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 21.1°C · Dewpoint 19.2°C
Freezing level 11,687ft AGL · Wet bulb zero 11,590ft 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 4.54 miles SW before surface impact
Mid-level flow: 223°/54.0kt · Terminal velocity 7 m/s assumed
💨 Wind Shear & Storm Structure
0-6km bulk shear: 52kt · Tilt toward 222° SW
Low-level lapse rate: 6.1°C/km · Directional shear veering with height → warm air advection
🏜️ Dry Air & Moisture
Precipitable water: 41.19mm · CAPE: 805J/kg
Dry layer (T-Td>10°C) first found at: 33,152ft 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 |
1.340" |
11,687 |
11,590 |
41.19 |
4.54mi SW |
52 |
222° SW |
33,152 |
| CXYCapital City |
KLWX |
8,413 |
1.360" |
11,687 |
11,590 |
41.19 |
4.48mi SW |
52 |
222° SW |
33,152 |
| THVYork |
KLWX |
5,874 |
0.580" |
13,036 |
10,757 |
33.24 |
1.97mi SSW |
49 |
214° SW |
13,075 |
| SEGSelinsgrove |
KCCX |
6,608 |
0.610" |
10,924 |
10,140 |
35.5 |
4.03mi SW |
62 |
223° SW |
28,041 |
| LNSLancaster |
KDIX |
9,420 |
0.500" |
11,791 |
11,528 |
41.75 |
4.46mi SW |
45 |
220° SW |
45,014 |
| ZERSchuylkill Co. |
KCCX |
8,582 |
0.790" |
12,073 |
11,107 |
37.61 |
4.08mi SW |
48 |
224° SW |
45,036 |
| HZLHazleton |
KBGM |
7,429 |
0.780" |
10,491 |
10,007 |
32.08 |
4.89mi SW |
47 |
223° SW |
27,264 |
| RDGReading |
KDIX |
7,642 |
0.730" |
12,073 |
11,107 |
37.61 |
3.44mi SSW |
48 |
224° SW |
45,036 |
| MUIFt. Gap |
KCCX |
9,189 |
0.210" |
11,687 |
11,590 |
41.19 |
5.06mi SW |
52 |
222° SW |
33,152 |
| N79New Garden |
KDIX |
5,431 |
0.960" |
11,956 |
11,464 |
36.06 |
2.37mi SSW |
43 |
224° SW |
25,440 |