High Heat and Humidity through Mid Week - Heat Advisory & Excessive Heat Warning

Oct 12, 2026

High Heat and Humidity through Mid Week forecasts peak heat index conditions across Monday to Wednesday, with many areas in the mid 90s to around 100°F and occasional readings near 105°F in parts of NE NJ and near NE NJ. Heat advisories are expected for much of Monday and Tuesday, potentially extending into Wednesday depending on forecast timing. Peak conditions occur between noon and 6 PM daily, with an increased risk of heat-related illness for vulnerable populations. An isolated severe thunderstorm is possible late afternoon and evening Monday, mainly north and west of NYC, with damaging wind gusts.

LanguageEnglish

CategoryGeneral

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Key Messages

HAZARDS & IMPACTS

Excessive Heat Warning

Alerts

Heat Advisory

Excessive Heat Watch

Maximum Heat Index Forecast

Maximum Heat Index - Monday

Maximum Heat Index - Tuesday

Maximum Heat Index - Wednesday

NWS Heat Index and Effects

Heat Safety Guidance

Practice Heat Safety

Wherever You Are

# High Heat and Humidity through Mid Week Max Heat Indices: ## Key Messages ·Monday and Tuesday:Mid 90s to around 100 in advisory area.Isolated heatindices near 105 for NE NJ. ·High heat and humidity with heat indices approaching or exceeding 100°Fat times Monday,Tuesday and Wednesday. HAZARDS& IMPACTS · Wednesday:Upper 90s to around 100 for much of the region.Again isolated heatindices near 105 possible within and near NE NJ. ·Heat Advisories include much of the region for Monday and Tuesday.Heat headlines will likely need to be extended into Wednesday. ·Timing:Max heat indices between noon and 6 PM each day. ·Impacts:There is an increased risk of heat-relatedillness for vulnerablepopulations with this event.Thunderstorm Potential: ## Excessive Heat ·An isolated severe thunderstorm is possible during the late afternoon and eveninghours Monday,mainly north and west of NYC.The primary threat is damagingwind gusts.Heat Advisory: ### ■Excessive Heat Warning ALERTS ■Heat Advisory NWS ■Excessive Heat Watch · All locations except the south fork of Long Island and coastal New London countyin CT through 10 PM Tuesday. Additional · There is uncertainty with the timing of showers and thunderstorms as well as theamount of cloud cover ahead of an approaching cold front on Wednesday.Thiscould impact the amount of heating.Thus,the Heat Advisory has not beenextended into Wednesday.By 6 PM Monday,or sooner if significant changes occur with the forecast. Details Graphic Created BRIEF NEXT July 14th,2024 5:16 PM EDT ## Maximum Heat Index-Monday ## Maximum Heat Index-Tuesday ## Maximum Heat Index -Wednesday ## NWS Heat Index and Effects The heat index is a measure ofhow hot it really feels when relative humidity is factored in withair temperature.You can use thischart to find the heat index yourself.For more information onHeat Safety,please go to: https://www.weather.gov/safety/heat NWS Heat IndexTemperature(°F)808284868890929496984080818385889194971011051091141191241301364580828487899396100104109114119124130137508183858891959910310811311812413113755818486899397101106112117124130137608284889195100105110116123129658285899398103108114121128136708386909510010511211912613475848892971031091161241328084899410010611312112985859096102110117126135908691981051131221319586931001081171271008795103112121132 Relative Humidity(%) Likelihood of Heat Disorders with Prolonged Exposure or Strenuous Activity □CautionExtreme CautionDanger■Extreme Danger | Effect on the body
Classification Heat Index | | --- | | Caution
80°F-90°F Fatigue possible with prolonged exposure and/or physical activity | | Extreme
90F- Heat stroke,heat cramps,or heat exhaustion possible with prolonged
103°F
Caution
exposure and/or physical activity | | 103F- Heat cramps or heat exhaustion likely,and heat stroke possible with
Danger
124°F
prolonged exposure and/or physical activity | | Heat stroke highly likely
125°F or
Extreme
Danger
higher | Practice HEAT SAFETYWherever You AreHeat related deaths are preventable.Protect yourself and others from theimpacts of heat waves.weather.gov/heat下https://www.weather.gov/wrn/heat infographics

FAQs

When are the maximum heat index conditions expected each day?

Maximum heat index values are expected between noon and 6 PM each day.

Which areas may see heat index values near 105°F?

Isolated heat index values near 105°F are possible in and near NE NJ, and an isolated severe thunderstorm risk is noted mainly north and west of NYC.

What health risk is emphasized for vulnerable populations during this event?

There is an increased risk of heat-related illness for vulnerable populations, especially during prolonged exposure or strenuous activity.

Oct 12, 2026

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