Shear related radar-based

severe storm climatology for

Austrian complex orography

strong deep-layer shear

weak deep-layer shear

change in diurnal cycle

Austrian new dual polarized C-band weather radar network

for aeronautical meteorology – recent projects Rudolf Kaltenboeck, Austrocontrol, Vienna, Austria, rudolf.kaltenboeck@austrocontrol.at

AAA4ATM Analysis of Available Airspace for Air Traffic Management

+ Joanneum Research, AIT; Meteoserve

Nowcasting of thunderstorm events has high impact on flight safety and efficiency for air traffic management. Future

strategic planning by air traffic control will result in circumnavigation of potential hazardous areas and the anticipation

of avoidance maneuvers. Weather radar data are used extensively to facilitate such forecasts. Within the project

AAA4ATM computer vision algorithms for detection of objects, feature extraction, 3D tracking and extrapolation as well

as down- and up-scaling strategies in meteorological image processing, blending to NWP model and forecaster

intervention are used for a time frame up to six hours.

Radar data visualization

in Visual Weather + M.Steinheimer, Austrocontrol; IBL Soft; EEC

CAPPI Austrian Composite

PPI multi map

Cross section

Combination

AUTOMETAR CB/TS

detection using

Bayesian network + H.Ganster, Joanneum Research; G.Croonen,

AIT

DUAL POL + G.Werner, M.Kraft, Austrocontrol; Ch.Tavolato,

Meteoserve; EEC

partly funded by

5 year frequency distribution of maximum projected radar reflectivity ZH ≥ 54 dBZ for low CAPE environment. Strong (upper

panel) vs. weak (lower panel) deep-layer vertical shear classification are shown.

Diurnal cycle of ZH contour exceeding 46 dBZ for the eastern part of Austria. See legend for different CAPE and deep-layer

shear classification. During strong shear conditions the maximums of detected cells are shifted to early evening hours. Thunderstorm outflow in the vicinity of Vienna. PPI 1° reflectivity and Doppler velocity data overlaid by surface observation

Hail storm in the vicinitiy of Vienna on 9th Aug. 2013.

Hail spike and polarimetric hail signature in the vicinity of Vienna on 9th Aug. 2013. (“ρhv hole” in PPI 4.5° at 6.5 km amsl).

Reported hail size is 4 cm.

Monitoring of vertical pointing calibration scan from WXR Feldkirchen.

EDGE hydrometeor classification shows hail bearing storm at PPI 4.5° in the vicinity of Vienna

on 9th Aug. 2013. Reported hail size is 4 cm.

.

WX:no, TS, VCTS

CLD:no,CB, TCU

lightning data

WXR data

SAT data

lightning TS

ightningVCTS

lightningCB

WXR2D maxproj.CB

WXR3D CAPPI lower level

CB/TCU

WXR2D maxproj.STRAT-CONV

WXR3D CAPPI upper level

CB/TCU

SAF CTcloud type

WXR2D maxproj.Extrapolation

CB

SAF CMcloud mask

SAF CTTcloud top temp.hidden nodes

yes/no