National Weather Service United States Department of Commerce

Severe Weather and Flash Flooding Threat in the Central U.S. This Weekend

Heavy rain and severe weather is forecast across the central and southern Plains this weekend. Large hail and strong winds will be the primary threats. A Slight Risk (level 2 of 5) for severe thunderstorms has been issued. Consecutive days of heavy rainfall may lead to flash flooding across Missouri and Oklahoma on Sunday. A Moderate Risk (Level 3 of 4) for excessive rainfall has been issued. Read More >

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Please Report:

We ask our SkyWarn™ Spotters to contact our office when they experience any of the events listed below.

Cold-Season (Winter) criteria:

  • Snowfall
    • When (new) snow accumulation reaches 3 inches
    • When (new) snow accumulation reaches 6 inches
    • Give a final report/total at the end of the storm (water equivalent if possible)
    • 1 inch per hour or greater accumulation rates
  • Ice
    • Any occurrance, or accumulation, of freezing rain
    • Accumulation of 1/4" or more of ice on trees/wires
  • General Winter Reports
    • When forecast winter precipitation differs significantly from observed (i.e. snowing with no snow in forecast, sleet...when only snow is forecast...)
    • Any other significant weather occurrence/oddity (i.e. flooding due to snow melt/ice jam, damage from strong winds not associated with a thunderstorm)

Warm-season (Thunderstorms) criteria:

  • Tornadoes or funnel clouds (be very wary of look-alikes; watch for rotation)
  • Wall clouds, especially if they are rotating
  • Hail (Please be specific with regard to size)
    Other sizes/descriptions to use for hail:
    
    * Pea 0.25 inch
    
    * Penny 0.75 inch
    
    * Nickel 0.88 inch
    
    * Quarter 1.00 inch (15/16")
    
    * Half dollar 1.25 inch
    
    * Walnut/Ping Pong 1.50 inch
    
    * Golf ball 1.75 inch
    
    * Lime 2.00 inches
    
    * Tennis Ball 2.50 inches
    
    * Baseball 2.75 inches
    
    * Large Apple 3.00 inches
    
    * Softball 4.00 inches
    
    * Grapefruit 4.50 inches
    
    • Quarter-Size (1") and larger is severe!
  • Wind Gusts (40 mph or greater; specify whether estimated or recorded)
    • large branches downed (specify diameter of branch)
    • Trees/power lines downed
    • Structural damage to buildings (roof, windows, etc.)
  • Rainfall
    • 1 inch or greater in an hour (NOT a 1"/hr. rate for 10 minutes)
    • 2 inches or greater storm total
  • Flooding
    • Streams/Rivers -- also, when nearing bankfull
    • Street (when more than the usual poor drainage puddles)

 

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