Welcome to hospice!
In addition to the resources recommended by NRSKarenRN, I recommend the AAHPM Palliative Primer; I use this resource daily!
HPNA Membership has also been invaluable. Depending where you live, there may be a local chapter as well.
As far as deaths during severe weather, your agency should have specific procedures. One thing to remember, a dead person isn't going to get any deader - there is no urgent patient symptom to address (I don't mean this disrespectfully, just to illustrate the importance of the hospice nurse driving safety to the destination). In my experience, family members get more frustrated when they are given inaccurate time estimates - if you are honest with them, typically they are reasonable. Customer service is so important immediately after a death. How a phone call is handled can make a huge difference. Some support can be done over the phone on the initial phone call. Under most circumstances (there are exceptions), taking a few minutes to allow them to process the death, reaffirm the quality of care the family provided, ask what the current concerns are, explain what the next steps are etc. I often inquire if they are waiting for other family members. If not, sometimes I confirm funeral home preference and ask family permission to give the funeral home a heads up or even arrange a tentative time. I've even had longer drives where I've pulled over to phone check the family (especially if a single family member is with the deceased) enroute or even contacted another hospice team member to provide some phone support while I'm enroute (if severe road conditions and I need to 100% focus on the roads). When I arrive, I always make sure I'm calm and collected. I don't mention if the drive was awful. This is about them and their needs.