Snow Day Chance

"; document.getElementById("snowDayProbability").value = ""; // Retrieve Input Values const state = document.getElementById("stateSelection").value; const predictedSnowInput = document.getElementById("predictedSnow").value.trim(); const predictedSnow = parseFloat(predictedSnowInput); // Validate Inputs if (!state || isNaN(predictedSnow)) { alert("Please select a state and enter a valid number for predicted inches of snow."); return; } if (predictedSnow < 0) { alert("Predicted inches of snow cannot be negative."); return; } // Base probability based on state let baseProbability = baseProbabilityMap[state] !== undefined ? baseProbabilityMap[state] : 0.2; // Default to 20% if state not found // Get snow factor per inch based on state preparedness let snowFactorPerInch = getSnowFactor(state); // Adjust probability based on predicted snow let snowFactor = predictedSnow * snowFactorPerInch; let totalProbability = baseProbability + snowFactor; // Ensure the probability does not exceed 0.95 (95%) if (totalProbability > 0.95) { totalProbability = 0.95; } // Ensure minimum probability of baseProbability even if snowFactor is 0 if (predictedSnow === 0) { totalProbability = baseProbability; } // Convert to percentage let probabilityPercentage = Math.round(totalProbability * 100); // Display the result document.getElementById("snowDayProbability").value = `${probabilityPercentage}%`; // Build Calculation Steps stepsSnowDay += "Snow Day Probability Calculation:

"; // Step 1: Input Values stepsSnowDay += "Step 1: Input Values
"; stepsSnowDay += `- State: ${getStateLabel(state)}
`; stepsSnowDay += `- Predicted Inches of Snow: ${predictedSnow} inch(es)

`; // Step 2: Base Probability from State stepsSnowDay += "Step 2: Determine Base Probability from State
"; stepsSnowDay += `- Base Probability for ${getStateLabel(state)}: ${Math.round(baseProbability * 100)}%

`; // Step 3: Adjust Snow Factor Based on State Preparedness stepsSnowDay += "Step 3: Adjust for State Preparedness
"; if (southernStates.includes(state)) { stepsSnowDay += `- ${getStateLabel(state)} is a Southern state. Snow factor per inch remains at ${snowFactorPerInch * 100}%.

`; } else if (northernStates.includes(state)) { stepsSnowDay += `- ${getStateLabel(state)} is a Northern state. Snow factor per inch reduced by 50%.
`; stepsSnowDay += `- Adjusted Snow Factor per Inch: ${snowFactorPerInch * 100}% × 50% = ${Math.round((snowFactorPerInch * 0.5) * 100)}%

`; } else { stepsSnowDay += `- ${getStateLabel(state)} has moderate preparedness. Snow factor per inch remains at ${snowFactorPerInch * 100}%.

`; } // Step 4: Adjust Probability Based on Predicted Snow stepsSnowDay += "Step 4: Adjust for Predicted Inches of Snow
"; stepsSnowDay += `- Each inch of snow adds ${snowFactorPerInch * 100}% probability.
`; stepsSnowDay += `- Predicted Inches: ${predictedSnow} × ${snowFactorPerInch * 100}% = ${Math.round(snowFactor * 100)}%
`; stepsSnowDay += `- Total Probability before capping: ${Math.round(baseProbability * 100)}% + ${Math.round(snowFactor * 100)}% = ${probabilityPercentage}%
`; if (totalProbability >= 0.95) { stepsSnowDay += `- Capped at 95% since probability cannot exceed 95%.
`; } stepsSnowDay += `
`; // Step 5: Final Result stepsSnowDay += `Result: There is a ${probabilityPercentage}% chance of having a snow day in ${getStateLabel(state)} based on the predicted ${predictedSnow} inch(es) of snow.
`; // Update calculation steps in the UI if the steps section is visible if (document.getElementById("calculationStepsSnowDay").style.display === "block") { document.getElementById("calculationStepsSnowDay").innerHTML = stepsSnowDay; } } function resetFieldsSnowDay() { // Clear all input fields document.getElementById("stateSelection").value = ''; document.getElementById("predictedSnow").value = ''; // Clear result field document.getElementById("snowDayProbability").value = ''; // Clear calculation steps stepsSnowDay = ""; document.getElementById("calculationStepsSnowDay").innerHTML = "

No calculations performed yet.

"; } function toggleStepsSnowDay() { const stepsDiv = document.getElementById("calculationStepsSnowDay"); const arrow = document.getElementById("toggleArrowSnowDay"); if (stepsDiv.style.display === "none" || stepsDiv.style.display === "") { stepsDiv.style.display = "block"; arrow.style.transform = "rotate(180deg)"; // Populate steps if available if (stepsSnowDay !== "") { stepsDiv.innerHTML = stepsSnowDay; } else { stepsDiv.innerHTML = "

No calculations performed yet.

"; } } else { stepsDiv.style.display = "none"; arrow.style.transform = "rotate(0deg)"; } } // Helper Functions function getStateLabel(stateCode) { const states = { "AL": "Alabama", "AK": "Alaska", "AZ": "Arizona", "AR": "Arkansas", "CA": "California", "CO": "Colorado", "CT": "Connecticut", "DE": "Delaware", "FL": "Florida", "GA": "Georgia", "HI": "Hawaii", "ID": "Idaho", "IL": "Illinois", "IN": "Indiana", "IA": "Iowa", "KS": "Kansas", "KY": "Kentucky", "LA": "Louisiana", "ME": "Maine", "MD": "Maryland", "MA": "Massachusetts", "MI": "Michigan", "MN": "Minnesota", "MS": "Mississippi", "MO": "Missouri", "MT": "Montana", "NE": "Nebraska", "NV": "Nevada", "NH": "New Hampshire", "NJ": "New Jersey", "NM": "New Mexico", "NY": "New York", "NC": "North Carolina", "ND": "North Dakota", "OH": "Ohio", "OK": "Oklahoma", "OR": "Oregon", "PA": "Pennsylvania", "RI": "Rhode Island", "SC": "South Carolina", "SD": "South Dakota", "TN": "Tennessee", "TX": "Texas", "UT": "Utah", "VT": "Vermont", "VA": "Virginia", "WA": "Washington", "WV": "West Virginia", "WI": "Wisconsin", "WY": "Wyoming" }; return states[stateCode] || "Unknown State"; }