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Probabilistic Weather Prediction with an Analog Ensemble

Open access
Delle Monache, Luca, Eckel, F. Anthony, Rife, Daran L., Nagarajan, Badrinath, Searight, Keith·2013·Monthly Weather Review

Abstract

This study explores an analog-based method to generate an ensemble [analog ensemble (AnEn)] in which the probability distribution of the future state of the atmosphere is estimated with a set of past observations that correspond to the best analogs of a deterministic numerical weather prediction (NWP). An analog for a given location and forecast lead time is defined as a past prediction, from the same model, that has similar values for selected features of the current model forecast. The AnEn is evaluated for 0–48-h probabilistic predictions of 10-m wind speed and 2-m temperature over the contiguous United States and against observations provided by 550 surface stations, over the 23 April–31 July 2011 period. The AnEn is generated from the Environment Canada (EC) deterministic Global Environmental Multiscale (GEM) model and a 12–15-month-long training period of forecasts and observations. The skill and value of AnEn predictions are compared with forecasts from a state-of-the-science NWP ensemble system, the 21-member Regional Ensemble Prediction System (REPS). The AnEn exhibits high statistical consistency and reliability and the ability to capture the flow-dependent behavior of errors, and it has equal or superior skill and value compared to forecasts generated via logistic regression (LR) applied to both the deterministic GEM (as in AnEn) and REPS [ensemble model output statistics (EMOS)]. The real-time computational cost of AnEn and LR is lower than EMOS.

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Crossref · 10.1175/mwr-d-12-00281.1

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Metadata

Authors
Delle Monache, L., Eckel, F. A., Rife, D. L., Nagarajan, B., & Searight, K.
Venue
Monthly Weather Review
Published
2013-09-25
Volume
141
Issue
10
Pages
3498-3516
ISSN
  • 0027-0644 (ISSN-L)
  • 1520-0493
OpenAlex
W2170860720
Cited by
339
References
47
FWCI
11.47
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Probabilistic Weather Prediction with an Analog Ensemble. https://app.cochat.ai/papers/10.1175/mwr-d-12-00281.1
The paper
Delle Monache, L., Eckel, F. A., Rife, D. L., Nagarajan, B., & Searight, K. (2013). Probabilistic Weather Prediction with an Analog Ensemble. Monthly Weather Review. https://doi.org/10.1175/mwr-d-12-00281.1

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