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Allen weather alerts

1 active alert for Allen, Texas right now: a Heat Advisory.

4 in the last 30 days 4 in 12 months (since Aug 30) most common: Heat Advisory Get alerts on your phone →

Active alerts for Collin County

NWS issues alerts by county; Allen is in Collin County. Refreshed every few minutes; times in CDT.

Moderate Expected

Heat Advisory

Issued Sun, Sep 6, 3:21 PM CDT by NWS Fort Worth TX Until Mon, Sep 7, 8:00 PM CDT (in 21 hr)

Area: Montague; Cooke; Grayson; Wise; Denton; Collin; Hunt; Delta; Hopkins; Tarrant; Dallas; Rockwall; Kaufman; Van Zandt; Rains; Johnson; Ellis; Henderson; Navarro

* WHAT...Heat index values up to 106. * WHERE...Portions of north central and northeast Texas. * WHEN...Until 8 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities.

What it means: Heat index values high enough to cause heat illness with prolonged exposure. Drink water, stay in air conditioning and check on neighbours.

Full alert with map and forecast →

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Where

Collin County on the map

Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.

Last 30 days

Recent alerts for Collin County

Alert	Issued	Ended	Issued by
Heat Advisory	12:13 PM	8:00 PM	Fort Worth TX
Heat Advisory	12:09 AM	8:00 PM	Fort Worth TX
Heat Advisory	Sep 5, 12:25 PM	8:00 PM	Fort Worth TX

Pattern

What Collin County gets alerted for

Every alert that named Collin County in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.

Heat Advisory

Plain English

What these alerts mean

A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.

Heat Advisory

Heat index values high enough to cause heat illness with prolonged exposure. Drink water, stay in air conditioning and check on neighbours.

Nearby

Alerts near Allen

Cities

Plano, TX1 McKinney, TX1 Frisco, TX1 Richardson, TX1 Wylie, TX1 Garland, TX1

Neighbouring counties in Texas

Rockwall County1 Dallas County1 Grayson County1 Hunt County1 Denton County1 Fannin County1 All of Texas →

Questions

About Allen alerts

How do I get Allen weather alerts on my iPhone?

Install Forecast Bar, add Allen as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Collin County then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.

Where do these alerts come from?

From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names Collin County, the county Allen sits in. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.

What is the difference between a watch, a warning and an advisory?

A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.

Can I get this data as JSON?

Yes. /weather-alerts/tx/allen.json returns the active alerts, the last 30 days and the 12-month counts for Allen, refreshed every minute. Please cache responses and credit National Weather Service as the source.

Never find out about a Collin County alert from this page again

Add Allen in Forecast Bar and every NWS warning, watch and advisory arrives as a push notification the moment it is issued, on iPhone, iPad, Apple Watch, Mac and Apple TV.

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