Storm cells developing over southeastern North Dakota and west central Minnesota could “pulse up” and produce hazardous weather, according to the National Weather Service (NWS) Grand Forks. The weather service issued this alert via social media to warn residents in the affected regions of potential rapid intensification of these atmospheric cells.
The development of these cells represents a localized weather threat where specific areas of the atmosphere experience sudden increases in strength. According to the NWS Grand Forks, the current atmospheric conditions in southeastern North Dakota and west central Minnesota are conducive to this “pulsing” effect, which can lead to sudden shifts in precipitation intensity and wind speeds.
Meteorologists monitor these specific patterns to determine if cells will remain isolated or organize into more significant storm systems. The primary concern with “pulsing” cells is the lack of predictability regarding which specific townships or counties will experience the peak intensity of the storm.
What does it mean for storm cells to “pulse up”?
When the National Weather Service describes cells that “pulse up,” they are referring to a process where a convective cell rapidly intensifies. This typically occurs when a pocket of unstable air is lifted quickly, leading to a surge in updrafts. According to NOAA, this process can result in a sudden increase in rainfall rates and the potential for lightning or gusty winds within a very small geographic area.
Unlike a linear storm front that moves across a state in a predictable line, pulsing cells act more like individual bubbles of energy. One area may experience a heavy downpour and wind gusts, while a location only a few miles away remains dry. This volatility makes real-time monitoring essential for public safety in the Red River Valley and surrounding prairie regions.
Which areas are currently at risk?
The alert specifically targets two primary geographic zones: southeastern North Dakota and west central Minnesota. These areas are often subject to complex interactions between moisture moving up from the Gulf of Mexico and cooler air masses descending from Canada. The intersection of these air masses creates the instability necessary for cells to develop and pulse.
Residents in these regions are encouraged to monitor local radar and official alerts from the NWS Grand Forks office. Because these cells can intensify quickly, the window between the initial development and the onset of hazardous weather can be brief.
How should residents respond to these alerts?
While a general alert about “pulsing cells” is not the same as a formal severe thunderstorm warning, it serves as a critical heads-up for those in the path of the development. The NWS suggests that individuals in southeastern North Dakota and west central Minnesota keep a way to receive emergency alerts, such as a NOAA Weather Radio or a smartphone app with push notifications enabled.
If a cell pulses up directly over a populated area, the immediate risks include:
- Rapidly decreasing visibility due to heavy rain.
- Sudden wind gusts that can impact high-profile vehicles.
- Localized flooding in areas with poor drainage.
- Lightning strikes associated with the convective surge.
The National Weather Service emphasizes that weather in the Northern Plains can change rapidly. A cell that appears insignificant on radar can “pulse” into a more dangerous entity within minutes if the atmospheric fuel—specifically moisture and instability—is sufficient.
Comparing pulsing cells to organized storm systems
There is a distinct difference between the pulsing cells currently being monitored and organized systems like supercells or squall lines. Organized systems typically have a more defined structure and a more predictable path of travel. Pulsing cells, by contrast, are more sporadic. They are characterized by a cycle of growth and decay; as the cell “pulses” up, it reaches a peak intensity before the rain-cooled air eventually collapses the updraft, causing the cell to dissipate or weaken.
This cycle means that while the overall threat may be lower than a massive storm complex, the localized impact can be surprisingly intense. For a farmer in west central Minnesota or a commuter in southeastern North Dakota, a pulsing cell can create a sudden, high-impact event without the long-lead warning typical of larger systems.
The next confirmed checkpoint for this weather event will be the issuance of specific county-level warnings or the dissipation of the cells as they move east. Residents should continue to check the latest radar imagery to see if these cells are organizing or losing strength.
Do you have photos or videos of the weather in your area? Share them with us in the comments below.
