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 · Sfc temp -10.7°C · Dewpoint -12.4°C
Freezing level —ft AGL · Wet bulb zero —ft AGL
📡 Radar Beam Position (MDT · KLWX · 8,493ft AGL)
Beam is below the freezing level — sampling liquid water. Best-case radar QPE scenario.
💧 Raindrop Trajectory (MDT)
Drop sampled at 8,493ft AGL drifts 3.55 miles SSE before surface impact
Mid-level flow: 201°/82.4kt · Terminal velocity 7 m/s assumed
💨 Wind Shear & Storm Structure
0-6km bulk shear: 94kt · Tilt toward 189° S
Low-level lapse rate: -2.9°C/km · Directional shear veering with height → warm air advection
🏜️ Dry Air & Moisture
Precipitable water: 17.37mm · CAPE: 0J/kg
Dry layer (T-Td>10°C) first found at: 39,322ft 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 |
1.490" |
— |
— |
17.37 |
3.55mi SSE |
94 |
189° S |
39,322 |
| CXYCapital City |
KLWX |
8,413 |
0.970" |
— |
— |
17.37 |
3.49mi SSE |
94 |
189° S |
39,322 |
| THVYork |
KLWX |
5,874 |
1.000" |
10,848 |
10,799 |
38.43 |
3.01mi SSW |
72 |
213° SSW |
38,540 |
| SEGSelinsgrove |
KCCX |
6,608 |
1.000" |
— |
— |
14.05 |
2.32mi SSE |
95 |
196° SSW |
38,688 |
| LNSLancaster |
KDIX |
9,420 |
0.830" |
— |
— |
17.72 |
4.19mi SSE |
96 |
187° S |
39,342 |
| ZERSchuylkill Co. |
KCCX |
8,582 |
0.220" |
— |
— |
17.3 |
3.17mi SSE |
89 |
189° S |
39,340 |
| HZLHazleton |
KBGM |
7,429 |
0.750" |
— |
— |
13.41 |
2.9mi S |
98 |
204° SSW |
39,274 |
| RDGReading |
KDIX |
7,642 |
0.000" |
— |
— |
17.3 |
2.57mi SE |
89 |
189° S |
39,340 |
| MUIFt. Gap |
KCCX |
9,189 |
0.520" |
— |
— |
17.37 |
4.13mi SSE |
94 |
189° S |
39,322 |
| N79New Garden |
KDIX |
5,431 |
0.010" |
— |
— |
17.71 |
1.82mi ENE |
92 |
187° S |
39,672 |