906 7619 3911 7593 3881 7590
TIME...MOT...LOC 1822Z 171DEG 11KT 3884 7599

$$

IOVINO

1 follow-up statement

739 
WWUS51 KPHI 261851
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
251 PM EDT SUN AUG 26 2012

MDC011-261901-
/O.CAN.KPHI.SV.W.0202.000000T0000Z-120826T1915Z/
CAROLINE MD-
251 PM EDT SUN AUG 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CAROLINE COUNTY
IS CANCELLED...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3899 7624 3898 7620 3900 7618 3904 7620
      3906 7619 3911 7593 3899 7592 3894 7595
      3888 7595 3886 7592 3884 7592 3874 7617
TIME...MOT...LOC 1851Z 171DEG 11KT 3893 7601

$$

MDC035-041-261915-
/O.CON.KPHI.SV.W.0202.000000T0000Z-120826T1915Z/
TALBOT MD-QUEEN ANNE'S MD-
251 PM EDT SUN AUG 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR CENTRAL QUEEN ANNE'S AND NORTHEASTERN TALBOT COUNTIES...

AT 250 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 QUEEN ANNE...MOVING NORTH AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WYE MILLS BY 300 PM EDT...
  STARR BY 305 PM EDT...
  CARVILLE...CENTREVILLE...HOPE AND 7 MILES EAST OF QUEENSTOWN BY 315
  PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3899 7624 3898 7620 3900 7618 3904 7620
      3906 7619 3911 7593 3899 7592 3894 7595
      3888 7595 3886 7592 3884 7592 3874 7617
TIME...MOT...LOC 1851Z 171DEG 11KT 3893 7601

$$

IOVINO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 7:43 AM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's	2 hr
Aug 26, 11:48 AM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's, Talbot	117 min
Aug 26, 12:17 PM EDT	Areal Flood Advisory	PHI	Caroline, Talbot	118 min
Aug 26, 12:49 PM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's	91 min
Aug 26, 1:29 PM EDT	Flash Flood Warning	PHI	Caroline, Queen Anne's, Talbot	7 hr
Aug 26, 2:58 PM EDT	Flash Flood Warning	PHI	Kent, Queen Anne's	4 hr
Aug 26, 3:15 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	25 min
Aug 26, 5:36 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	39 min
Aug 26, 5:42 PM EDT	Tornado Warning	PHI	Caroline	19 min
Aug 26, 6:15 PM EDT	Flash Flood Warning	PHI	Caroline, Queen Anne's	4 hr
Aug 26, 7:39 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	66 min
Aug 26, 7:59 PM EDT	Areal Flood Warning	PHI	Queen Anne's, Talbot	15 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2012 Every severe thunderstorm warning in 2012

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.