Alert archive / Wyoming / Special Weather Statements in 2011
Special Weather Statement, NWS Riverton, WY
NWS Riverton, WY issued this special weather statement at Aug 7, 2011, 4:21 PM MDT for Teton County, Wyoming. It was in force for 39 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 7, 2011, 4:21 PM MDT (22:21 UTC)
- Expired
- Aug 7, 2011, 5:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Riverton, WY
County Teton County, WY
The radar
The Pocatello radar (KSFX), 213 km from the middle of the area, began a volume at 22:21 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, 10.4 hours before the alert went out and 252 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
- 3301 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
710
WWUS85 KRIW 072221
SPSRIW
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
421 PM MDT SUN AUG 7 2011
WYZ001-072300-
YELLOWSTONE NATIONAL PARK WY-
421 PM MDT SUN AUG 7 2011
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN PARK AND NORTHWESTERN
TETON COUNTIES IN NORTHWEST WYOMING UNTIL 500 PM MDT...
AT 415 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR MYSTIC FALLS...OR 18 MILES SOUTHEAST OF WEST
YELLOWSTONE...MOVING EAST AT 30 MPH.
WIND GUSTS UP TO 40 TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG
WITH FREQUENT DANGEROUS LIGHTNING.
THIS STORM WILL BE NEAR...
OLD FAITHFUL...KEPLER CASCADES...SCAUP LAKE...LOWER BASIN LAKE AND
FOUNTAIN PAINT POT AROUND 425 PM MDT.
CRAIG PASS AROUND 435 PM MDT.
GRAND LOOP RD GRANT TO LAKE AND LAKE AROUND 500 PM MDT.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.
LAT...LON 4447 11104 4453 11105 4453 11104 4465 11029
4441 11024 4435 11105 4446 11105
TIME...MOT...LOC 2220Z 261DEG 24KT 4447 11085
$$
LIPSONThe office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 1:58 PM MDT | Special Weather Statement | RIW | Hot Springs | 47 min |
| Aug 7, 2:49 PM MDT | Special Weather Statement | RIW | Washakie | 41 min |
| Aug 7, 2:58 PM MDT | Special Weather Statement | RIW | Hot Springs | 47 min |
| Aug 7, 3:17 PM MDT | Special Weather Statement | RIW | Park | 43 min |
| Aug 7, 3:18 PM MDT | Special Weather Statement | RIW | 42 min | |
| Aug 7, 3:32 PM MDT | Special Weather Statement | RIW | Washakie | 43 min |
| Aug 7, 3:50 PM MDT | Special Weather Statement | RIW | 40 min | |
| Aug 7, 3:55 PM MDT | Special Weather Statement | RIW | 50 min | |
| Aug 7, 3:56 PM MDT | Special Weather Statement | RIW | Fremont | 49 min |
| Aug 7, 3:57 PM MDT | Special Weather Statement | RIW | Park | 48 min |
| Aug 7, 4:16 PM MDT | Special Weather Statement | RIW | Washakie | 44 min |
| Aug 7, 5:05 PM MDT | Special Weather Statement | RIW | Fremont | 25 min |
| Aug 7, 5:26 PM MDT | Special Weather Statement | RIW | Hot Springs | 49 min |
Nearby
Special Weather Statements in Wyoming, 2011Every special weather statement in 2011
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.