Katy, Texas Weather Conditions

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Current Conditions

  • 86°
  • Mostly Cloudy
  • Wind: ESE 6 mph
  • Humidity: 100%
  • Visibility: 10.0 miles
  • Dew Point: 86°
  • Pressure: 30.05 in. +
  • Heat Index: 112

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Next 12 Hours

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84°
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73°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of a Thunderstorm
  • High: 88 °
  • Low: 72 °
  • Chance of T-Storms
  • Wednesday
  • Chance of a Thunderstorm
  • High: 82 °
  • Low: 73 °
  • Chance of T-Storms
  • Thursday
  • Chance of a Thunderstorm
  • High: 81 °
  • Low: 70 °
  • Chance of T-Storms
  • Friday
  • Chance of a Thunderstorm
  • High: 82 °
  • Low: 72 °
  • Chance of a Thunderstorm
  • Saturday
  • Chance of a Thunderstorm
  • High: 91 °
  • Low: 73 °
  • Chance of a Thunderstorm

Forecast for Katy, Texas

Updated: 10:00 AM CDT on September 16, 2014

  • Tuesday

    Overcast with a chance of a thunderstorm and a chance of rain. High of 88F. Winds from the ESE at 5 to 10 mph. Chance of rain 50%.

  • Tuesday Night

    Overcast with a chance of a thunderstorm and a chance of rain. Low of 72F. Winds less than 5 mph. Chance of rain 30%.

  • Wednesday

    Overcast with a chance of a thunderstorm and a chance of rain. High of 82F with a heat index of 88F. Winds less than 5 mph. Chance of rain 50%.

  • Wednesday Night

    Overcast with a chance of a thunderstorm and a chance of rain. Fog overnight. Low of 73F. Winds from the SE at 5 to 10 mph. Chance of rain 30%.

  • Thursday

    Overcast with a chance of a thunderstorm and a chance of rain. High of 81F. Winds less than 5 mph. Chance of rain 50%.

  • Thursday Night

    Mostly cloudy with a chance of a thunderstorm and a chance of rain in the evening, then overcast. Fog overnight. Low of 70F. Winds from the East at 5 to 10 mph.

  • Friday

    Partly cloudy in the morning, then overcast with a chance of a thunderstorm and rain. High of 82F. Winds from the East at 5 to 10 mph. Chance of rain 20%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm and rain. Fog overnight. Low of 72F. Winds from the ESE at 5 to 10 mph.

  • Saturday

    Partly cloudy in the morning, then overcast with a chance of a thunderstorm and rain. Fog early. High of 91F. Winds from the SE at 5 to 10 mph. Chance of rain 20%.

  • Saturday Night

    Partly cloudy. Low of 73F. Winds from the SSE at 5 to 10 mph.

  • Sunday

    Mostly cloudy with a chance of a thunderstorm. High of 86F with a heat index of 93F. Winds less than 5 mph. Chance of rain 40%.

  • Sunday Night

    Mostly cloudy with a chance of rain. Low of 70F. Winds from the North at 5 to 10 mph. Chance of rain 40%.

  • Monday

    Mostly cloudy. High of 84F. Winds from the NNE at 5 to 10 mph.

  • Monday Night

    Partly cloudy. Low of 66F. Winds from the NNE at 5 to 10 mph.

  • Tuesday

    Mostly cloudy. High of 82F. Winds from the NNE at 5 to 10 mph.

  • Tuesday Night

    Overcast. Low of 61F. Winds from the NNE at 5 to 10 mph.

  • Wednesday

    Overcast. High of 81F. Winds from the NNE at 5 to 10 mph.

  • Wednesday Night

    Overcast. Low of 61F. Winds from the NNE at 5 to 10 mph.

  • Thursday

    Mostly cloudy. High of 79F. Winds from the North at 5 to 10 mph.

  • Thursday Night

    Mostly cloudy. Low of 61F. Winds from the NNE at 5 to 10 mph.

  • Friday

    Partly cloudy. High of 81F. Winds from the NNE at 5 to 10 mph.

  • Friday Night

    Clear. Low of 61F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Waterstone, Katy, TX

Updated: 12:10 PM CDT

Temperature: 88.5 °F Dew Point: 79 °F Humidity: 73% Wind: NNE at 2.7 mph Pressure: 29.71 in Hourly Precipitation: - Heat Index: 103 °F Graphs

Location: Waterstone - West, Katy, TX

Updated: 12:25 PM CDT

Temperature: 89.6 °F Dew Point: 77 °F Humidity: 66% Wind: South at 2.5 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

Location: Westlake Forest, Houston, TX

Updated: 12:24 PM CDT

Temperature: 87.4 °F Dew Point: 73 °F Humidity: 63% Wind: NW at 3.7 mph Pressure: 29.85 in Hourly Precipitation: - Heat Index: 95 °F Graphs

Location: Deerfield Village, Houston, TX

Updated: 12:23 PM CDT

Temperature: 89.3 °F Dew Point: 77 °F Humidity: 67% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

Location: Nottingham Country, Katy, TX

Updated: 12:25 PM CDT

Temperature: 92.8 °F Dew Point: 75 °F Humidity: 57% Wind: SE at 3.4 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 105 °F Graphs

Location: Cimarron, Katy, TX

Updated: 12:20 PM CDT

Temperature: 88.1 °F Dew Point: 77 °F Humidity: 69% Wind: North at 2.7 mph Pressure: 29.93 in Hourly Precipitation: - Heat Index: 100 °F Graphs

Location: Westminster Landing, Houston, TX

Updated: 12:20 PM CDT

Temperature: 88.9 °F Dew Point: 77 °F Humidity: 68% Wind: SSE at 3.0 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

Location: Westglen/Bear Creek, Houston, TX

Updated: 12:25 PM CDT

Temperature: 95.0 °F Dew Point: 75 °F Humidity: 53% Wind: West at 2.2 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 107 °F Graphs

Location: Windsor Park Estates, Houston, TX

Updated: 12:22 PM CDT

Temperature: 85.1 °F Dew Point: 80 °F Humidity: 86% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Nottingham Country Section 8, Katy, TX

Updated: 12:25 PM CDT

Temperature: 86.5 °F Dew Point: 76 °F Humidity: 71% Wind: SSE at 3.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Canyon Lakes West, Cypress, TX

Updated: 12:25 PM CDT

Temperature: 91.6 °F Dew Point: 79 °F Humidity: 66% Wind: ESE at 2.0 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: 108 °F Graphs

Location: Kelliwood, Katy, TX

Updated: 12:25 PM CDT

Temperature: 88.2 °F Dew Point: 78 °F Humidity: 71% Wind: North at - Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Creekstone, Katy, TX

Updated: 12:25 PM CDT

Temperature: 86.7 °F Dew Point: 77 °F Humidity: 72% Wind: SSE at 3.6 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Sommerall, Houston, TX

Updated: 12:24 PM CDT

Temperature: 90.5 °F Dew Point: 77 °F Humidity: 65% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 104 °F Graphs

Location: Cinco Ranch Meadow Green, Katy, TX

Updated: 12:15 PM CDT

Temperature: 86.4 °F Dew Point: 79 °F Humidity: 79% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Heritage Towne Lake, Cypress, TX

Updated: 12:25 PM CDT

Temperature: 88.8 °F Dew Point: 76 °F Humidity: 65% Wind: ENE at 2.0 mph Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Southcreek, Copperfield, Houston, TX

Updated: 12:25 PM CDT

Temperature: 91.7 °F Dew Point: 80 °F Humidity: 69% Wind: Calm Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 110 °F Graphs

Location: Falcon Landing, Katy, TX

Updated: 12:13 PM CDT

Temperature: 85.7 °F Dew Point: 79 °F Humidity: 79% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Copperfield - Copper Lakes - ManorSide, Houston, TX

Updated: 12:25 PM CDT

Temperature: 93.1 °F Dew Point: 78 °F Humidity: 61% Wind: East at 2.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 108 °F Graphs

Location: Copperfield - Copper Lakes - Waterford, Houston, TX

Updated: 12:25 PM CDT

Temperature: 90.9 °F Dew Point: 81 °F Humidity: 72% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 110 °F Graphs

Location: Cinco Ranch Equestrian Village, Katy, TX

Updated: 12:22 PM CDT

Temperature: 86.4 °F Dew Point: 74 °F Humidity: 68% Wind: South at 1.6 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Concord Colony - K5EBQ, Houston, TX

Updated: 12:13 PM CDT

Temperature: 89.0 °F Dew Point: 78 °F Humidity: 71% Wind: Calm Pressure: 30.03 in Hourly Precipitation: - Heat Index: 104 °F Graphs

Location: Lake Pointe Estates, Katy, TX

Updated: 12:11 PM CDT

Temperature: 86.6 °F Dew Point: 79 °F Humidity: 77% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Copper Village, Houston, TX

Updated: 12:25 PM CDT

Temperature: 89.8 °F Dew Point: 77 °F Humidity: 67% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 103 °F Graphs

Location: Falcon Ranch, Katy, TX

Updated: 12:25 PM CDT

Temperature: 86.1 °F Dew Point: 78 °F Humidity: 76% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Middlegate Village, Houston, TX

Updated: 12:25 PM CDT

Temperature: 92.1 °F Dew Point: 76 °F Humidity: 60% Wind: SE at 3.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 105 °F Graphs

Location: Cinco Forest, Katy, TX

Updated: 12:25 PM CDT

Temperature: 84.2 °F Dew Point: 80 °F Humidity: 87% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Arbor At Willow Fork, Katy, TX

Updated: 12:20 PM CDT

Temperature: 85.1 °F Dew Point: 78 °F Humidity: 80% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: American Shooting Centers, Houston, TX

Updated: 12:12 PM CDT

Temperature: 80.9 °F Dew Point: 77 °F Humidity: 87% Wind: North at 1.0 mph Pressure: 30.12 in Hourly Precipitation: 0.16 in Heat Index: 88 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Houston/Galveston Texas 
1205 PM CDT Tuesday Sep 16 2014 


Discussion... 
see aviation for 18z taf issuance. 


&& 


Aviation... 
showers and thunderstorms are starting to form and concentrate 
inland this afternoon. This appears to be along a boundary at 
850 mb. Currents precipitable waters  from GPS met are around 2.20" with k index 
values in the middle 30s. Lift today will come from day time heating 
and a tropical wave currently moving into Mexico. High res models 
are showing precipitation continuing to expand in coverage inland and 
eventually filling in today. Coverage will likely fill around 
Interstate 10 north to about kuts. High res models then quickly 
dissipate showers and thunderstorms this evening. Expect showers 
and thunderstorms to redevelop tomorrow as high moisture values 
remain in place. 23 


&& 


Previous discussion... /issued 1031 am CDT Tuesday Sep 16 2014/ 


Discussion... 
with area precipitable water values now well above two inches and 
expected to remain around that level for the next several days... 
anticipate daily rounds of showers and thunderstorms with activity 
generally developing near the coast and offshore during the late 
night through early morning hours and then inland during the late 
morning through early evening hours. Today through Thursday...a 
quick 1/2 to 1 inch of rain is expected to be very common...and 
several rounds of these could easily lead to some localized flooding. 
Where training sets up...daily totals of 3 to 4 inches would not 
be unexpected. 


Only change to the grids for the morning update was to lower today's 
afternoon high temperatures a degree or two to account for expected 
cloud and rainfall coverage. 42 


Previous discussion... /issued 531 am CDT Tuesday Sep 16 2014/ 


Discussion... 
a somewhat complicated pattern for southeast Texas these next several days 
as a couple of different features combine/interact and give US a 
rather wet forecast. Deep tropical moisture associated with the east- 
Erly wave moving into southeast Texas this morning (as evident by the precipitation 
developing/tracking inland from the coastal waters). This deeper 
moisture (2-2.3" pws) forecast to linger over the region the rest of 
the week as the Gulf remains wide open. Over the northern counties we 
are still seeing radar echoes (light pcpn) streaming across from 
the W/NW...partly associated with Odile (which is currently loca- 
ted over the middle cali baja). The remnants of Odile will eventual- 
ly get caught up into the main upper flow and begin moving east-northeastward 
the next few days. This will help to provide the lift for scattered to 
numerous rain showers/thunderstorms and rain showers today and tomorrow. Elevated probability of precipitation could stay 
in place through Thursday given the prognosticated slow movement of the variable- 
ious systems. Looking ahead...extended models in slightly better 
agreement with the timing of the next cold front. The arrival of 
a cooler/drier airmass late sun/early Monday should bring an end to 
the rains. 41 


Marine... 
scattered to numerous showers and thunderstorms over the coastal 
waters developing and continuing on the SW flank of the middle level 
ridging with weak troughing offshore. This pattern remains in 
place this morning then as tropical wave in the far southwestern 
Bay of Campeche shears out expect the axis of convergence to shift 
west and north with coverage decreasing in the evening. Light 
easterly winds in the bays should become southeasterly and 
increase a little today. Onshore flow remain generally 
southeasterly through the remainder of the forecast. GFS and European model (ecmwf) 
generally in agreement with another cold front moving into the 
coastal waters Monday late or early Tuesday...may reach scec in 
the wake as front moves out into the central Gulf. 45 


Aviation... 
expect that today the terminals will be plagued with showers and 
thunderstorms spreading east and southeast in from the coast this 
morning and then developing inland and moving in from the south 
and southwest this afternoon. 45 


&& 


Preliminary point temps/pops... 
College Station (cll) 74 91 74 90 72 / 30 50 30 40 20 
Houston (iah) 75 92 74 91 74 / 30 60 30 50 20 
Galveston (gls) 79 89 79 88 78 / 40 60 40 50 30 


&& 


Hgx watches/warnings/advisories... 
Texas...none. 
GM...none. 
&& 


$$ 


Discussion...42 
aviation/marine...23 






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