Alert archive / Wyoming / Tornado Warnings in 2018
Tornado Warning 6, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at May 27, 2018, 3:42 PM MDT for Laramie County, Wyoming. It was in force for 48 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
- May 27, 2018, 3:42 PM MDT (21:42 UTC)
- Expired
- May 27, 2018, 4:30 PM MDT
- In force
- 48 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 2.0 in
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 29 km from the middle of the area, began a volume at 21:44 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 |
|---|---|---|---|
| May 27, 4:21 PM MDT | TORNADO | 19 Nnw Cheyenne, WY | A VEHICLE WAS DAMAGED NEAR THE WHITAKER EXIT ALONG INTERSTATE 25 WITH INDICATION OF TORNADIC ROTATION. WITHOUT A DAMAGE INDICATOR, THIS PORTION OF THE TORNADO WAS RATED EF-UNKNOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 27, 12:05 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.7 hours before the alert went out and 224 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
- 4365 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
566
WFUS55 KCYS 272142
TORCYS
WYC021-272230-
/O.NEW.KCYS.TO.W.0006.180527T2142Z-180527T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
342 PM MDT SUN MAY 27 2018
The National Weather Service in Cheyenne has issued a
* Tornado Warning for...
West central Laramie County in southeastern Wyoming...
* Until 430 PM MDT
* At 342 PM MDT, a confirmed tornado was located over Horse Creek,
or 19 miles northwest of Cheyenne, moving northeast at 15 mph.
HAZARD...Damaging tornado and hail up to two inches in diameter.
SOURCE...Law enforcement confirmed tornado.
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.
* The tornado will be near...
Whitaker around 430 PM MDT.
This includes Interstate 25 in Wyoming between mile markers 25 and
30.
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.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Cheyenne.
&&
LAT...LON 4120 10512 4128 10523 4153 10512 4138 10477
TIME...MOT...LOC 2142Z 217DEG 11KT 4129 10510
TORNADO...OBSERVED
HAIL...2.00IN
$$
Claycomb3 follow-up statements
094
WWUS55 KCYS 272150
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
350 PM MDT SUN MAY 27 2018
WYC021-272230-
/O.CON.KCYS.TO.W.0006.000000T0000Z-180527T2230Z/
Laramie WY-
350 PM MDT SUN MAY 27 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR WEST
CENTRAL LARAMIE COUNTY...
At 348 PM MDT, a confirmed tornado was located over Federal, or 18
miles northwest of Cheyenne, moving northeast at 10 mph.
HAZARD...Damaging tornado and two inch hail.
SOURCE...Law enforcement confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near... Whitaker around 430 PM MDT. Interstate
25 between mile markers 25 and 30 will also be impacted by this
storm around 415 PM.
This includes Interstate 25 in Wyoming between mile markers 25 and
30.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.
&&
LAT...LON 4121 10512 4126 10520 4150 10506 4138 10477
TIME...MOT...LOC 2148Z 221DEG 9KT 4129 10509
TORNADO...OBSERVED
HAIL...2.00IN
$$
Claycomb450
WWUS55 KCYS 272209
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
409 PM MDT SUN MAY 27 2018
WYC021-272230-
/O.CON.KCYS.TO.W.0006.000000T0000Z-180527T2230Z/
Laramie WY-
409 PM MDT SUN MAY 27 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR WEST
CENTRAL LARAMIE COUNTY...
At 409 PM MDT, a confirmed tornado was located near Whitaker, or 18
miles northwest of Cheyenne, moving northeast at 20 mph.
HAZARD...Damaging tornado and two inch hail.
SOURCE...Law enforcement confirmed tornado.
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 tornado will be near...
Whitaker around 420 PM MDT.
This includes Interstate 25 in Wyoming between mile markers 25 and
30.
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.
If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.
&&
LAT...LON 4128 10500 4132 10512 4150 10506 4138 10477
TIME...MOT...LOC 2209Z 215DEG 32KT 4137 10497
TORNADO...OBSERVED
HAIL...2.00IN
$$
Claycomb528
WWUS55 KCYS 272225
SVSCYS
Severe Weather Statement
National Weather Service Cheyenne WY
425 PM MDT SUN MAY 27 2018
WYC021-272230-
/O.CON.KCYS.TO.W.0006.000000T0000Z-180527T2230Z/
Laramie WY-
425 PM MDT SUN MAY 27 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR WEST
CENTRAL LARAMIE COUNTY...
At 424 PM MDT, a confirmed tornado was located near Whitaker, or 19
miles north of Cheyenne, moving northeast at 15 mph. A new Tornado
Warning has been issued through 5PM this afternoon.
HAZARD...Damaging tornado and two inch hail.
SOURCE...Law enforcement confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
west central Laramie County.
This includes Interstate 25 in Wyoming between mile markers 25 and
30.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.
&&
LAT...LON 4128 10500 4132 10512 4150 10506 4138 10477
TIME...MOT...LOC 2224Z 217DEG 11KT 4141 10493
TORNADO...OBSERVED
HAIL...2.00IN
$$
ClaycombThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 6:48 PM MDT | Special Weather Statement | CYS | 42 min | |
| May 26, 7:37 PM MDT | Special Weather Statement | CYS | Carbon | 38 min |
| May 26, 9:05 PM MDT | Special Weather Statement | CYS | Converse | 40 min |
| May 27, 2:58 AM MDT | Flash Flood Watch | CYS | Albany, Converse, Goshen, Laramie, Niobrara, Platte | 21 hr |
| May 27, 12:59 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 23 min |
| May 27, 2:15 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 31 min |
| May 27, 2:43 PM MDT | Tornado Warning | CYS | Albany, Laramie | 32 min |
| May 27, 2:56 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 30 min |
| May 27, 3:08 PM MDT | Tornado Warning | CYS | Albany, Laramie | 8 min |
| May 27, 3:18 PM MDT | Special Weather Statement | CYS | 42 min | |
| May 27, 3:21 PM MDT | Tornado Warning | CYS | Laramie | 24 min |
| May 27, 3:28 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 47 min |
| May 27, 3:33 PM MDT | Special Weather Statement | CYS | Albany | 42 min |
| May 27, 3:41 PM MDT | Special Weather Statement | CYS | 49 min | |
| May 27, 3:48 PM MDT | Areal Flood Advisory | CYS | Albany, Laramie | 3 hr |
| May 27, 4:05 PM MDT | Tornado Warning | CYS | Albany, Converse, Platte | 40 min |
| May 27, 4:08 PM MDT | Special Weather Statement | CYS | Laramie | 52 min |
| May 27, 4:15 PM MDT | Tornado Warning | CYS | Goshen, Laramie, Platte | 45 min |
| May 27, 4:17 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 43 min |
| May 27, 4:29 PM MDT | Tornado Warning | CYS | Albany, Converse, Platte | 20 min |
| May 27, 4:32 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 29 min |
| May 27, 4:42 PM MDT | Areal Flood Advisory | CYS | Albany, Converse, Platte | 3 hr |
| May 27, 4:47 PM MDT | Flash Flood Warning | CYS | Albany, Laramie | 3 hr |
| May 27, 5:00 PM MDT | Tornado Warning | CYS | Laramie | 19 min |
| May 27, 5:12 PM MDT | Special Weather Statement | CYS | Converse | 48 min |
| May 27, 5:13 PM MDT | Special Weather Statement | CYS | Platte | 47 min |
| May 27, 5:42 PM MDT | Special Weather Statement | CYS | Platte | 48 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.