Alert archive / Pennsylvania / Tornado Watches in 2006
Tornado Watch 756
The Storm Prediction Center issued this tornado watch at Aug 29, 2006, 1:52 PM EDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2006, 1:52 PM EDT (17:52 UTC)
- Expired
- Aug 29, 2006, 8:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 50 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, Harford County, MD, Howard County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Ocean County, NJ, Salem County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Centre County, PA, Chester County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Lycoming County, PA, Mifflin County, PA, Montgomery County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Philadelphia County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Union County, PA, York County, PA
The radar
The State College radar (KCCX), 150 km from the middle of the area, began a volume at 17:52 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 56 min |
| Aug 29, 2:14 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 61 min |
| Aug 29, 2:42 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 29, 2:53 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 52 min |
| Aug 29, 3:37 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 68 min |
| Aug 29, 3:39 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Aug 29, 3:42 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 33 min |
| Aug 29, 3:50 PM EDT | Flash Flood Warning | PHI | Montgomery | 3 hr |
| Aug 29, 4:02 PM EDT | Tornado Warning | PHI | New Castle | 28 min |
| Aug 29, 4:15 PM EDT | Flash Flood Warning | PHI | Philadelphia | 3 hr |
| Aug 29, 4:28 PM EDT | Tornado Warning | PHI | New Castle | 47 min |
| Aug 29, 4:45 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester | 60 min |
| Aug 29, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Talbot | 56 min |
| Aug 29, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland | 67 min |
| Aug 29, 5:41 PM EDT | Tornado Warning | PHI | Salem | 49 min |
| Aug 29, 5:43 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Aug 29, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May | 45 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.9 hours before the alert went out and 92 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
- 21 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 934 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 1:31 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 89 min |
| Aug 29, 6:25 PM EDT | Mesoscale Discussion | SPC | New Castle | 95 min |
| Aug 29, 3:26 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Prince George's, Saint Mary's, Somerset and 3 more | 94 min |
Nearby
Tornado Watches in Pennsylvania, 2006Tornado Watches in Maryland, 2006Tornado Watches in New Jersey, 2006Every tornado watch in 2006
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.