Delta B738 at Madison on Dec 16t h2013, runway excursion after landing

A Delta Airlines Boeing 737-800, registration N372DA performing flight DL-385 from Minneapolis,MN to Madison,WI (USA) with 60 passengers and 6 crew, landed on Madison's runway 18 at 15:58L (21:58Z). During roll out the crew reported braking action good and was instructed to vacate the runway via taxiway A6 to A and to report when clear of the runway. The crew subsequently radioed "I think you need to send the trucks out" and required assistance stating "we could not stop at the end of the runway by A6 and we exited the prepared surface just at the end of the runway to the right towards A6" and "it appears we are all the way off the runway into the snow covered Pampa". The next arrival on short final, about 2nm from touch down, was instructed to go around, the runway and airport was closed while emergency services responded.

The passengers disembarked via mobile stairs and were bussed to the terminal.

The airport was closed for about 90 minutes.

Metars:

KMSN 162353Z 19004KT 9SM -SN BKN035 OVC045 M11/M13 A3000 RMK AO2 SLP180 4/004 P0001 60021 T11061133 11106 21122 50002

KMSN 162312Z 00000KT 4SM -SN BR SCT012 OVC065 M11/M13 A3002 RMK AO2 P0001 T11111133

KMSN 162253Z 19003KT 1SM R36/5000VP6000FT -SN BR VV012 M11/M13 A3002 RMK AO2 SLP186 SNINCR 1/4 P0008 T11111133

KMSN 162246Z 00000KT 3/4SM R36/5500VP6000FT -SN BR VV011 M11/M13 A3002 RMK AO2 SFC VIS 1 P0007 T11111133

KMSN 162233Z 00000KT 3/4SM R36/3500V4500FT -SN BR VV008 M11/M13 A3003 RMK AO2 P0006 T11111133

KMSN 162215Z 00000KT 1/4SM R36/2400V3000FT +SN FZFG VV006 M11/M13 A3001 RMK AO2TWR VIS 1/2 P0003 T11111133

KMSN 162157Z 00000KT 1/4SM R36/2400VP6000FT SN FZFG VV014 M12/M13 A3002 RMK AO2TWR VIS 1/2 P0000 T11171133

KMSN 162153Z 00000KT 1/2SM R36/2600VP6000FT SN FZFG VV016 M12/M13 A3002 RMK AO2 SLP186 SNINCR 1/3 P0007 T11171133

KMSN 162143Z 17003KT 1/2SM R36/5000VP6000FT -SN BR OVC021 M12/M14 A3001 RMK AO2SFC VIS 3/4 P0006 T11171139

KMSN 162133Z 00000KT 1/4SM R36/4000V6000FT SN FZFG VV011 M12/M13 A3001 RMK AO2 SFC VIS 1/2 P0006 T11171133

KMSN 162053Z 20004KT 1/4SM R36/2000V4500FT SN FZFG VV009 M12/M14 A3000 RMK AO2 TWR VIS 3/4 SLP178 P0005 60005 T11171139 56010

KMSN 162042Z 20004KT 1/4SM R36/3000V4500FT SN FZFG VV010 M12/M14 A3000 RMK AO2 TWR VIS 3/4 P0004 T11171139

KMSN 162022Z 21003KT 1/2SM R36/2800V3500FT SN FZFG VV013 M12/M14 A3000 RMK AO2 TWR VIS 3/4 P0002 T11171139

KMSN 162008Z 20004KT 1/2SM R36/3500V4500FT SN BKN019 OVC030 M12/M15 A3000 RMK AO2 TWR VIS 3/4 P0001 T11171150

KMSN 161956Z 20007KT 1 1/2SM R36/5500VP6000FT -SN BKN023 BKN032 OVC039 M11/M17 A3000 RMK AO2 P0000 T11111167

KMSN 161953Z 20006KT 2SM -SN SCT025 BKN032 OVC039 M11/M17 A3000 RMK AO2 TWR VIS 2 1/2 SNB36 SLP179 P0000 T11061172

KMSN 161853Z 19007KT 10SM OVC040 M12/M18 A3001 RMK AO2 SLP181 T11171178