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IMPROVE: Improvement of Microphysical Parameterization through Observational Verification Experiment


The UW Department of Atmospheric Sciences in Seattle was the Forecasting and Operations Control Center (FOCC) for IMPROVE-1. Between IOPs, the S-Pol radar on the Washington Coast was used for surveillance of incoming storms, and this radar imagery was available to forecasters at the FOCC. When forecasts indicated that a frontal system was approaching within ~200 km of the Washington Coast, 3-hourly launches of rawinsondes were commenced at Quillayute, Westport, and Salem.

The Convair-580 departed from its home base at Paine Field, Washington, when the S-Pol radar showed precipitation features of interest within ~1 hour of being ~170 km from the coast. The Convair-580 was guided into precipitation features of interest off the Washington Coast by air-to-ground communications with a scientist at the FOCC who had real-time displays of the S-Pol radar images with the location of the Convair-580 overlaid. The basic flight pattern was a vertical profile from close to the ocean surface to the top of the cloud system or to the maximum altitude of the Convair-580 (~7.25 km), with the aircraft generally advecting with the precipitating feature of interest as it moved onto the coast through the region of dual-Doppler coverage.

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Datasets from this project

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Temporal coverage

Begin Date 2001-01-01 00:00:00
End Date 2001-02-14 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 49.00, Minimum (South) Latitude: 45.00
Minimum (West) Longitude: -126.00, Maximum (East) Longitude: -122.00