Alert archive / Wyoming / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 21, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 12, 2016, 1:38 PM MDT for Laramie County, Wyoming. It was in force for 52 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
- Jun 12, 2016, 1:38 PM MDT (19:38 UTC)
- Expired
- Jun 12, 2016, 2:30 PM MDT
- In force
- 52 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 6 km from the middle of the area, began a volume at 19:40 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 12, 1:47 PM MDT | HAIL 1.25 | 3 S Cheyenne, WY | |
| Jun 12, 1:47 PM MDT | HAIL 1.25 | 5 S Cheyenne, WY | |
| Jun 12, 1:55 PM MDT | HAIL 0.88 | 1 S Cheyenne, WY | HAIL SIZE REPORTED TO BE LARGER THAN NICKELS AND JUST UNDER THE SIZE OF QUARTERS. |
| Jun 12, 1:55 PM MDT | HAIL 1.5 | 2 S Cheyenne, WY |
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, 7.6 hours before the alert went out and 189 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
- 11 J/kg
- Mixed-layer CIN
- -304 J/kg
- Mixed-layer LCL
- 2145 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -72 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
721
WUUS55 KCYS 121938
SVRCYS
WYC021-122030-
/O.NEW.KCYS.SV.W.0021.160612T1938Z-160612T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
138 PM MDT SUN JUN 12 2016
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL LARAMIE COUNTY IN SOUTHEASTERN WYOMING...
* UNTIL 230 PM MDT
* AT 137 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED OVER SOUTH
GREELEY...OR NEAR CHEYENNE...MOVING NORTHEAST AT 20 MPH.
HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE
TO ROOFS...SIDING...AND TREES.
* LOCATIONS IMPACTED INCLUDE...
CHEYENNE...RANCHETTES...NORTH CHEYENNE...FRONTIER PARK...WARREN AF
BASE...SOUTH GREELEY...WARREN AFB...FOX FARM-COLLEGE AND SOUTH GREELEY
HIGH.
THIS INCLUDES THE FOLLOWING HIGHWAYS...
INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 4 AND 18.
INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 354 AND 376.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
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 4100 10482 4113 10499 4137 10468 4107 10447
TIME...MOT...LOC 1937Z 233DEG 19KT 4110 10485
HAIL...1.00IN
WIND...60MPH
$$
CLAYCOMB3 follow-up statements
607 WWUS55 KCYS 121953 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 153 PM MDT SUN JUN 12 2016 WYC021-122030- /O.CON.KCYS.SV.W.0021.000000T0000Z-160612T2030Z/ LARAMIE WY- 153 PM MDT SUN JUN 12 2016 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM MDT FOR SOUTH CENTRAL LARAMIE COUNTY... AT 152 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED OVER CHEYENNE... MOVING NORTHEAST AT 20 MPH. HAZARD...QUARTER SIZE HAIL AND 50 MPH DOWNBURST WINDS. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. LOCATIONS IMPACTED INCLUDE... CHEYENNE...RANCHETTES...NORTH CHEYENNE...FRONTIER PARK...WARREN AF BASE... SOUTH GREELEY...WARREN AFB...FOX FARM-COLLEGE AND SOUTH GREELEY HIGH. THIS INCLUDES THE FOLLOWING HIGHWAYS... INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 7 AND 15. INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 357 AND 376. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN CHEYENNE. && LAT...LON 4104 10479 4112 10492 4137 10468 4107 10447 TIME...MOT...LOC 1952Z 234DEG 17KT 4112 10479 HAIL...1.00IN WIND...<50MPH $$ CLAYCOMB
648
WWUS55 KCYS 122007
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
207 PM MDT SUN JUN 12 2016
WYC021-122030-
/O.CON.KCYS.SV.W.0021.000000T0000Z-160612T2030Z/
LARAMIE WY-
207 PM MDT SUN JUN 12 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM MDT
FOR SOUTH CENTRAL LARAMIE COUNTY...
AT 206 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CHEYENNE...
MOVING EAST AT 25 MPH.
HAZARD...PING PONG BALL SIZE HAIL.
SOURCE...PUBLIC. AT 155 PM...PING PONG BALL SIZED HAIL WAS REPORTED
IN SOUTHERN CHEYENNE SOUTH OF INTERSTATE 80.
IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT DAMAGE
TO ROOFS...SIDING...WINDOWS...AND VEHICLES.
LOCATIONS IMPACTED INCLUDE...
CHEYENNE...SOUTH GREELEY...WARREN AFB...RANCHETTES...SOUTH GREELEY HIGH
AND FOX FARM-COLLEGE.
THIS INCLUDES THE FOLLOWING HIGHWAYS...
INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 9 AND 10.
INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 360 AND 376.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 4106 10482 4113 10486 4127 10463 4107 10447
TIME...MOT...LOC 2006Z 265DEG 23KT 4111 10467
HAIL...1.50IN
WIND...<50MPH
$$
CLAYCOMB351
WWUS55 KCYS 122021
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
221 PM MDT SUN JUN 12 2016
WYC021-122031-
/O.EXP.KCYS.SV.W.0021.000000T0000Z-160612T2030Z/
LARAMIE WY-
221 PM MDT SUN JUN 12 2016
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LARAMIE COUNTY
WILL EXPIRE AT 230 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 4106 10482 4113 10486 4127 10463 4107 10447
TIME...MOT...LOC 2018Z 233DEG 19KT 4111 10467
$$
CLAYCOMBThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 7:26 PM MDT | Special Weather Statement | CYS | Niobrara | 64 min |
| Jun 12, 1:08 PM MDT | Special Weather Statement | CYS | Laramie | 52 min |
| Jun 12, 1:45 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 45 min |
| Jun 12, 2:17 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 43 min |
| Jun 12, 2:34 PM MDT | Special Weather Statement | CYS | Laramie | 41 min |
| Jun 12, 2:51 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 24 min |
| Jun 12, 3:11 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 49 min |
| Jun 12, 3:19 PM MDT | Tornado Warning | CYS | Albany, Converse, Platte | 26 min |
| Jun 12, 3:44 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 46 min |
| Jun 12, 3:46 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 13 min |
| Jun 12, 4:53 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara | 21 min |
| Jun 12, 5:38 PM MDT | Flash Flood Warning | CYS | Goshen | 3 hr |
| Jun 12, 5:40 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 35 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2016Every severe thunderstorm warning in 2016
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.