In what way is that at odds? A search warrant just a affidavit of why you think (the visible signs of intoxication and/or field tests) you're going to find a pa

In what way is that at odds? A search warrant just a affidavit of why you think (the visible signs of intoxication and/or field tests) you're going to find a particular something (booze/drugs) in a particular place (your blood) that's signed off by a judge so they can take it by force (hold you down and draw your blood if they have to). There's really no hearing or particular extra procedure on top of that. If the warrant is invalid, you challenge it at your trial to get the evidence suppressed, but not when it is issued. Procedurally there's no difference presenting that document to sign in person or electronically. In the old days, you might have had to drive the judge's house in the middle of the to have them physically sign something urgent, but we have email now. As for judges being on-call, that's just how many courts choose to divide up the labor.