Mouse over on the product on the left side
to see the criteria for issuance
Tornado Warning
Criteria:
Tornado Warning:
Tornadoes sighted or indicated on radar
Tornado Emergency:
In exceedingly rare situations, when a severe threat to human life and catastrophic damage from a tornado is imminent or ongoing.
Severe Thunderstorm Warning
Criteria:
Wind gusts of 58 MPH or greater
...or...
Hail of 1.00" in diameter or greater
Special Weather Statement
Criteria:
Wind gusts of 40 MPH to 57 MPH
...or...
Hail of 0.50" to 0.99" in diameter
The Special Weather Statement (SPS) is also used
for other types of significant weather, usually
when falling below warning or advisory criteria.
Flash Flood Warning
Criteria:
Flash Flood Warning:
Flooding observed or indicated by radar...
...in rapidly changing, short-term situations
Flash Flood Emergency:
In exceedingly rare situations, when a severe threat to human life and catastrophic damage from a flash flood is imminent or ongoing.
Flood Warning (Areal)
Criteria:
Flooding observed or indicated by radar...
...in long-term situations
Minor flooding observed or indicated by radar...
...such as a few inches of water over roads...
...or small creeks out of their banks, but not affecting structures
Flash Flood Watch
Criteria:
Elevated potential for flooding...
...in rapidly changing, short-term situations
Flood Watch
Criteria:
Elevated potential for flooding...
...in long-term situations
Excessive Heat Watch/Warning
Criteria:
Heat Index of 105ºF or greater
Heat Index of 105ºF or greater
...or...
Heat Index of 100ºF to 104ºF for two consecutive days
Heat Advisory
Criteria:
Heat Index of 100ºF to 104ºF
High Wind Watch/Warning
Criteria:
Wind gusts of 58 MPH or greater
...or...
Sustained winds of 40 MPH or greater for one hour
Issued during non-convective weather
Wind Advisory
Criteria:
Wind gusts of 46 MPH to 57 MPH
...or...
Sustained winds of 31 MPH to 39 MPH for one hour
Issued during non-convective weather
Dense Fog Advisory
Criteria:
Visibility reduced to 1/4 mile or less
Freezing Fog Advisory
Criteria:
Light ice accumulation from freezing fog
Freeze Watch/Warning
Criteria:
Minimum temperature of 32ºF or less...
...during frost/freeze season
Frost Advisory
Criteria:
Minimum temperature of 33ºF to 36ºF...
...during frost/freeze season
Red Flag Warning / Fire Weather Watch
Criteria:
10-hour fuel moisture of 8% or less
...and...
Relative humidity of 25% or less
...and...
Wind Speed of 15 MPH or greater
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