Gap-Filling Mobile Radar Observations of a Snow Squall in the San Luis Valley

Rosenow, Andrew A.; Howard, Kenneth; Meitín, José

doi:10.1175/MWR-D-17-0323.1

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Gap-Filling Mobile Radar Observations of a Snow Squall in the San Luis Valley

2018
By Rosenow, Andrew A. ; Howard, Kenneth ; Meitín, José
Source: Mon. Wea. Rev. (2018) 146 (8): 2469–2481.

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Details:

Journal Title:

Monthly Weather Review
Personal Author:

Rosenow, Andrew A. ; Howard, Kenneth ; Meitín, José

Rosenow, Andrew A. ; Howard, Kenneth ; Meitín, José Less -
NOAA Program & Office:

CIMMS (Cooperative Institute for Mesoscale Meteorological Studies) ; OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory)

CIMMS (Cooperative Institute for Mesoscale Meteorological Studies) ; OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) Less -
Description:

On 24 January 2017, a convective snow squall developed in the San Luis Valley of Colorado. This squall produced rapidly varying winds at San Luis Valley airport in Alamosa, Colorado, with gusts up to 12 m s−1, and an associated visibility drop to 1.4 km from unlimited in less than 10 min. This snow squall was largely undetected by the operational WSR-88D network because of the Sangre de Cristo Range of the Rocky Mountains lying between the valley and the nearest WSR-88D in Pueblo, Colorado. This study presents observations of the snow squall from the X-band NOAA X-Pol radar, which was deployed in the San Luis Valley during the event. These observations document the squall developing from individual convective cells and growing upscale into a linear squall, with peak radial velocities of 15 m s−1. The environment conducive to the development of this snow squall is examined using data from the High-Resolution Rapid Refresh model, which shows an environment unstable to ascending surface-based parcels, with surface-based convective available potential energy (SBCAPE) values up to 600 J kg−1 in the San Luis Valley. The mobile radar data are integrated into the Multi-Radar Multi-Sensor (MRMS) mosaic to illustrate both the large improvement in detectability of this event gained from a gap-filling radar as well as the capability of MRMS to incorporate data from new radars designed to fill gaps in the current radar network.
Keywords:

[+]

Radar Snow
Source:

Mon. Wea. Rev. (2018) 146 (8): 2469–2481.
DOI:

https://doi.org/10.1175/MWR-D-17-0323.1
Document Type:

Journal Article
Funding:

Grant no. NA11OAR4320072
Place as Subject:

San Luis Valley (Colo. and N.M.)
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:6d1b17df0ce15f007333cfa906db2dfe3b82841f46a2b6e53e1ed4bb1aa60b0d
Download URL:

https://repository.library.noaa.gov/view/noaa/25690/noaa_25690_DS1.pdf
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Gap-Filling Mobile Radar Observations of a Snow Squall in the San Luis Valley

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