Alert archive / Wyoming / Special Weather Statements in 2018
Special Weather Statement, NWS Riverton, WY
NWS Riverton, WY issued this special weather statement at Aug 5, 2018, 3:40 PM MDT. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2018, 3:40 PM MDT (21:40 UTC)
- Expired
- Aug 5, 2018, 4:15 PM MDT
- In force
- 35 min
- Issued by
- NWS Riverton, WY
The radar
The Riverton/Lander radar (KRIW), 85 km from the middle of the area, began a volume at 21:43 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.7 hours before the alert went out and 89 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2495 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before this special weather statement went out at Aug 5, 1:37 PM MDT, 2 hours 3 minutes earlier.
Area forecast discussion, Aug 5, 1:37 PM MDT, 2 hours 3 minutes before
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</html>Hazardous weather outlook, Aug 5, 2:08 AM MDT, 13 hours 32 minutes before
Hazardous Weather Outlook...CORRECTED National Weather Service Riverton WY 208 AM MDT Sun Aug 5 2018 WYZ001>020-022>030-061115- Yellowstone National Park-Absaroka Mountains-Cody Foothills- North Big Horn Basin-Southwest Big Horn Basin- Southeast Big Horn Basin-Owl Creek and Bridger Mountains- Bighorn Mountains West-Bighorn Mountains Southeast- Northeast Johnson County-Southeast Johnson County- Teton and Gros Ventre Mountains-Jackson Hole- Wind River Mountains West-Wind River Mountains East- Upper Wind River Basin-Wind River Basin-Lander Foothills- Green Mountains and Rattlesnake Range- Natrona County Lower Elevations-Casper Mountain-Star Valley- Salt River and Wyoming Ranges-Upper Green River Basin Foothills- Upper Green River Basin-South Lincoln County- Rock Springs and Green River-Flaming Gorge-East Sweetwater County- 208 AM MDT Sun Aug 5 2018 ...Red Flag Warning in effect for Sweetwater, Uinta and southern Lincoln counties from 12pm to 9pm today... This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight. Warm temperatures with gusty west winds will bring critical fire weather conditions across southern and southwestern Wyoming during the afternoon and early evening. Isolated to scattered afternoon and evening thunderstorms across northern and central Wyoming. Some thunderstorms in Southeast Natrona County, including the city of Casper, could become severe with large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Monday through Saturday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report wind gusts of 45 mph or greater as well as hail size. Thank you. TEAM RIVERTON
In the hours before
Special weather statement, Aug 5, 12:49 PM MDT, 2 hours 51 minutes before
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</html>Special weather statement, Aug 5, 1:19 PM MDT, 2 hours 21 minutes before
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</html>Special weather statement, Aug 5, 2:12 PM MDT, 1 hour 28 minutes before
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<p id="message1">
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</html>Special weather statement, Aug 5, 2:44 PM MDT, 56 minutes before
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</html>Special weather statement, Aug 5, 3:37 PM MDT, 3 minutes before
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<div class="status" id="status">Temporary Notice</div>
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</html>Special weather statement, Aug 5, 3:40 PM MDT, 0 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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</html>The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:22 PM MDT | Special Weather Statement | RIW | Sweetwater | 53 min |
| Aug 5, 7:52 AM MDT | Special Weather Statement | RIW | Sweetwater | 38 min |
| Aug 5, 8:31 AM MDT | Special Weather Statement | RIW | Sweetwater | 44 min |
| Aug 5, 9:15 AM MDT | Special Weather Statement | RIW | 45 min | |
| Aug 5, 9:50 AM MDT | Special Weather Statement | RIW | 40 min | |
| Aug 5, 10:31 AM MDT | Special Weather Statement | RIW | 44 min | |
| Aug 5, 10:40 AM MDT | Special Weather Statement | RIW | Teton | 35 min |
| Aug 5, 11:15 AM MDT | Special Weather Statement | RIW | Teton | 30 min |
| Aug 5, 11:17 AM MDT | Special Weather Statement | RIW | 28 min | |
| Aug 5, 11:42 AM MDT | Special Weather Statement | RIW | 33 min | |
| Aug 5, 11:44 AM MDT | Special Weather Statement | RIW | Teton | 31 min |
| Aug 5, 11:49 AM MDT | Special Weather Statement | RIW | Big Horn | 26 min |
| Aug 5, 12:11 PM MDT | Special Weather Statement | RIW | Park | 34 min |
| Aug 5, 12:16 PM MDT | Special Weather Statement | RIW | Big Horn | 29 min |
| Aug 5, 12:30 PM MDT | Special Weather Statement | RIW | Park | 30 min |
| Aug 5, 12:47 PM MDT | Special Weather Statement | RIW | Park | 28 min |
| Aug 5, 12:49 PM MDT | Special Weather Statement | RIW | Big Horn | 26 min |
| Aug 5, 1:19 PM MDT | Special Weather Statement | RIW | Park | 26 min |
| Aug 5, 2:12 PM MDT | Special Weather Statement | RIW | 48 min | |
| Aug 5, 2:44 PM MDT | Special Weather Statement | RIW | Sublette | 31 min |
| Aug 5, 3:37 PM MDT | Special Weather Statement | RIW | Fremont | 23 min |
| Aug 5, 3:57 PM MDT | Special Weather Statement | RIW | Fremont | 33 min |
| Aug 5, 4:08 PM MDT | Special Weather Statement | RIW | Natrona | 52 min |
| Aug 5, 4:13 PM MDT | Special Weather Statement | RIW | 62 min | |
| Aug 5, 4:21 PM MDT | Special Weather Statement | RIW | 24 min | |
| Aug 5, 4:22 PM MDT | Special Weather Statement | RIW | 38 min | |
| Aug 5, 4:35 PM MDT | Special Weather Statement | RIW | Natrona | 40 min |
| Aug 5, 4:41 PM MDT | Special Weather Statement | RIW | 34 min | |
| Aug 5, 4:50 PM MDT | Severe Thunderstorm Warning | RIW | Sweetwater | 40 min |
| Aug 5, 5:10 PM MDT | Special Weather Statement | RIW | Teton | 50 min |
| Aug 5, 5:23 PM MDT | Special Weather Statement | RIW | Natrona | 52 min |
| Aug 5, 5:30 PM MDT | Special Weather Statement | RIW | 30 min |
Nearby
Special Weather Statements in Wyoming, 2018Every special weather statement in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.