Alert archive / Wyoming / Tornado Warnings in 2018

Tornado Warning 4, NWS Cheyenne, WY

May 27, 2018Albany County, Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at May 27, 2018, 3:08 PM MDT for Albany County, Laramie County, Wyoming. It was in force for 8 min. 4 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: May 27, 2018, 3:08 PM MDT (21:08 UTC)
Expired: May 27, 2018, 3:16 PM MDT
In force: 8 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Observed
Hail: 2.0 in

Counties Albany County, WY, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 29 km from the middle of the area, began a volume at 21:11 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, 3:10 PM MDT	TORNADO	3 Nw Federal, WY	LARGE TORNADO REPORTED JUST NORTHWEST OF FEDERAL.
May 27, 3:11 PM MDT	TORNADO	3 Ne Federal, WY
May 27, 3:20 PM MDT	HAIL 1.75	1 N Federal, WY
May 27, 3:20 PM MDT	TORNADO	N Federal, WY	AN EF2 TORNADO TOUCHED DOWN A HALF MILE NORTH OF FEDERAL. SIGNIFICANT DAMAGE WAS OBSERVED NEAR FEDERAL WHERE EIGHT STRUCTURES WERE IMPACTED ALONG MOUNTAIN SHADOW DRIVE AND MOUNTAIN SHADOW LANE. THE TORNADO MOVED SLOWLY TO THE SOUTH FOR A MILE BEFORE IT LIFTED

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, 9.1 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted.

511 
WFUS55 KCYS 272108
TORCYS
WYC001-021-272200-
/O.NEW.KCYS.TO.W.0004.180527T2108Z-180527T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
308 PM MDT SUN MAY 27 2018

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  Eastern Albany County in southeastern Wyoming...
  Northwestern Laramie County in southeastern Wyoming...

* Until 400 PM MDT

* At 307 PM MDT, a confirmed tornado was located over Federal, or 19
  miles northwest of Cheyenne, moving northeast at 20 mph.

  HAZARD...Damaging tornado and hail up to two inches in diameter.

  SOURCE...Weather spotters 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 330 PM MDT.

This includes Interstate 25 in Wyoming between mile markers 20 and
39.
 
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 4116 10522 4124 10543 4163 10512 4139 10439
TIME...MOT...LOC 2107Z 237DEG 31KT 4131 10509 

TORNADO...OBSERVED
HAIL...2.00IN

$$

Claycomb

2 follow-up statements

069 
WWUS55 KCYS 272112
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
312 PM MDT SUN MAY 27 2018

WYC001-021-272200-
/O.CON.KCYS.TO.W.0004.000000T0000Z-180527T2200Z/
Albany WY-Laramie WY-
312 PM MDT SUN MAY 27 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR EASTERN
ALBANY AND NORTHWESTERN LARAMIE COUNTIES...
    
At 311 PM MDT, a confirmed tornado was located near Federal, or 18
miles northwest of Cheyenne, moving northeast at 35 mph.

HAZARD...Damaging tornado and two inch hail.

SOURCE...Weather spotters 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 330 PM MDT.

This includes Interstate 25 in Wyoming between mile markers 20 and
39.
 
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 4116 10522 4124 10543 4163 10512 4139 10439
TIME...MOT...LOC 2111Z 237DEG 31KT 4133 10504 

TORNADO...OBSERVED
HAIL...2.00IN

$$

Claycomb

235 
WWUS55 KCYS 272116
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
316 PM MDT SUN MAY 27 2018

WYC001-021-272124-
/O.CAN.KCYS.TO.W.0004.000000T0000Z-180527T2200Z/
Albany WY-Laramie WY-
316 PM MDT SUN MAY 27 2018

...THE TORNADO WARNING FOR EASTERN ALBANY AND NORTHWESTERN LARAMIE
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has been 
replaced with another Tornado Warning which runs through 4 PM 
this afternoon.

A severe thunderstorm watch remains in effect until 800 PM MDT for
southeastern Wyoming.

LAT...LON 4116 10522 4124 10543 4163 10512 4139 10439
TIME...MOT...LOC 2112Z 237DEG 31KT 4135 10501 

$$

Claycomb

The 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 Tornado observed	CYS	Albany, Laramie	32 min
May 27, 2:56 PM MDT	Severe Thunderstorm Warning	CYS	Albany	30 min
May 27, 3:18 PM MDT	Special Weather Statement	CYS		42 min
May 27, 3:21 PM MDT	Tornado Warning Tornado observed	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, 3:42 PM MDT	Tornado Warning Tornado observed	CYS	Laramie	48 min
May 27, 3:48 PM MDT	Areal Flood Advisory	CYS	Albany, Laramie	3 hr
May 27, 4:05 PM MDT	Tornado Warning Tornado observed	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, 2018 Every tornado warning in 2018 Tornadoes 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.