Yeah, but if you take off on 4, you can land in the Hudson if you lose them both.

If you takeoff on 13, your only option is JFK, and we all know how screwed up THAT place is. :-)

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But seriously, here what the METARs said this morning:

12n - KLGA 021551Z 03005KT 10SM FEW055 SCT250 28/13 A2986 RMK AO2 SLP112 T02830128
11am- KLGA 021451Z 05007KT 10SM FEW055 SCT250 27/13 A2987 RMK AO2 SLP114 T02670133 50002
10am- KLGA 021351Z 05006KT 10SM SCT250 26/14 A2987 RMK AO2 SLP116 T02560144
9am - KLGA 021251Z 09003KT 10SM BKN250 24/16 A2988 RMK AO2 SLP117 T02440156
8am - KLGA 021151Z VRB04KT 10SM SCT250 24/15 A2986 RMK AO2 SLP112 T02440150 10244 20211 53011

At Delta, the takeoff performance we get uses the latest *reported* weather, so while the tower might be reporting "winds variable at 3 kts" when people are taking the runway, the takeoff performance will use the reported wx from the last hour's report. Our performance will says, "RWY OVERWEIGHT FOR TAKEOFF" (or something similar) if you can't use it and not even give you any thrust setting/V speeds.

Believe me, the last thing everyone wants to do at LGA is gum up the works.