Heat Advisory HEAT ADVISORY - Collin County
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METRIC | IMPERIAL
Updated: 01-Aug-2021 @ 9:55am  
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 4.4°F than last hour.

89.1°F

Heat Index:  100.2°F
Warm
High Today
89.1°F
9:53 AM
Low Today
79.6°F
7:00 AM
Yest High
99.4°F
2:46 PM
Yest Low
79.8°F
6:07 AM
Sta* High
107.2°F
2011
Sta* Low
67.6°F
2014
Avg* High
97.1°F
for Today
Avg* Low
76.2°F
for Today
* Based on this station's measurements taken since 10/2009
Sunny, Dry Sunny, Dry
Wind from W Wind:  W
3.7

Gusting to:
9.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
8.0 of 100
Today

Today: Showers and thunderstorms likely, mainly after 5pm.  Partly sunny, with a high near 96. Heat index values as high as 106. Southwest wind 5 to 10 mph becoming east northeast in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely
Tonight

Tonight: Showers and thunderstorms likely, mainly after 3am.  Mostly cloudy, with a low around 74. North northwest wind 10 to 15 mph becoming northeast in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
T-storms
Likely
Monday

Monday: Showers and thunderstorms likely, mainly before 1pm.  Partly sunny, with a high near 89. North northeast wind 10 to 15 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely
Hi 96 °F Lo 74 °F Hi 89 °F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.3°F since last hour. 75.8°F
Last Hour: Increased 0.3°F since last hour. 0.3°F
High 9:48 AM: 76.5°F
Low 5:12 AM: 73.7°F
Record High: 81.5°F on
Aug-17-2017
Record Low: -6.5°F on
Feb-16-2021
Wetbulb: 79.7°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Aug Rain: 0.00 in
Aug to Date
  Avg:10
0.00 in
Aug to Date
  Diff from Avg:10
No Change 0.00 in
Aug Avg: 2.86 in
Diff from Avg: Under 2.86 in for the month 2.86 in
Season:1 35.82 in
YTD
  Avg:11
27.25 in
YTD
  Diff from Avg:11
Over 8.57 in for the year 8.57 in
Last Rain
Time/Date:
Jul-20-2021
at 1:26 AM
67 rain days in 2021
0 days in August
12 days since last rain
Current: W  3.7 mph
1Hr Average: 4.7 mph
Wind Run: 37.38 miles
Wind Gust
Current: 9.0 mph mph
Today: 12.0 mph 1:12 AM
Month: 12.0 mph Aug-1
Year: 48.0 mph Mar-17
Record Gust: 63.3 mph
Mar-29-2017
Sunlight:
13 hrs 45 min 26 sec
of Sunlight Today

Which is
1 min 30 sec shorter
than yesterday

(Noon) pie chart (Midnight)

Legend
Waning Crescent
Waning Crescent, 22 days, 13 hours, 41 minutes in cycle
40% Illuminated
Humidity Barometer
Current: Decreased 9% since last hour. 65%
Last Hour: Decreased 9% since last hour. 9%
High 6:35 AM: 83%
Low 9:52 AM: 65%
Record High: 100%
Oct-6-2009
Record Low: 11%
Jan-30-2021
Current: Rising 0.022  inHg/hr 29.946 inHg
Last Hour: Rising slowly
High 9:52 AM: 29.948 in.
Low 3:27 AM: 29.879 in.
Record High: 30.844 inHg
Jan-1-2018
Record Low: 29.323 inHg
Jan-21-2017
Cooling Degree Days Snow3 Heat Index Air
Today: 7.4
Aug: 7.4
2021 to Date: 1362.4
Heating Degree Days
2021 to Date: 1543.6
Today: 0.00 in
Yesterday: 0.00 in
Aug Snow: No Change 0.00 in
Aug Avg: 0.00 in
Diff from Avg: 0.00 in
Season Total:2 0.00 in
Snow Depth: 0.00 in
0 snow days in August
0 snow days this season.2
First Snow of Season:
Jan-10-2021
Average 1st Snow:
21 of Dec
Current: 100.2°F
High 9:52am: 100.6°F
Yesterday: 112.1°F
Record: 121.5°F
Aug-12-2016
Quality
Index6:

50


Good

Density:
1.15 kg/m3

aqi
aqi
Current UV Index Current Solar Energy9
1.2
Sunburn in
93 Minutes
Highest:
9:54 AM
1.2
485 W/m2
81%
W/m2 SI
High Today:
9:54 AM
485  W/m2
Record:
1480 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 64.1°F
Sunrise: 6:40 am
Sunset: 8:26 pm
Moonrise: 1:07 am
Moonset: 2:52 pm
Full Moon: Jul-24-2021
New Moon: 13:51 UTC
Aug-8-2021
Updated at Midnight
Current ET: 0.09 in
7-Days Rain: 0.00 in
7-Days ET: 1.80 in
7-Day:  1.803 in water in deficit of what evaporated in last 7 days. 1.803 in
August: No Change 0 in
HIGHS: LOWS:
109.4°F
Aug-3-2011
-2.6°F
Feb-16-2021
Daytime Records
  108.3°F
Aug-10-2015
  9.3°F
Feb-15-2021
Nitetime Records
  96.8°F
Aug-04-2011
  2.8°F
Feb-16-2021
ICN:0 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:99%
Countdown to Fall
Autumn Equinox begins September 22nd at 2:21pm CDT
1 Rain season: Jan 1st to Dec 31st.   2 Snow season July 1st to June 30th.   3 Snow manually measured usually around 7AM and 7PM.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   6 Air Quality Index is provided by Texas Commission on Environmental Quality.   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 1 of just the month of August for this station since 2009.   11 Historical average rain this season to day 1 of August for this station since 2009.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Showers and thunderstorms likely, mainly after 5pm.  Partly sunny, with a high near 96. Heat index values as high as 106. Southwest wind 5 to 10 mph becoming east northeast in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely

Hi 96 °F
NWS forecast: Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 96. Heat index values as high as 106. Southwest wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight

Tonight: Showers and thunderstorms likely, mainly after 3am.  Mostly cloudy, with a low around 74. North northwest wind 10 to 15 mph becoming northeast in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
T-storms
Likely

Lo 74 °F
NWS forecast: Showers and thunderstorms likely, mainly after 3am. Mostly cloudy, with a low around 74. North northwest wind 10 to 15 mph becoming northeast in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
 NWS Short Term Weather Forecast
Monday

Monday: Showers and thunderstorms likely, mainly before 1pm.  Partly sunny, with a high near 89. North northeast wind 10 to 15 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely
Monday
Night
Monday Night: Mostly clear, with a low around 71. East northeast wind 5 to 10 mph.
Mostly Clear
Tuesday

Tuesday: Sunny, with a high near 91. East northeast wind 5 to 10 mph.
Sunny
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 71. East southeast wind 5 to 10 mph.
Partly Cloudy
Wednesday

Wednesday: Mostly sunny, with a high near 92. East wind 5 to 10 mph.
Mostly Sunny
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 72. East wind 5 to 10 mph.
Partly Cloudy
Thursday

Thursday: Mostly sunny, with a high near 94. Southeast wind 5 to 10 mph.
Mostly Sunny
Hi 89 °F Lo 71 °F Hi 91 °F Lo 71 °F Hi 92 °F Lo 72 °F Hi 94 °F
Version 6.95c - 03-Apr-2019 - Script by: Scott of BurnsvilleWeatherLIVE.com
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