Atmospheric Cross-Section — West to East · MDT Peak Hour Sounding
Wind Hodograph — 0 to 6km AGL
Key Findings — Peak Hour Analysis
☁️ Precipitation Type
Surface: 🌧 Rain (marginal freezing) · Sfc temp 2.1°C · Dewpoint 1.8°C
Freezing level 8,209ft AGL · Wet bulb zero 8,185ft AGL
📡 Radar Beam Position (MDT · KLWX · 8,493ft AGL)
Beam is above the freezing level — sampling ice/snow crystals. Z-R relationship wrong for liquid QPE.
💧 Raindrop Trajectory (MDT)
Drop sampled at 8,493ft AGL drifts 2.63 miles SSE before surface impact
Mid-level flow: 222°/32.2kt · Terminal velocity 7 m/s assumed
💨 Wind Shear & Storm Structure
0-6km bulk shear: 91kt · Tilt toward 198° SSW
Low-level lapse rate: 1.5°C/km · Directional shear veering with height → warm air advection
🏜️ Dry Air & Moisture
Precipitable water: 23.42mm · CAPE: 0J/kg
Dry layer (T-Td>10°C) first found at: 30,878ft AGL
Deep moist column — precipitation efficiency high
Hourly Precipitation Timeline — All Stations (corrected hourly totals)
10-Station Ensemble — Peak Hour RAP Thermodynamics
| Station | Radar | Beam AGL | Event Total |
Freeze ft | WBZ ft | PW mm |
Drop Drift | Shear kt |
Storm Tilt | Dry Layer ft |
| MDTHarrisburg Intl |
KLWX |
8,493 |
0.800" |
8,209 |
8,185 |
23.42 |
2.63mi SSE |
91 |
198° SSW |
30,878 |
| CXYCapital City |
KLWX |
8,413 |
0.680" |
8,209 |
8,185 |
23.42 |
2.61mi SSE |
91 |
198° SSW |
30,878 |
| THVYork |
KLWX |
5,874 |
0.800" |
12,344 |
9,902 |
31.29 |
2.51mi WSW |
65 |
240° WSW |
11,085 |
| SEGSelinsgrove |
KCCX |
6,608 |
0.380" |
731 |
692 |
19.99 |
2.56mi SE |
64 |
189° S |
33,046 |
| LNSLancaster |
KDIX |
9,420 |
0.570" |
8,339 |
8,133 |
22.4 |
2.44mi SSE |
96 |
210° SSW |
30,889 |
| ZERSchuylkill Co. |
KCCX |
8,582 |
0.230" |
8,203 |
7,416 |
22.24 |
2.15mi SE |
89 |
204° SSW |
40,621 |
| HZLHazleton |
KBGM |
7,429 |
0.100" |
1,383 |
1,431 |
14.92 |
1.61mi SE |
72 |
211° SSW |
8,728 |
| RDGReading |
KDIX |
7,642 |
0.600" |
8,203 |
7,416 |
22.24 |
2.06mi SE |
89 |
204° SSW |
40,621 |
| MUIFt. Gap |
KCCX |
9,189 |
0.340" |
8,209 |
8,185 |
23.42 |
2.75mi SSE |
91 |
198° SSW |
30,878 |
| N79New Garden |
KDIX |
5,431 |
0.220" |
7,326 |
7,300 |
21.41 |
1.62mi ESE |
69 |
207° SSW |
40,947 |