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elcome to the Meteorological Development Laboratory (MDL)! MDL conducts applied research and development for the improvement of diagnostic and prognostic weather information; data depiction and utilization; warning and forecast product preparation and dissemination; forecast evaluation; and impact-based decision support services. Projects involve physical, dynamical, and statistical applications and tools implemented on NWS operational systems. Emphasis is placed on integrated suites of guidance and products for Weather Forecast Offices, River Forecast Centers, and National Centers, and NWS Core Partners.
Latest News
Probabilistic Extra-Tropical Storm Surge Model Upgraded to Version 1.4
Jan 30, 2026
In September 2025, the National Oceanic and Atmospheric Administration's National Weather Service (NOAA NWS) Meteorological Development Laboratory (MDL) upgraded its operational Probabilistic Extra-Tropical Storm Surge (P-ETSS) model to version 1.4.
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Meteorological Development Laboratory’s Localized Aviation MOS Program and Gridded LAMP upgraded to Version 2.7
Oct 09, 2025
An important upgrade to the Localized Aviation Model Output Statistics (MOS) Program (LAMP) and Gridded LAMP (GLMP) systems was implemented into NWS operations on Tuesday, September 16, 2025.
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National Blend of Models (NBM) Upgraded to Version 4.3
May 27, 2025
On May 27, 2025, NOAA’s National Weather Service (NWS) upgraded its operational product, the National Blend of Models (NBM) — a nationally-consistent and calibrated suite of forecast products generated by combining numerical weather prediction and post-processed data. This upgrade (version 4.3) primarily focused on improvements to the NBM Tropical Cyclone Feature-Matched wind speed product and incorporated updates provided by the Storm Prediction Center (SPC) to the probabilistic severe weather products.
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Probabilistic Storm Surge (P-Surge) Upgraded to Version 3.1
May 20, 2025
On May 20, 2025, NOAA NWS upgraded its operational Probabilistic storm Surge (P-Surge) model to version 3.1. P-Surge brings a probabilistic approach to the modeling of storm surge, and is run on a case-by-case basis in advance of hurricanes and tropical storms that may impact the Atlantic and Gulf coastlines of the contiguous U.S., Puerto Rico, the U.S. Virgin Islands, and now, with the most recent upgrade, the coastlines of Hawaii.
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About MDL
Organization
History
News and Announcements
Projects
Model Output Statistics
National Digital Forecast Database
National Blend of Models
Localized Aviation MOS Program
Storm Surge
Forecast Verification
Decision Support Tools
Probabilistic Forecast Visualization
Rip Current Observation and Prediction
DeGRIB
Data Management
NWS Connect
NWSChat 2.0
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