Heat Advisory HEAT ADVISORY - Collin County
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Updated: 27-Jul-2017 @ 5:45pm  
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.8°F than last hour.

97.8°F

Heat Index:  107.4°F
Danger Heat
High Today
99.5°F
4:31 PM
Low Today
79.8°F
6:44 AM
Yest High
97.4°F
4:50 PM
Yest Low
78.0°F
6:47 AM
Sta* High
105.2°F
2014
Sta* Low
71.6°F
2013
* This Station's Records Since 10/2009
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Cloudy, Dry Cloudy, Dry

Wind from S Wind:  S
5.9

Gusting to:
7.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
31.3 of 100
This
Afternoon
This Afternoon: Mostly sunny and hot, with a high near 99. Heat index values as high as 107. South southwest wind around 15 mph.
Hot
Tonight

Tonight: Partly cloudy, with a low around 80. South wind around 10 mph.
Partly Cloudy
Friday

Friday: Partly sunny and hot, with a high near 100. Heat index values as high as 106. South southwest wind 5 to 10 mph becoming west northwest in the afternoon.
Hot
Hi 99 °F Lo 80 °F Hi 100 °F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 1.3°F since last hour. 72.2°F
Last Hour: Increased 1.3°F since last hour. 1.3°F
High 1:19 PM: 75.0°F
Low 5:11 PM: 69.0°F
Record High: 80.6°F on
23-Jun-2017
Record Low: -3.6°F on
27-Jan-2014
Wetbulb: 79.9°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.86 in
Jul Rain: 3.64 in
Jul to Date
  Avg:10
2.14 in
Jul to Date
  Diff from Avg:10
Over 1.5 in for the month 1.50 in
Jul Avg: 2.78 in
Diff from Avg: Over 0.86 in for the month 0.86 in
Season:1 27.56 in
YTD
  Avg:11
24.00 in
YTD
  Diff from Avg:11
Over 3.56 in for the year 3.56 in
Last Rain
Time/Date:
24-Jul-2017
at 3:48 AM
55 rain days in 2017
9 days in July
2 days since last rain
Current: S  5.9 mph
1Hr Average: 3.9 mph
Wind Run: 93.51 miles
Wind Gust
Current: 7.0 mph mph
Today: 21.0 mph 2:07 AM
Month: 39.0 mph 23-Jul
Year: 63.3 mph 29-Mar
Record Gust: 63.3 mph
29-Mar-2017
Sunlight:
13 hrs 54 min
of Sunlight Today
graph 57.9% 42.1%
Which is
1 min 22 sec Shorter
Than Yesterday
 

Evening Crescent, 4 days, 13 hours, 2 minutes in cycle
22%
Illuminated
Humidity Barometer
Current: Increased 3% since last hour. 44%
Last Hour: Increased 3% since last hour. 3%
High 6:32 AM: 78%
Low 4:32 PM: 39%
Record High: 100%
6-Oct-2009
Record Low: 14%
4-Mar-2012
Current: Falling 0.022  inHg/hr 29.819 inHg
Last Hour: Falling slowly
High 9:58 AM: 29.956 in.
Low 5:40 PM: 29.818 in.
Record High: 30.806 inHg
7-Jan-2017
Record Low: 29.323 inHg
21-Jan-2017
Cooling Degree Days Snow3 Heat Index Air
Today: 14.5
Jul: 521.4
2017 to Date: 1457.9
Heating Degree Days
2017 to Date: 887.8
Today: 0.00 in
Yesterday: 0.00 in
Jul Snow: No Change 0.00 in
Jul 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 July
0 snow days this season.2
First Snow of Season:
6-Jan-2017
Average 1st Snow:
12 of Dec
Current: 107.4°F
High 3:36pm: 110.7°F
Yesterday: 108.7°F
Record: 121.5°F
12-Aug-2016
Quality
Index6:

101


Unhealthy for Sensitive Groups

Density:
1.124 kg/m3
Current UV Index Current Solar Energy
0.7
Sunburn in
160 Minutes
Highest:
1:27 PM
7.8
209 W/m2
38%
W/m2 SI Solar % SI
High Today:
1:30 PM
905  W/m2
Record:
1480 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 67.7°F
Sunrise: 6:36 am
Sunset: 8:30 pm
Moonrise: 11:02 am
Moonset: 10:56 pm
Full Moon: 07-Aug-2017
New Moon: 18:31 UTC
21-Aug-2017
Updated at Midnight
Current ET: 0.39 in
7-Days Rain: 0.86 in
7-Days ET: 1.97 in
7-Day:  1.11 in water in deficit of what evaporated in last 7 days. 1.11 in
July:  2.64 in water in deficit of what evaporated this month. 2.64 in
HIGHS: LOWS:
109.4°F
3-Aug-2011
12.0°F
2-Feb-2011
Daytime Records
  108.3°F
10-Aug-2015
  16.3°F
02-Feb-2011
Nitetime Records
  96.8°F
04-Aug-2011
  13.1°F
02-Feb-2011
ICN:19 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:99%
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.   10 Historical average only to day 27 of just the month of July for this station since 2009.   11 Historical average rain this season to day 27 of July for this station since 2009.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Mostly sunny and hot, with a high near 99. Heat index values as high as 107. South southwest wind around 15 mph.
Hot

Hi 99 °F
NWS forecast: Mostly sunny and hot, with a high near 99. Heat index values as high as 107. South southwest wind around 15 mph.
Tonight

Tonight: Partly cloudy, with a low around 80. South wind around 10 mph.
Partly Cloudy

Lo 80 °F
NWS forecast: Partly cloudy, with a low around 80. South wind around 10 mph.
 NWS Short Term Weather Forecast
Friday

Friday: Partly sunny and hot, with a high near 100. Heat index values as high as 106. South southwest wind 5 to 10 mph becoming west northwest in the afternoon.
Hot
Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 78. Calm wind becoming northeast around 5 mph after midnight.
Chance
T-storms
Saturday

Saturday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 95. North northeast wind 5 to 10 mph.
Slight Chance
T-storms
Saturday
Night
Saturday Night: Partly cloudy, with a low around 74. East wind 5 to 10 mph.
Partly Cloudy
Sunday

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

Monday: Mostly sunny, with a high near 91. East northeast wind 5 to 10 mph.
Mostly Sunny
Hi 100 °F Lo 78 °F Hi 95 °F Lo 74 °F Hi 92 °F Lo 72 °F Hi 91 °F
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