Alert archive / Wyoming / Tornado Warnings in 2018
Tornado Warning 13, NWS Riverton, WY
NWS Riverton, WY issued this tornado warning at Jun 29, 2018, 11:50 AM MDT for Washakie County, Wyoming. It was in force for 25 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 29, 2018, 11:50 AM MDT (17:50 UTC)
- Expired
- Jun 29, 2018, 12:15 PM MDT
- In force
- 25 min
- Issued by
- NWS Riverton, WY
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 115 km from the middle of the area, began a volume at 17:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 12:14 PM MDT | FUNNEL CLOUD | 14 Nw Worland, WY |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 5.8 hours before the alert went out and 115 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
- 256 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 1500 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted.
656
WFUS55 KRIW 291750
TORRIW
WYC043-291815-
/O.NEW.KRIW.TO.W.0013.180629T1750Z-180629T1815Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Riverton WY
1150 AM MDT FRI JUN 29 2018
The National Weather Service in Riverton has issued a
* Tornado Warning for...
Northwestern Washakie County in central Wyoming...
* Until 1215 PM MDT.
* At 1150 AM MDT, a severe thunderstorm capable of producing a
tornado was located 20 miles south of Otto, or 20 miles west of
Worland, moving northeast at 15 to 20 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This tornadic thunderstorm will remain over mainly rural areas of
northwestern Washakie County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4402 10846 4415 10853 4417 10844 4417 10816
4407 10806
TIME...MOT...LOC 1750Z 242DEG 14KT 4411 10838
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
CNJ1 follow-up statement
142
WWUS55 KRIW 291803
SVSRIW
Severe Weather Statement
National Weather Service Riverton WY
1203 PM MDT FRI JUN 29 2018
WYC043-291815-
/O.CON.KRIW.TO.W.0013.000000T0000Z-180629T1815Z/
Washakie-
1203 PM MDT FRI JUN 29 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 PM MDT FOR
NORTHWESTERN WASHAKIE COUNTY...
At 1202 PM MDT, a severe thunderstorm capable of producing a tornado
was located 17 miles northwest of Worland, moving east at 25 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
northwestern Washakie County around Platte Pipeline Road and 15 Mile
Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4407 10833 4414 10837 4417 10834 4417 10816
4407 10806
TIME...MOT...LOC 1802Z 254DEG 20KT 4413 10828
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
CNJThe office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 8:29 PM MDT | Special Weather Statement | RIW | Big Horn | 46 min |
| Jun 29, 10:39 AM MDT | Special Weather Statement | RIW | Big Horn | 36 min |
| Jun 29, 11:10 AM MDT | Special Weather Statement | RIW | Hot Springs | 35 min |
| Jun 29, 11:14 AM MDT | Tornado Warning | RIW | Big Horn, Washakie | 16 min |
| Jun 29, 11:28 AM MDT | Tornado Warning | RIW | Big Horn, Washakie | 32 min |
| Jun 29, 11:33 AM MDT | Special Weather Statement | RIW | Big Horn | 42 min |
| Jun 29, 11:46 AM MDT | Special Weather Statement | RIW | Big Horn | 44 min |
| Jun 29, 11:58 AM MDT | Tornado Warning | RIW | Big Horn | 32 min |
| Jun 29, 12:15 PM MDT | Tornado Warning | RIW | Big Horn, Washakie | 30 min |
| Jun 29, 12:25 PM MDT | Special Weather Statement | RIW | Johnson | 35 min |
| Jun 29, 12:37 PM MDT | Special Weather Statement | RIW | Big Horn | 23 min |
| Jun 29, 12:46 PM MDT | Special Weather Statement | RIW | Washakie | 29 min |
| Jun 29, 12:55 PM MDT | Special Weather Statement | RIW | Johnson | 35 min |
| Jun 29, 12:59 PM MDT | Special Weather Statement | RIW | Big Horn | 46 min |
| Jun 29, 1:09 PM MDT | Special Weather Statement | RIW | Washakie | 36 min |
| Jun 29, 1:12 PM MDT | Special Weather Statement | RIW | 33 min | |
| Jun 29, 1:17 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn, Johnson | 43 min |
| Jun 29, 1:25 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 35 min |
| Jun 29, 1:57 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 33 min |
Nearby
Tornado Warnings in Wyoming, 2018Every tornado warning in 2018Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.