National Weather Service Weather Forecast Office

FROST/FREEZE INFORMATION FROM YOUR NATIONAL WEATHER SERVICE

OFFICE IN BISMARCK ND

THE NATIONAL WEATHER SERVICE OFFICE IN BISMARCK WILL STOP ISSUING

FROST ADVISORIES ON SEPTEMBER 24...BUT WILL CONTINUE PROVIDING

FREEZE WATCHES AND FREEZE WARNINGS FOR WESTERN AND CENTRAL NORTH

DAKOTA THROUGH OCTOBER 15...WHICH MARKS THE END OF THE LOCAL GROWING

SEASON...OR UNTIL A HARD FREEZE HAS BEEN OBSERVED ACROSS WESTERN

AND CENTRAL NORTH DAKOTA. WHICHEVER OCCURS FIRST. A HARD FREEZE IS

DEFINED AS TEMPERATURES AT OR BELOW 28 DEGREES FAHRENHEIT FOR A

PERIOD OF 3 OR MORE HOURS.

A FREEZE WATCH WILL BE CONSIDERED APPROPRIATE WHEN THERE IS THE

POTENTIAL FOR TEMPERATURES TO BE 32 DEGREES FAHRENHEIT OR BELOW FOR

GREATER THAN ONE HOUR OVER A GEOGRAPHICALLY SIGNIFICANT AREA DURING

THE NEXT 12 TO 48 HOURS.

A FREEZE WARNING WILL BE ISSUED WHEN THE TEMPERATURE IS EXPECTED TO

BE 32 DEGREES FAHRENHEIT OR BELOW FOR GREATER THAN ONE HOUR OVER A

GEOGRAPHICALLY SIGNIFICANT AREA DURING THE NEXT 24 HOURS.

SIGNIFICANT DAMAGE TO VEGETATION IS POSSIBLE AS A RESULT OF THESE

CONDITIONS.