National Weather Service MPLS: 2026 Twin Cities Radar, Severe Weather Alerts, And Regional Climate Guide

The National Weather Service (NWS) coverage for the Minneapolis-St. Paul metropolitan area is officially operated by the NWS Weather Forecast Office (WFO) Twin Cities/Chanhassen. Located approximately 20 miles southwest of downtown Minneapolis, this forecast office provides continuous, 24/7 meteorological, hydrological, and severe weather warning coverage for 44 counties across central and southern Minnesota and west-central Wisconsin.

Understanding how to access, interpret, and utilize data from NWS MPLS is vital for emergency managers, local industries, aviation professionals, and residents. From tracking severe summer convection and tornadic activity across the Upper Midwest to forecasting complex winter winter storms and spring snowmelt flooding along the Mississippi and Minnesota Rivers, WFO Twin Cities delivers mission-critical environmental intelligence.

Operational Architecture of NWS Twin Cities (KMPX Chanhassen)

The operational footprint of the NWS Minneapolis forecast office spans across high-density urban corridors, expansive agricultural zones, and major river basins. To maintain actionable oversight across this geographic expanse, the office leverages an integrated network of remote sensing, surface observations, and advanced numerical weather prediction models.

The primary radar asset serving the Minneapolis area is KMPX, a dual-polarization WSR-88D (Weather Surveillance Radar, 1988, Doppler) facility situated in Chanhassen, Minnesota. The dual-polarization technology allows meteorologists to distinguish between liquid precipitation, hail, snow, sleet, and non-meteorological targets such as biological debris, smoke, or tornadic debris signatures (TDS).

Complementing the ground-based radar infrastructure is the direct ingest of GOES-East geostationary satellite imagery, high-resolution ASOS (Automated Surface Observing System) units stationed at Minneapolis-St. Paul International Airport (MSP), St. Paul Downtown Airport (STP), and Flying Cloud Airport (FCM), alongside atmospheric sounding balloons launched twice daily (00Z and 12Z).

Navigating Severe Weather Alerts in the Minneapolis Met Area

Weather patterns in eastern Minnesota undergo extreme seasonal transitions, ranging from sub-zero Arctic airmasses in winter to high-CAPEs (Convective Available Potential Energy) capable of producing destructive convective storms in late spring and summer. NWS MPLS categorizes severe weather events into a standardized threat matrix designed to trigger rapid public and municipal response.

Understanding Severe Thunderstorm and Tornado Threat Matrixes

During the convective season (typically April through September), WFO Twin Cities collaborates closely with the Storm Prediction Center (SPC) in Norman, Oklahoma, while maintaining direct control over local warning issuances.

1. Severe Thunderstorm Warnings: Issued when a storm produces winds of 58 mph (50 knots) or higher, and/or hail measuring 1 inch in diameter (quarter-sized) or larger. NWS MPLS incorporates damage threat tags into warning text, labeling storms as Considerable or Destructive when wind gusts exceed 70–80 mph or hail reaches golf-ball to baseball size.
2. Tornado Warnings: Triggered by radar-detected rotation (mesocyclone development or gate-to-gate velocity shear) or verified spotter reports of a funnel cloud or tornado on the ground. High-end events feature Tornado Emergency declarations specifically tailored for high-density populations within the Minneapolis-St. Paul urban envelope.
3. Flash Flood Warnings: Issued when intense rainfall rates exceed local hydrologic infiltration thresholds, leading to rapid inundation of urban streets, underpasses, and low-lying drainage basins. Urban Minneapolis features high impermeable surface coverage, making localized rapid-onset flash flooding a persistent hazard during slow-moving summer thunderstorms.

Operational Warning Note: NWS alerts utilize Hazard Simplification standards. Bulletins explicitly state what is happening, where the threat is located, the immediate impacts expected, and recommended protective actions. Severe weather warnings delivered via Wireless Emergency Alerts (WEA) automatically trigger alerts on cellular devices within polygon-defined risk zones.

How to Interpret Real-Time NWS MPLS Data Products

For advanced users, relying solely on basic app forecasts is insufficient. NWS Twin Cities provides several high-value, expert-level text and graphical products updated multiple times per day.

Area Forecast Discussion (AFD)

The Area Forecast Discussion is arguably the most valuable text product issued by NWS MPLS forecasters. Published at least four times daily (with extra updates during active weather), the AFD offers a candid, technical narrative explaining the reasoning behind the forecast.

The document details model synoptic setup (comparing GFS, ECMWF, HRRR, and NAM guidance), uncertainties in atmospheric soundings, timing of frontal passages, and confidence levels regarding snow accumulation or convective initiation.

Point Forecast Matrix (PFM) and Digital Forecast Database

While generalized metro forecasts provide a broad overview, the NWS digital forecast database splits the region into precise 2.5-kilometer grid cells. By accessing point-specific forecasts through the NWS Minneapolis portal, users obtain microclimate data customized for specific elevations, proximity to urban heat islands, and immediate river valley microclimates.

Reading Radar Velocity Scans from KMPX

When observing live KMPX radar data during severe weather events:

• Reflectivity (dBZ): Indicates precipitation intensity. Values above 50 dBZ indicate heavy rain and potential hail; values above 60–65 dBZ strongly indicate large hail.
• Storm Relative Velocity (SRV): Displays the motion of precipitation particles relative to the movement of the storm. Paired red (pixels moving away from radar) and green (pixels moving toward radar) areas adjacent to one another signal tight rotational couplers capable of tornado generation.
• Correlation Coefficient (CC): A dual-pol product that drops dramatically (below 0.90) inside severe rotational pockets, confirming that non-meteorological debris (trees, structures) has been lofted into the atmosphere, confirming a tornado touchdown regardless of visual confirmation.

Seasonal Climate Normals and Regional Hydrology

The Minneapolis weather regime is defined by its interior continental position, far removed from moderating oceanic thermal masses. This yields an extreme annual temperature envelope, where high temperatures can exceed 95°F in July while plunging below -20°F during winter Arctic outbreaks.

Winter Storm Metrics and Snowfall Records

Snowfall tracking for Minneapolis relies on observations collected at MSP Airport. NWS MPLS tracks seasonal snow accumulation from October 1 through April 30.

• Average Annual Snowfall: Approximately 51.2 inches across the 1991–2020 climate normal baseline.
• Dominant Winter Dynamics: Snowfall events in Minneapolis typically fall into three dynamic categories: Alberta Clippers (fast-moving, low-moisture, high-wind systems yielding dry powder), Colorado Lows (deep, moisture-laden systems delivering heavy, wet snow and severe travel disruptions), and Isentropic Lift events (broad, long-duration snow over cold surface air).
• Blizzard Standards: NWS Twin Cities issues Blizzard Warnings when sustained winds or frequent gusts reach 35 mph or greater, accompanied by falling or blowing snow that reduces visibility to less than 1/4 mile for three consecutive hours or longer.

Spring Hydrology: Minnesota and Mississippi River Basins

As winter transitions to spring, NWS MPLS operates a dedicated river forecasting protocol. The forecast office monitors the depth and liquid water content of the winter snowpack, the depth of frozen ground, surface soil saturation levels, and spring precipitation trends to publish long-range river flood outlooks.

Key hydrologic gauge sites monitored by NWS MPLS include:

• Mississippi River at St. Paul: Affects downtown riverfront infrastructure, Harriet Island, and industrial shipping terminals.
• Minnesota River at Jordan and Savage: Critical for assessing flood potential across agricultural lowlands and key transport arteries connecting Carver, Scott, and Hennepin counties.
• St. Croix River at Stillwater: Evaluates flood risks to historic downtown Stillwater and regional marine infrastructure.

Frequently Asked Questions About NWS MPLS

Where is the National Weather Service Minneapolis office physically located?

The NWS office serving the Minneapolis-St. Paul metro area is located in Chanhassen, Minnesota, at 1733 Lake Drive West. While often referred to as NWS Minneapolis or NWS MPLS, its official administrative name is NWS Weather Forecast Office Twin Cities/Chanhassen (Station ID: WFO MPX).

What is the difference between an NWS Watch and an NWS Warning?

A Watch means severe weather or a winter storm is possible in or near the designated area; it signals that conditions are favorable for hazardous weather and residents should prepare. A Warning means severe weather is imminent or occurring; immediate protective action must be taken to ensure life and property safety.

How often does NWS Twin Cities update the Area Forecast Discussion (AFD)?

The Area Forecast Discussion is routinely updated four times daily, typically around 3:00 AM, 10:00 AM, 3:00 PM, and 9:00 PM local time. However, during active severe weather, winter blizzards, or rapid environmental changes, forecasters publish intermediate updates as conditions warrant.

What radar station serves Minneapolis-St. Paul, and how do I look it up?

The primary Doppler radar serving the Minneapolis-St. Paul area is KMPX, located adjacent to the forecast office in Chanhassen, MN. It can be accessed on national radar viewers, third-party GIS apps, and the official NWS radar site using the call sign KMPX or selecting the Twin Cities radar site.

How does NWS MPLS track official temperature and snow records for Minneapolis?

Official climate observations for Minneapolis are recorded at Minneapolis-St. Paul International Airport (MSP). An Automated Surface Observing System (ASOS) collects hourly temperature, pressure, wind, and precipitation data, while certified observers manually measure snowfall depth and liquid equivalent multiple times per day during winter storms.

Utilizing Official NWS Resources for Safety and Planning

Maintaining continuous situational awareness during severe upper-Midwest weather events requires direct integration with verified NWS communication channels. Relying exclusively on automated third-party applications often strips out crucial context provided by meteorologists in the field.

To maximize personal and operational safety across Hennepin, Ramsey, and surrounding counties:

• Program NOAA Weather Radio receivers to monitor broadcast station KEC65 (162.550 MHz) for direct, unbuffered emergency alerts across the Minneapolis metro area.
• Check the NWS Twin Cities online portal daily to review the Hazardous Weather Outlook (HWO), which outlines weather threats for the next seven days.
• Monitor live KMPX radar data during active convective cells to assess hail risks, high winds, and local tornadic signatures.

By utilizing raw NWS MPLS data products, tracking the Area Forecast Discussion, and understanding regional atmospheric vulnerabilities, residents, business operators, and emergency responders can stay ahead of severe weather across the Minneapolis-St. Paul region.