Narrative:

WX was deteriorating rapidly with high winds and a snow squall moving onto the field from the north. I accepted a handoff on a B737 approximately 9 mi southeast on final for runway 33L. Runway 33L was the active runway, wind 300 degrees 15 gusting to 30. I informed the approach controller of the special WX observation, and suggested that the B737 may need the ILS runway 24 approach. I also advised him of the current wind and offered runway 24 for the B737 if desired. Approach acknowledged and told me he would advise. The B737 checked on frequency approximately 6 mi from the field. He was advised of departing traffic, wind, and PIREPS of turbulence and windshear. He was cleared to land at this time as well. I cleared the departing aircraft for takeoff, and at this time noticed that the B737 was at 500 ft and descending. I issued a low altitude alert, advising the B737 that he was at 300 ft, 4 mi from the field. He responded that he was going around, and I assigned 2000 ft. His lowest observed altitude was 200 ft MSL.

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Original NASA ASRS Text

Title: A B737 INBOUND TO ISP DURING MARGINAL WX DSNDED TOO LOW AND THE TWR CTLR ISSUED A LOW ALT ALERT. THE B737 MADE AN IMMEDIATE PULL UP AND THE TWR ASSIGNED HIM 2000 FT FOR HIS GAR.

Narrative: WX WAS DETERIORATING RAPIDLY WITH HIGH WINDS AND A SNOW SQUALL MOVING ONTO THE FIELD FROM THE N. I ACCEPTED A HDOF ON A B737 APPROX 9 MI SE ON FINAL FOR RWY 33L. RWY 33L WAS THE ACTIVE RWY, WIND 300 DEGS 15 GUSTING TO 30. I INFORMED THE APCH CTLR OF THE SPECIAL WX OBSERVATION, AND SUGGESTED THAT THE B737 MAY NEED THE ILS RWY 24 APCH. I ALSO ADVISED HIM OF THE CURRENT WIND AND OFFERED RWY 24 FOR THE B737 IF DESIRED. APCH ACKNOWLEDGED AND TOLD ME HE WOULD ADVISE. THE B737 CHKED ON FREQ APPROX 6 MI FROM THE FIELD. HE WAS ADVISED OF DEPARTING TFC, WIND, AND PIREPS OF TURB AND WINDSHEAR. HE WAS CLRED TO LAND AT THIS TIME AS WELL. I CLRED THE DEPARTING ACFT FOR TKOF, AND AT THIS TIME NOTICED THAT THE B737 WAS AT 500 FT AND DSNDING. I ISSUED A LOW ALT ALERT, ADVISING THE B737 THAT HE WAS AT 300 FT, 4 MI FROM THE FIELD. HE RESPONDED THAT HE WAS GOING AROUND, AND I ASSIGNED 2000 FT. HIS LOWEST OBSERVED ALT WAS 200 FT MSL.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.