PNM 20250618
- Thomas Breckel
- 20 hours ago
- 7 min read
Updated: 1 minute ago
Update No. 2: 1:25 pm on Wednesday, 18 June 2025.
Changes from Update No. 1:
Clinton County has increased to an ENHANCED risk for severe weather (3 out of 5).
Confidence for Damaging Winds (Significant) is now assessed as HIGH.
Confidence for Large Hail (Elevated) and Tornadoes (Limited) remains at MEDIUM.
A few storms may produce hail large enough to cause minor damage to outdoor objects.
Isolated tornadoes possible with damage to structures, trees, and powerlines.
Supplemental Information:
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Update No. 1: 6:30 am on Wednesday, 18 June 2025
Updated Forecast: Severe Storms Remain Possible Wednesday – Heat Wave Potential to Follow
The National Weather Service (NWS) in Wilmington, Ohio, has updated its forecast regarding the potential for severe weather later today (Wednesday, June 18, 2025). Clinton County remains in the Slight Risk (Level 2 of 5) zone for severe storms, with some areas just northwest of us now included in the Enhanced Risk (Level 3 of 5).
What’s New?
Slight eastward expansion of the Enhanced Risk zone (now closer to Clinton County).
Earlier timing of storm development, with the primary severe threat now expected between 6:00 PM and 11:00 PM.
A new heat risk outlook has been added for this weekend into early next week.
What Could Happen?
The primary threats from tonight’s storm system continue to be:
Damaging Winds: Capable of downing trees and powerlines, and potentially causing structural damage.
Large Hail: Enough to damage vehicles and outdoor equipment.
Isolated Tornadoes: A limited threat, but possible with stronger storms.
Confidence remains medium regarding how far east the severe storms may travel and how long they will remain intense into the evening hours.
Updated Timing for Clinton County
Storms could begin impacting the area by early evening, with the most intense period between 6 PM and 11 PM.
Residents should monitor alerts throughout the afternoon and evening and be ready to act if warnings are issued.
Looking Ahead – Potential Heat Wave June 23–27
Beyond the storms, attention is shifting to the potential for a significant heat wave beginning Sunday and continuing through next week. The 6–10 Day Outlook from the NWS suggests high temperatures in the low to mid-90s, with heat index values potentially exceeding 100°F. This would mark the first major heat wave of the season for Clinton County and could pose a risk of heat-related illness—especially for outdoor workers, children, elderly residents, and anyone without adequate cooling.
Preparedness actions should begin now:
Ensure fans and air conditioning systems are working.
Check in on vulnerable neighbors.
Stay hydrated and plan outdoor activities during cooler hours of the day.
For updates throughout the day and safety tips during severe weather or excessive heat, follow Clinton County EMA and the National Weather Service Wilmington on social media or visit https://www.weather.gov/media/iln/ILNBriefing.pdf.
Preparedness Actions
Have multiple ways to receive warnings (e.g., NOAA Weather Radio, Clinton County Emergency Alerts, reliable weather apps).
Bring in or secure outdoor items such as furniture, flags, and trash bins.
Identify and prepare to move to your safest location in the event of a tornado warning—preferably a basement or small interior room with no windows.
Charge mobile devices and ensure you have flashlights or battery-operated lighting in case of power outages.
Finalize family communication plans in case household members are separated during the event.
Emergency responders and trained weather spotters should be prepared for rapid activation if needed.
Reference keywords SEVERE, POWER, and TORNADO at https://www.cc-ema.org/prepare.
Resources for More Information
Clinton County EMA provides several preparedness resources online to help residents prepare for severe weather. The following blog posts offer additional guidance:
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Posted: Tuesday, 17 June 2025
Forecasted Risk of Severe Weather – Clinton County, Ohio
Clinton County is under an SLIGHT Risk of severe weather for Wednesday, June 18, 2025, according to the Storm Prediction Center (SPC). This classification (Level 2 out of 5) signals a significant chance for short-lived and/or not widespread, isolated intense storms possible. The primary concerns are damaging straight-line winds, isolated hail, and a limited tornado threat.
This weather setup is driven by a mid-level weather disturbance known as a trough, along with a surface low-pressure system. These features will move through the Midwest, pulling a cold front across the region. When this front interacts with warm, humid air already in place over Ohio, it will likely trigger the development of thunderstorms.
Forecast models suggest that storms could initiate relatively early in the day and may persist through the evening.
The presence of moderate instability and wind shear in the atmosphere supports the potential for organized, long-lived storms. There is also concern for low-level wind rotation, which could produce isolated tornadoes, particularly if storms form into lines or clusters.
This event shares some similarities with the severe weather pattern that brought tornadoes and damage to Clinton County during the early hours of 3 April 2025. Residents should be prepared for rapidly changing weather conditions throughout the day.
Primary Severe Weather Threats for Clinton County
Damaging Winds: Strong, straight-line winds that can bring down trees and powerlines and cause structural damage. These are likely to be the most widespread hazard.
Isolated Hail: Some storms may produce hail large enough to damage vehicles, siding, and vegetation.
Tornadoes: The threat is limited but not zero. Rotating storms could produce brief tornadoes, especially if storm lines become organized.
Timing for Clinton County
Storm Development Window: Early evening (6 pm Wednesday to 2 am Thursday).
Severe Storm Risk Period: Most likely from 7:00 PM to 10:00 PM, with potential for lingering impacts into the evening.
Evening Outlook: Confidence decreases slightly after sunset, but storms may still pose a risk into the overnight hours depending on storm organization and forward motion.
Please note that the exact timing may shift slightly based on the evolution of the weather systems involved. Residents should monitor official updates throughout the day.
Preparedness Actions
Have multiple ways to receive warnings (e.g., NOAA Weather Radio, Clinton County Emergency Alerts, reliable weather apps).
Bring in or secure outdoor items such as furniture, flags, and trash bins.
Identify and prepare to move to your safest location in the event of a tornado warning—preferably a basement or small interior room with no windows.
Charge mobile devices and ensure you have flashlights or battery-operated lighting in case of power outages.
Finalize family communication plans in case household members are separated during the event.
Emergency responders and trained weather spotters should be prepared for rapid activation if needed.
Definitions of Key Weather Terms
Enhanced Risk: The third level in the SPC’s five-tier system for severe weather. Indicates a relatively high chance for multiple severe storms in the forecast area.
Surface Low: A low-pressure center at ground level, often associated with storm systems.
Mid-Level Trough: A dip in the jet stream or mid-atmosphere that encourages air to rise, helping to generate storms.
Cold Front: A boundary where a cooler air mass moves into a warmer one, often producing lift that triggers thunderstorms.
Instability: A condition where warm, moist air at the surface can rise rapidly into cooler air aloft—fuel for thunderstorms.
Wind Shear: Changes in wind speed or direction with height. It allows storms to rotate and persist longer.
QLCS (Quasi-Linear Convective System): A line of thunderstorms that can produce damaging winds and occasional tornadoes.
Low-Level Rotation (Streamwise Vorticity): Rotating air in the lower atmosphere that can contribute to tornado development.
NOAA Weather Radio: A specialized radio system that broadcasts real-time weather alerts and emergency messages from the National Weather Service.
With conditions favorable for severe weather, Clinton County residents are urged to stay informed, review emergency plans, and be ready to act. The combination of early-day storm potential and damaging wind threats means situational awareness will be critical. Follow Clinton County EMA and the National Weather Service for official updates, and take all warnings seriously. Timely action saves lives.
Reference keywords SEVERE, POWER, and TORNADO at https://www.cc-ema.org/prepare.
Resources for More Information
Clinton County EMA provides several preparedness resources online to help residents prepare for severe weather. The following blog posts offer additional guidance: