National Weather Service United States Department of Commerce

Severe Thunderstorms, Heavy Rainfall, And Flooding Possible Over The Plains; Typhoon Bualoi Approaches The CNMI

A storm system will bring the potential for severe thunderstorms capable of damaging winds, large hail, and isolated tornadoes over the south central U.S. into Monday. Heavy rainfall may also lead to flash flooding. The system will shift toward the eastern U.S. on Tuesday. Over the western Pacific, Typhoon Bualoi will intensify and impact the northern Marianna Islands over the next couple of days. Read More >

 

 

 

Larimer County Weather Decision Support

 

Click on any area for more detailed information on each Warning, Watch or Advisory.  
(Current Fires depicted by a green triangle)

 

 

Severe Weather/Flash Flooding Decision Support

 

Today's Severe Weather Outlook

 

 

 

 

Tornado Risk Legend         Tornado Safety Tips
 Risk Level
Definition
None
No tornado risk.
Limited
Probability of a tornado within 25 miles of a point:
less than 10 percent.
Elevated
Probability of a tornado within 25 miles of a point:
Equal to or greater than 10 percent.
Significant
Probability of a tornado within 25 miles of a point:
Equal to or greater than 30 percent.
Extreme
Probability of a  tornado within 25 miles of a point:
Equal to or greater than 45 percent.

 

 

 

Hail Risk Legend         Severe Thunderstorm Safety Tips

 
Risk Level
Definition
None
No risk of hail.
Limited
Risk of sub-severe hail (less than 1")
or
Probability of severe hail (1" or greater) within 25 miles of a point:
less than 15%
Elevated
Probability of severe hail (1" or greater) within 25 miles of a point:
Equal to or greater than 15%
Significant
Probability of severe hail (1" or greater) within 25 miles of a point:
Equal to or greater than 45%
Extreme
Probability of severe hail (1" or greater) within 25 miles of a point:
Equal to or greater than 60%

 


 

 

Thunderstorm Wind Gust Risk Legend         Severe Thunderstorm Safety Tips
 
Risk Level
Definition
None
No thunderstorm wind risk.
Limited
Risk for sub-severe wind gusts (less than 58 mph)
or
Probability of severe wind gusts (58 mph or greater) within 25 miles of a point:
Less than 15%
Elevated
Probability of severe wind gusts (58 mph or greater) within 25 miles of a point:
Equal to or greater than 15%
Significant
Probability of severe wind gusts (58 mph or greater) within 25 miles of a point:
Equal to or greater than 45%
Extreme
Probability of severe wind gusts (58 mph or greater) within 25 miles of a point:
Equal to or greater than 60%

 

 

 

Flooding Legend         Flooding Safety Tips
 
Risk Level
Definition
None
No Flooding risk.
Limited
Risk of localized flash flooding of small streams and low water crossings, and minor flooding of poor drainage or urban areas.
Elevated

Risk of flash flooding of several low water crossings, roads, and small streams,
or
Minor River Flooding.

Significant

Risk of flash flooding of numerous roads, low water crossings, and small streams,
or
Moderate river flooding.

Extreme
Risk of widespread flash flooding of low water crossings, roads, and small streams.
or
Major river flooding.

 

Winter Weather Decision Support
 

 

Snowfall Totals by Location
Experimental -
 
What's this?

Snowfall Totals by Location

 

These tables show the snowfall forecast for individual locations. The tables provide the same information as the maps on this web page, just shown in a different way. The "Exceedance" option shows the chance that snow will exceed a certain threshold. The "Range" option shows the likelihood of snowfall being within a certain range. All of these values are valid for the same time period as depicted on the graphics.

County:
 
Switch to: Range Exceedance

 

High Wind Decision Support

 

 

 

 

                                  Non Thunderstorm Wind Legend         Wind Safety Tips     Boating Safety Tips

Risk Level
Definition
None

Sustained winds < 20 mph
and
Wind gusts < 30 mph.

Limited
Sustained winds 20-29 mph
or
Wind gusts 30-44 mph.
Elevated
Sustained winds 30-39 mph
or
Wind gusts 45-57 mph.
Significant
Sustained winds 40-49 mph
or
Wind gusts 58-64 mph.
Extreme
Sustained winds > 50 mph
or
Wind gusts > 65 mph.

 

 

 

 

Fire Weather Decision Support


Today's Fire Potential

 

Fire Weather Legend Wildfire weather Safety Tips
Risk Level


Definition

Low Open burning is usually safe with proper containers and precautions under low fire danger conditions.  
Residents should always check on local ordinances that prohibit open burning under any conditions.
Moderate

Open burning is usually safe with the proper precautions. 
Burning should be done in the early morning and late evening
to avoid windier and drier conditions from midday through mid-afternoon.

Residents should always check on local ordinances that prohibit open burning under any conditions.

High Approaching Red Flag conditions.
All open burning is discouraged due to increased wind and lower humidity except by experienced fire personnel. Increasing winds and lower humidity contribute to drying fuels.
Fires escape control more easily and containment is difficult for inexperienced fire personnel.
Very High Open burning should not be attempted.
Open fires can quickly escape and are very difficult to control, even for experienced fire fighters.
Conditions exceed minimum criteria for a Red Flag Warning in most cases.
Severe Very strong winds, well in excess of Red Flag Criteria combined with moderate to low humidity.
Fires will spread very quickly with spot fires common. 
Fire control is extremely difficult due to very strong winds.
***These definitions are geared towards the general public and general emergency management and should not be confused with the standard National Fire Danger Rating System (NFDRS) adjectives used by wildland fire personnel

 

 

 

 

 

 

Current Radar and Warnings

 

 

Real Time Lightning Data 

Number of Lightning Strikes/Flashes over a 2 Minute Period provided by COLMA (updated every 60 seconds)

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