National Weather Service United States Department of Commerce

Strong Winds Expected Today Into Tonight

Strong winds will develop across eastern Kentucky today with wind gusts exceeding 40 mph. Widespread showers and a few thunderstorms will track across the area this evening and will bring the potential for a few damaging wind gusts. Read More >

Criteria may be adjusted in certain circumstances to take into account the expected impact of an event.  For example, a Winter Weather Advisory may be issued for less than an inch of snow if will occur at a peak travel time, such as around the normal morning commute time, and thus potentially have a significant impact.

Severe Weather Events...

Severe Thunderstorm Warning

  • Thunderstorm wind gusts of 58 mph or greater,
  • AND/OR hail measuring 1" in diameter or larger.

Tornado Warning

  • Tornado observed or indicated on radar.

Special Weather Statement

  • Thunderstorm wind gusts of 40 to 57 mph,
  • AND/OR hail less than 1" in diameter,
  • AND/OR frequent to continuous lightning,
  • AND/OR funnel clouds not expected to become a tornado threat.

See NWSI 10-511 WFO Severe Weather Products Specification for additional information.

 

Flood Events...

Flash Flood Warning

  • Life or property-threatening, short-term flooding is imminent or occurring.  This can include flooding due to heavy rainfall or due to a dam or levee break.

Flood Warning

  • Flooding due to potentially damaging river level rises,
  • OR overland flooding that is expected to persist for many hours.

Flood Advisory

  • Nuissance flooding including river/stream flooding and/or ponding of water in a geographic area that warrants notification of the public but less urgent than a warning.

Special Weather Statement

  • Heavy rainfall that is not expected to cause hazardous travel conditions but is not expected to cause flooding.

See NWSI 10-922 WFO Hydrologic Products Specification for additional information.

 

Winter Weather Events...

Blizzard Warning

  • Sustained wind or frequent gusts of 35 mph or higher,
  • AND visibility less than 1/4 mile in snow and/or blowing snow for 3 hours or longer.

Ice Storm Warning

  • Damaging ice accumulations of 1/4" or more.

Winter Storm Warning

  • Snowfall of 4" or more in 12 hours or 6" or more in 24 hours,
  • OR sleet accumulation of 1/2" or more in 24 hours.

Winter Weather Advisory

  • Snowfall of at least 1" but less than 4" in a 12 hour period,
  • AND/OR visibility reduced to 1/4 mile or less in blowing snow,
  • AND/OR sleet accumulation of less than 1/2".

Freezing Rain Advisory

  • Ice accumulations of less than 1/4".

Wind Chill Warning

  • Wind chills of 25 below or colder are expected. In most cases a minimum wind speed of 10 mph should be occurring or forecast before a warning is issued.

Wind Chill Advisory

  • Wind chills of 10 below to 24 below are expected. In most cases a minimum wind speed of 10 mph or more should be occurring or forecast before an advisory is issued.

Special Weather Statement

  • Black ice,
  • OR short-duration heavy snow bands.

See NWSI 10-513 WFO Winter Weather Products Specifications for additional information.

 

Non-Precipitation Events...

High Wind Warning

  • Sustained non-thunderstorm wind speeds of at least 40 mph for an hour or more,
  • OR non-thunderstorm wind gusts of at least 58 mph regardless of duration.

Wind Advisory

  • Sustained non-thunderstorm wind speeds between 30 and 39 mph for at least one hour,
  • OR non-thunderstorm wind gusts of 40 to 57 mph for any duration.

Lake Wind Advisory

  • Issued when sustained non-thunderstorm wind speeds reach 20 to 29 mph for at least one hour,
  • OR non-thunderstorm wind gusts reach between 35 to 39 mph.

Freeze Warning

  • Widespread temperatures are forecast to be 30ºF or below for 2 hours or more during the growing season.  The beginning of the spring frost/freeze season and ending of the fall frost/freeze season is determined in conjunction with the University of Kentucky Agricultural Weather Center.

Frost Advisory

  • Widespread frost during the growing season.  The beginning of the spring frost/freeze season and ending of the fall frost/freeze season is determined in conjunction with the University of Kentucky Agricultural Weather Center.

Excessive Heat Warning

  • Issued when the heat index is expected to reach around 110ºF or higher,
  • AND the minimum heat index will remain around 75ºF or higher during a 48 hour period.
  • A warning would also be appropriate if heat advisory criteria are expected to be reached for 4 consecutive days.

Heat Advisory

  • Issued for heat index of around 105ºF

Dense Fog Advisory

  • Widespread visibility 1/4 mile or less due to dense fog.

Dense Smoke Advisory

  • Widespread visibility 1/4 mile or less due to dense smoke.

Dust Storm Warning

  • Widespread visibility 1/4 mile or less due to blowing dust.

Blowing Dust Advisory

  • Widespread visibility of between 1/4 mile and 1 mile.

Special Weather Statement

  • Heat indices or wind chill values near "advisory" level for an hour or two,
  • OR local areas of dense fog, dense smoke or other hazards that are below advisory criteria.

See NWSI 10-515 WFO Non-Precipitation Weather Products Specification for additional information.

 

Fire Weather Events...

Red Flag Warning

  • Sustained 20-foot wind speeds of 15 mph or greater,
  • AND minimum relative humidity of 25% or less,
  • AND 10-hour fuel moisture values of 8% or less.

See NWSI 10-401 Fire Weather Services Product Specification for additional information.