Alert archive / Wyoming / Special Weather Statements in 2021
Special Weather Statement, NWS Riverton, WY
NWS Riverton, WY issued this special weather statement at Jul 13, 2021, 6:21 PM MDT for Park County, Wyoming. It was in force for 24 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
- Jul 13, 2021, 6:21 PM MDT (00:21 UTC)
- Expired
- Jul 13, 2021, 6:45 PM MDT
- In force
- 24 min
- Issued by
- NWS Riverton, WY
County Park County, WY
The radar
The Billings radar (KBLX), 154 km from the middle of the area, began a volume at 00:23 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 00:00Z, 0.4 hours before the alert went out and 169 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
- 478 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 3004 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
384 WWUS85 KRIW 140021 SPSRIW Special Weather Statement National Weather Service Riverton WY 621 PM MDT Tue Jul 13 2021 WYZ002>004-140045- North Big Horn Basin-Cody Foothills-Absaroka Mountains- 621 PM MDT Tue Jul 13 2021 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL PARK COUNTY UNTIL 645 PM MDT... At 620 PM MDT, Doppler radar was tracking a strong thunderstorm near Buffalo Bill State Park, or near Cody, moving east at 30 mph. Pea size hail and winds in excess of 30 mph will be possible with this storm. This strong thunderstorm will be near... Cody around 635 PM MDT. Other locations impacted by this storm include Buffalo Bill Dam Visitor Center and Cody Yellowstone Regional Airport. PRECAUTIONARY/PREPAREDNESS ACTIONS... Brief heavy rain will occur with this storm. && LAT...LON 4442 10932 4464 10933 4467 10874 4439 10874 TIME...MOT...LOC 0020Z 269DEG 27KT 4452 10919 $$ AR
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 6:00 PM MDT | Special Weather Statement | RIW | Natrona | 30 min |
| Jul 13, 6:10 PM MDT | Special Weather Statement | RIW | Natrona | 35 min |
| Jul 13, 6:14 PM MDT | Special Weather Statement | RIW | Natrona | 31 min |
| Jul 13, 6:46 PM MDT | Special Weather Statement | RIW | Natrona | 44 min |
| Jul 13, 6:53 PM MDT | Special Weather Statement | RIW | Big Horn | 37 min |
| Jul 13, 7:06 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 24 min |
| Jul 13, 7:28 PM MDT | Special Weather Statement | RIW | Big Horn | 32 min |
| Jul 14, 12:01 AM MDT | Special Weather Statement | RIW | Hot Springs | 29 min |
Nearby
Special Weather Statements in Wyoming, 2021Every special weather statement in 2021
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.