This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::CloudWatch::Alarm WarmUpConfiguration
<a name="aws-properties-cloudwatch-alarm-warmupconfiguration"></a>

<a name="aws-properties-cloudwatch-alarm-warmupconfiguration-description"></a>The `WarmUpConfiguration` property type specifies Property description not available. for an [AWS::CloudWatch::Alarm](aws-resource-cloudwatch-alarm.md).

## Syntax
<a name="aws-properties-cloudwatch-alarm-warmupconfiguration-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-cloudwatch-alarm-warmupconfiguration-syntax.json"></a>

```
{
  "[OnlyStartEvaluatingAfterWarmUpPeriodEnds](#cfn-cloudwatch-alarm-warmupconfiguration-onlystartevaluatingafterwarmupperiodends)" : {{Boolean}},
  "[WarmUpPeriodDurationInMinutes](#cfn-cloudwatch-alarm-warmupconfiguration-warmupperioddurationinminutes)" : {{Integer}}
}
```

### YAML
<a name="aws-properties-cloudwatch-alarm-warmupconfiguration-syntax.yaml"></a>

```
  [OnlyStartEvaluatingAfterWarmUpPeriodEnds](#cfn-cloudwatch-alarm-warmupconfiguration-onlystartevaluatingafterwarmupperiodends): {{Boolean}}
  [WarmUpPeriodDurationInMinutes](#cfn-cloudwatch-alarm-warmupconfiguration-warmupperioddurationinminutes): {{Integer}}
```

## Properties
<a name="aws-properties-cloudwatch-alarm-warmupconfiguration-properties"></a>

`OnlyStartEvaluatingAfterWarmUpPeriodEnds`  <a name="cfn-cloudwatch-alarm-warmupconfiguration-onlystartevaluatingafterwarmupperiodends"></a>
Property description not available.  
*Required*: No  
*Type*: Boolean  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`WarmUpPeriodDurationInMinutes`  <a name="cfn-cloudwatch-alarm-warmupconfiguration-warmupperioddurationinminutes"></a>
Property description not available.  
*Required*: No  
*Type*: Integer  
*Minimum*: `1`  
*Maximum*: `2880`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)