Alerts for Strong Thunderstorms

The NWS in Lincoln, as well as other NWS offices in the Central Region of the United States, will be issuing a new alert for strong thunderstorms this year. A SIGNIFICANT WEATHER ALERT will be issued for thunderstorms that are expected to produce:

  • Wind gusts around 50 mph             and/or
  • Hail from 3/4 inch to less than one inch in diameter

This new product is intended to alert the public that strong thunderstorms are anticipated, but they are not expected to produce severe wind, widespread damage or large hail. The Significant Weather Alert will be disseminated using the NWS product header - Special Weather Statement (SPSILX).

If you are in an area impacted by a Significant Weather Alert, you can expect gusty wind around 50 mph, small hail, heavy rain and lightning. Keep in mind that a wind around 50 mph can cause small tree limbs to break or light objects, like patio furniture or trampolines to be blown around. Monitor the weather situation in case the storms intensify, and your location is upgraded to a Severe Thunderstorm or Tornado Warning.

A Severe Thunderstorm Warning will be issued for thunderstorms expected to produce wind gusts of 58 mph (50 knots) or greater, wind damage, and/or hail one inch in diameter (the size of quarter) or larger.

Below is an example of a Significant Weather Alert:

   WWUS83 KILX 240144
   SPSILX

   SPECIAL WEATHER STATEMENT
   NATIONAL WEATHER SERVICE LINCOLN IL
   844 PM CDT THU APR 23 2009 

ILZ029>031-037-240215-
MARSHALL-PEORIA-TAZEWELL-WOODFORD-
844 PM CDT THU APR 23 2009
 
...SIGNIFICANT WEATHER ALERT FOR EASTERN PEORIA...NORTHERN
TAZEWELL...SOUTHERN MARSHALL AND WESTERN WOODFORD COUNTIES UNTIL 915 PM CDT...
 
AT 842 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING 
FROM DUNLAP TO PEORIA
TO MARQUETTE HEIGHTS...MOVING EAST 
AT 45 MPH.
 
HAIL UP TO PENNY SIZE...AND WINDS AROUND 50 MPH...ARE EXPECTED 
WITH
THESE STORMS.
 
LOCATIONS IMPACTED INCLUDE...
 SPRING BAY...
 ROME...
 EAST PEORIA...
 MORTON...
 GERMANTOWN HILLS...
 CHILLICOTHE...
 WASHINGTON...
 
OTHER LOCATIONS AFFECTED INCLUDE...ALTA...NORTH PEKIN...
PEORIA AIRPORT...NORWOOD...PEORIA HEIGHTS AND GROVELAND.
 
PEOPLE NEAR THESE LOCATIONS SHOULD MONITOR THE WEATHER 
SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS...AND BE 
PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE 
WEATHER THREATEN.
 
LAT...LON 4099 8933 4061 8932 4058 8970 4095 8974
TIME...MOT...LOC 0143Z 262DEG 40KT 4089 8964 4063 8958
 
$$
 
 
  
 
 
 
 


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