Alert archive / Wyoming / Tornado Warnings in 2018
Tornado Warning 18, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 19, 2018, 2:42 PM MDT for Goshen County, Laramie County, Platte County, Wyoming. It was in force for 48 min. 2 reports 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 19, 2018, 2:42 PM MDT (20:42 UTC)
- Expired
- Jun 19, 2018, 3:30 PM MDT
- In force
- 48 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 44 km from the middle of the area, began a volume at 20:41 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 19, 2:54 PM MDT | TORNADO | 25 N Cheyenne, WY | PUBLIC REPORT OF A SMALL TORNADO 1/2 MILE TO THE WEST OF INTERSTATE 25. |
| Jun 19, 2:54 PM MDT | TORNADO | 25 N Cheyenne, WY | PUBLIC REPORT OF A SMALL TORNADO 1/2 MILE TO THE WEST OF INTERSTATE 25 AT MILE MARKER 34. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.7 hours before the alert went out and 228 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
- 30 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
410
WFUS55 KCYS 192042
TORCYS
WYC015-021-031-192130-
/O.NEW.KCYS.TO.W.0018.180619T2042Z-180619T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
242 PM MDT TUE JUN 19 2018
The National Weather Service in Cheyenne has issued a
* Tornado Warning for...
Southwestern Goshen County in southeastern Wyoming...
Northwestern Laramie County in southeastern Wyoming...
Southeastern Platte County in southeastern Wyoming...
* Until 330 PM MDT.
* At 242 PM MDT, a severe thunderstorm capable of producing a tornado
was located 10 miles north of Whitaker, or 28 miles north of
Cheyenne, moving east at 35 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
southwestern Goshen...northwestern Laramie and southeastern Platte
Counties.
This includes Interstate 25 in Wyoming between mile markers 33 and
51.
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 4147 10502 4171 10495 4170 10439 4140 10449
TIME...MOT...LOC 2042Z 277DEG 29KT 4155 10491
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Cox3 follow-up statements
778
WWUS55 KCYS 192059
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
259 PM MDT TUE JUN 19 2018
WYC031-192107-
/O.CAN.KCYS.TO.W.0018.000000T0000Z-180619T2130Z/
Platte WY-
259 PM MDT TUE JUN 19 2018
...THE TORNADO WARNING FOR SOUTHEASTERN PLATTE COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has weakened
over the warned area. Therefore, the warning has been cancelled.
LAT...LON 4146 10497 4165 10490 4165 10441 4140 10449
TIME...MOT...LOC 2057Z 277DEG 29KT 4154 10480
$$
WYC015-021-192130-
/O.CON.KCYS.TO.W.0018.000000T0000Z-180619T2130Z/
Goshen WY-Laramie WY-
259 PM MDT TUE JUN 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM MDT FOR
SOUTHWESTERN GOSHEN AND NORTH CENTRAL LARAMIE COUNTIES...
At 257 PM MDT, a confirmed tornado was located 9 miles northeast of
Whitaker, or 27 miles north of Cheyenne, moving east at 35 mph.
HAZARD...Damaging tornado and quarter size hail.
SOURCE...Public confirmed tornado near mile marker 40.
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
southwestern Goshen and north central Laramie Counties.
This includes Interstate 25 in Wyoming between mile markers 33 and
46.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. 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 4146 10497 4165 10490 4165 10441 4140 10449
TIME...MOT...LOC 2057Z 277DEG 29KT 4154 10480
TORNADO...OBSERVED
HAIL...1.00IN
$$
Cox812
WWUS55 KCYS 192111
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
311 PM MDT TUE JUN 19 2018
WYC015-021-192130-
/O.CON.KCYS.TO.W.0018.000000T0000Z-180619T2130Z/
Goshen WY-Laramie WY-
311 PM MDT TUE JUN 19 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM MDT FOR
SOUTHWESTERN GOSHEN AND NORTH CENTRAL LARAMIE COUNTIES...
At 309 PM MDT, a severe thunderstorm capable of producing a tornado
was located 13 miles northeast of Whitaker, or 27 miles north of
Cheyenne, moving east at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
southwestern Goshen and north central Laramie Counties. The rotation
on this storm has weakened, but could spin up quickly.
This includes Interstate 25 in Wyoming between mile markers 33 and
37. This warning does not include the city of Cheyenne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4146 10493 4165 10482 4165 10441 4140 10449
TIME...MOT...LOC 2109Z 277DEG 29KT 4153 10467
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
Cox484
WWUS55 KCYS 192124
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
324 PM MDT TUE JUN 19 2018
WYC015-021-192132-
/O.EXP.KCYS.TO.W.0018.000000T0000Z-180619T2130Z/
Goshen WY-Laramie WY-
324 PM MDT TUE JUN 19 2018
...THE TORNADO WARNING FOR SOUTHWESTERN GOSHEN AND NORTH CENTRAL
LARAMIE COUNTIES WILL EXPIRE AT 330 PM MDT...
The tornado threat has diminished and the Tornado Warning has been
allowed to expire. However, large hail and damaging winds remain
likely and a Severe Thunderstorm Warning remains in effect for the
area. However small hail, gusty winds and heavy rain are still
possible with this thunderstorm.
Remember, a Severe Thunderstorm Warning still remains in effect for
northern Larmie county.
LAT...LON 4146 10493 4165 10482 4165 10441 4140 10449
TIME...MOT...LOC 2122Z 277DEG 29KT 4152 10456
$$
CoxThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 6:33 PM MDT | Special Weather Statement | CYS | Goshen | 42 min |
| Jun 18, 6:44 PM MDT | Special Weather Statement | CYS | Converse | 46 min |
| Jun 18, 6:48 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 42 min |
| Jun 18, 7:30 PM MDT | Special Weather Statement | CYS | Laramie | 45 min |
| Jun 19, 4:20 AM MDT | Special Weather Statement | CYS | Niobrara | 40 min |
| Jun 19, 5:22 AM MDT | Special Weather Statement | CYS | 38 min | |
| Jun 19, 7:17 AM MDT | Special Weather Statement | CYS | 43 min | |
| Jun 19, 7:40 AM MDT | Special Weather Statement | CYS | Niobrara | 35 min |
| Jun 19, 7:44 AM MDT | Special Weather Statement | CYS | Converse | 46 min |
| Jun 19, 8:14 AM MDT | Special Weather Statement | CYS | Niobrara | 46 min |
| Jun 19, 8:27 AM MDT | Special Weather Statement | CYS | Converse | 48 min |
| Jun 19, 9:17 AM MDT | Special Weather Statement | CYS | Niobrara | 43 min |
| Jun 19, 11:42 AM MDT | Special Weather Statement | CYS | 48 min | |
| Jun 19, 12:00 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 45 min |
| Jun 19, 12:52 PM MDT | Special Weather Statement | CYS | Albany | 53 min |
| Jun 19, 12:58 PM MDT | Special Weather Statement | CYS | 47 min | |
| Jun 19, 1:03 PM MDT | Special Weather Statement | CYS | Laramie | 42 min |
| Jun 19, 1:10 PM MDT | Special Weather Statement | CYS | Platte | 50 min |
| Jun 19, 1:24 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 34 min |
| Jun 19, 1:38 PM MDT | Tornado Warning | CYS | Albany | 37 min |
| Jun 19, 2:01 PM MDT | Tornado Warning | CYS | Albany, Laramie, Platte | 44 min |
| Jun 19, 2:30 PM MDT | Tornado Warning | CYS | Platte | 17 min |
| Jun 19, 3:20 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
| Jun 19, 3:29 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 61 min |
| Jun 19, 3:41 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 49 min |
| Jun 19, 4:07 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 38 min |
| Jun 19, 4:38 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 52 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.