Dangerous, Record-Breaking Heat to Continue in the Central and Eastern U.S.; Severe Thunderstorms in the Upper Midwest; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will continue across most of the central and eastern U.S this week. Heat indices will exceed 100 degrees. Severe storms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians Thursday, with the primary threat large to very large hail. Critical fire weather to continue in the Four Corners Region Read More >

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Damage survey results, Snowfall, and General Information:

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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)