Alert archive / Wyoming / Tornado Warnings in 2011
Tornado Warning 18, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jul 2, 2011, 6:22 PM MDT for Goshen County, Wyoming. It was in force for 37 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
- Jul 2, 2011, 6:22 PM MDT (00:22 UTC)
- Expired
- Jul 2, 2011, 6:59 PM MDT
- In force
- 37 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
County Goshen County, WY
The radar
The Cheyenne radar (KCYS), 136 km from the middle of the area, began a volume at 00:23 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 |
|---|---|---|---|
| Jul 2, 6:47 PM MDT | TORNADO | 7 Ne Fort Laramie, WY |
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 |
|---|---|---|---|
| Jul 2, 2:13 PM MDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 0.4 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
- 1797 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1368 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.8
The text
As transmitted, in the capitals the NWS used until 2016.
920 WFUS55 KCYS 030022 TORCYS WYC015-030115- /O.NEW.KCYS.TO.W.0018.110703T0022Z-110703T0115Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 622 PM MDT SAT JUL 2 2011 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * TORNADO WARNING FOR... NORTHERN GOSHEN COUNTY IN SOUTHEAST WYOMING... * UNTIL 715 PM MDT * AT 619 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 10 MILES SOUTHWEST OF JAY EM...OR 25 MILES SOUTH OF LUSK...AND MOVING SOUTHEAST AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... HWY 85 AT DRY RAWHIDE CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4233 10412 4213 10433 4238 10464 4246 10456 TIME...MOT...LOC 0023Z 303DEG 17KT 4239 10451 $$ MAZUR
2 follow-up statements
207 WWUS55 KCYS 030036 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 636 PM MDT SAT JUL 2 2011 WYC015-030115- /O.CON.KCYS.TO.W.0018.000000T0000Z-110703T0115Z/ GOSHEN WY- 636 PM MDT SAT JUL 2 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN GOSHEN COUNTY UNTIL 715 PM MDT... AT 632 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. A TORNADO MAY DEVELOP AT ANY TIME. THIS DANGEROUS STORM WAS LOCATED 6 MILES NORTH OF FORT LARAMIE...OR 22 MILES NORTHWEST OF TORRINGTON... MOVING SOUTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... HWY 85 AT DRY RAWHIDE CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4237 10449 4228 10418 4213 10433 4231 10455 TIME...MOT...LOC 0036Z 314DEG 26KT 4228 10446 $$ MAZUR
567 WWUS55 KCYS 030059 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 659 PM MDT SAT JUL 2 2011 WYC015-030108- /O.CAN.KCYS.TO.W.0018.000000T0000Z-110703T0115Z/ GOSHEN WY- 659 PM MDT SAT JUL 2 2011 ...THE TORNADO WARNING FOR NORTHERN GOSHEN COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED INTO EAST CENTRAL GOSHEN COUNTY. REMEMBER...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL GOSHEN COUNTY UNTIL 745 PM. LAT...LON 4237 10449 4228 10418 4213 10433 4231 10455 TIME...MOT...LOC 0058Z 314DEG 26KT 4217 10431 $$ MAZUR
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:04 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 41 min |
| Jul 2, 6:44 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 61 min |
| Jul 2, 6:56 PM MDT | Tornado Warning | CYS | Goshen | 49 min |
| Jul 2, 7:23 PM MDT | Tornado Warning | CYS | Goshen | 37 min |
| Jul 2, 7:54 PM MDT | Tornado Warning | CYS | Goshen | 40 min |
| Jul 2, 8:25 PM MDT | Flash Flood Warning | CYS | Goshen | 6 hr |
| Jul 2, 8:30 PM MDT | Tornado Warning | CYS | Goshen | 45 min |
| Jul 3, 1:55 AM MDT | Areal Flood Warning | CYS | Goshen | 7 hr |
Nearby
Tornado Warnings in Wyoming, 2011Every tornado warning in 2011Tornadoes in 2011
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.