Special Weather Statement
NWS Riverton WY ยท US
New
Details
Strong Thunderstorms Will Impact Northwestern Natrona County Through 415 PM MDT
- Event
- Special Weather Statement
- Issued
- Onset
- Message expires
- Category
- Meteorological
- Urgency
- Expected
- Severity
- Moderate
- Certainty
- Observed
- Response
- Execute
Description
Overview
At 331 PM MDT, Doppler radar was tracking a cluster of strong thunderstorms near Waltman, which is 45 miles northwest of Casper, moving northeast at 30 mph.
Hazard
Wind gusts up to 50 mph and half inch hail.
Source
Radar indicated.
Impacts
Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. This storm will remain over mainly rural areas of northwestern Natrona County, including the following locations... Natrona and Arminto.
Instructions
If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways.
Affected areas
- Owl Creek and Bridger Mountains
- Bighorn Mountains Southeast
- Natrona County Lower Elevations
Public contact
- Issuer
- NWS Riverton WY
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~1m6s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M2V6Y37M8HV0TFHNPA8F9TRA
- Identifier
- urn:oid:2.49.0.1.840.0.9a19dec39f586a9188642dbd861798052886109c.001.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS Riverton WY
- AWIPS ID
- CAPRIW
- NWWS sequence
- nwws_processor.6017
- WMO heading
- XOUS55
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- United States (US)
- WMO bulletin number
- 55
Event codes
| Name | Value |
|---|---|
| SAME | SPS |
| NationalWeatherService | SPS |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | SPSRIW |
| WMOidentifier | WWUS85 KRIW 182131 |
| NWSheadline | STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN NATRONA COUNTY THROUGH 415 PM MDT |
| eventMotionDescription | 2026-09-18T21:31:00-00:00...storm...236DEG...24KT...43.11,-107.15 |
| maxWindGust | 50 MPH |
| maxHailSize | 0.50 |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Owl Creek and Bridger Mountains
- Bighorn Mountains Southeast
- Natrona County Lower Elevations
| Name | Value |
|---|---|
| SAME | 056013 |
| SAME | 056017 |
| SAME | 056025 |
| SAME | 056019 |
| SAME | 056043 |
| UGC | WYZ007 |
| UGC | WYZ009 |
| UGC | WYZ020 |
- Polygons
- 42.85,-107.17 42.91,-107.21 42.91,-107.25 43.07,-107.36 43.22,-107.52 43.26,-107.51 43.51,-107.16 43.35,-106.87 43.0,-106.56 42.85,-107.17