Alert archive / Nebraska / Tornado Warnings in 2011
Tornado Warning 21, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jul 2, 2011, 7:54 PM MDT for Banner County, Scotts Bluff County, Nebraska; Goshen County, Wyoming. It was in force for 40 min. 5 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
- Jul 2, 2011, 7:54 PM MDT (01:54 UTC)
- Expired
- Jul 2, 2011, 8:34 PM MDT
- In force
- 40 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Banner County, NE, Scotts Bluff County, NE, Goshen County, WY
The radar
The Cheyenne radar (KCYS), 99 km from the middle of the area, began a volume at 01:55 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, 7:59 PM MDT | HAIL 1.75 | Lyman, NE | |
| Jul 2, 8:00 PM MDT | HAIL 1 | 7 E Lyman, NE | NO ROTATION. |
| Jul 2, 8:11 PM MDT | HAIL 1.25 | 10 Sw Lyman, WY | |
| Jul 2, 8:16 PM MDT | HAIL 1 | Lyman, NE | |
| Jul 2, 8:35 PM MDT | HAIL 1 | 17 S Lyman, NE |
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
Denver, CO (KDNR), launched 00:00Z, 1.9 hours before the alert went out and 229 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
- 920 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 2294 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.0
The text
As transmitted, in the capitals the NWS used until 2016.
424
WFUS55 KCYS 030154
TORCYS
NEC007-157-WYC015-030245-
/O.NEW.KCYS.TO.W.0021.110703T0154Z-110703T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
754 PM MDT SAT JUL 2 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
WESTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA...
SOUTHEASTERN GOSHEN COUNTY IN SOUTHEAST WYOMING...
* UNTIL 845 PM MDT
* AT 750 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD
3 MILES WEST OF LYMAN...OR 13 MILES SOUTH OF TORRINGTON. A TORNADO
MAY DEVELOP AT ANY TIME. DOPPLER RADAR SHOWED THIS DANGEROUS STORM
MOVING SOUTHEAST AT 25 MPH.
* LOCATIONS IMPACTED INCLUDE...
STEGALL.
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 4184 10426 4200 10403 4200 10400 4177 10363
4156 10410
TIME...MOT...LOC 0153Z 334DEG 22KT 4187 10410
$$
MAZUR2 follow-up statements
950 WWUS55 KCYS 030215 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 815 PM MDT SAT JUL 2 2011 NEC007-157-WYC015-030245- /O.CON.KCYS.TO.W.0021.000000T0000Z-110703T0245Z/ BANNER NE-SCOTTS BLUFF NE-GOSHEN WY- 815 PM MDT SAT JUL 2 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN GOSHEN... SOUTHWESTERN SCOTTS BLUFF AND NORTHWESTERN BANNER COUNTIES UNTIL 845 PM MDT... AT 813 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 8 MILES SOUTHWEST OF STEGALL...OR 20 MILES WEST OF SCOTTSBLUFF...MOVING SOUTHEAST AT 25 MPH. IN ADDITION...HAIL TO THE SIZE OF HALF DOLLARS IS POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF NORTHWESTERN BANNER AND SOUTHWESTERN SCOTTS BLUFF COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4178 10417 4195 10399 4177 10363 4158 10405 TIME...MOT...LOC 0215Z 330DEG 21KT 4176 10401 $$ MAZUR
748 WWUS55 KCYS 030234 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 834 PM MDT SAT JUL 2 2011 NEC007-157-WYC015-030242- /O.CAN.KCYS.TO.W.0021.000000T0000Z-110703T0245Z/ BANNER NE-SCOTTS BLUFF NE-GOSHEN WY- 834 PM MDT SAT JUL 2 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN GOSHEN...SOUTHWESTERN SCOTTS BLUFF AND NORTHWESTERN BANNER COUNTIES IS CANCELLED... HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE IN THIS AREA. IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM. REMEMBER...A TORNADO WARNING REMAINS IN EFFECT FOR EXTREME SOUTHWESTERN SCOTTS BLUFF AND WESTERN BANNER COUNTY UNTIL 915 PM. LAT...LON 4178 10417 4195 10399 4177 10363 4158 10405 TIME...MOT...LOC 0232Z 330DEG 21KT 4167 10394 $$ MAZUR
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:44 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 61 min |
| Jul 2, 6:56 PM MDT | Tornado Warning | CYS | Sioux | 49 min |
| Jul 2, 7:23 PM MDT | Tornado Warning | CYS | Banner, Scotts Bluff, Sioux | 37 min |
| Jul 2, 7:41 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 49 min |
| Jul 2, 8:25 PM MDT | Flash Flood Warning | CYS | Banner, Scotts Bluff | 6 hr |
| Jul 2, 8:30 PM MDT | Tornado Warning | CYS | Banner, Kimball, Scotts Bluff | 45 min |
| Jul 2, 9:11 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball, Morrill, Scotts Bluff | 49 min |
| Jul 3, 1:55 AM MDT | Areal Flood Warning | CYS | Banner, Scotts Bluff | 7 hr |
| Jul 2, 6:04 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 41 min |
| Jul 2, 6:22 PM MDT | Tornado Warning | CYS | Goshen | 37 min |
Nearby
Tornado Warnings in Nebraska, 2011Tornado 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.