Alert archive / Maryland / Mesoscale Discussions in 2012
Mesoscale Discussion 1505
The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2012, 6:53 PM EDT for 5 states. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2012, 6:53 PM EDT (22:53 UTC)
- Expired
- Jul 19, 2012, 8:30 PM EDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 39 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Baltimore County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, City of Baltimore, MD, Dorchester County, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Talbot County, MD, Washington County, MD, Wicomico County, MD, Worcester County, MD, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Adams County, PA, Chester County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, York County, PA, Berkeley County, WV, Jefferson County, WV, Morgan County, WV
The radar
The Dover AFB radar (KDOX), 103 km from the middle of the area, began a volume at 22:53 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.9 hours before the alert went out and 20 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
- 137 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1167 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 2:20 PM EDT | Mesoscale Discussion | SPC | Logan, McDowell, Mingo | 85 min |
| Jul 19, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | Logan, McDowell, Mercer, Mingo, Monroe, Raleigh and 2 more | 7 hr |
| Jul 19, 7:17 PM EDT | Mesoscale Discussion | SPC | Logan, McDowell, Mercer, Mingo, Raleigh, Summers and 1 more | 88 min |
Nearby
Mesoscale Discussions in Maryland, 2012Mesoscale Discussions in Pennsylvania, 2012Mesoscale Discussions in New Jersey, 2012Every mesoscale discussion 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.