Alert archive / Wyoming / Tornado Warnings in 2011
Tornado Warning 34, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Aug 10, 2011, 3:38 PM MDT for Laramie County, Wyoming; Kimball County, Nebraska. It was in force for 37 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
- Aug 10, 2011, 3:38 PM MDT (21:38 UTC)
- Expired
- Aug 10, 2011, 4:15 PM MDT
- In force
- 37 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Kimball County, NE, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 69 km from the middle of the area, began a volume at 21:41 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 |
|---|---|---|---|
| Aug 10, 3:43 PM MDT | HAIL 0.5 | Pine Bluffs, WY | |
| Aug 10, 3:50 PM MDT | HAIL 1.25 | Pine Bluffs, WY | HAIL RANGED IN SIZE FROM 1 INCH TO 1.25 INCHES. |
| Aug 10, 3:55 PM MDT | HAIL 1.75 | Pine Bluffs, WY | ALSO HEAVY RAIN WITH SOME MINOR FLOODING. |
| Aug 10, 4:00 PM MDT | TORNADO | 2 Se Bushnell, NE | ON THE GROUND BETWEEN COUNTY ROAD 20 AND 30. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.6 hours before the alert went out and 157 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
- 463 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 728 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
881
WFUS55 KCYS 102138
TORCYS
NEC105-WYC021-102215-
/O.NEW.KCYS.TO.W.0034.110810T2138Z-110810T2215Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
338 PM MDT WED AUG 10 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHWESTERN KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA...
EAST CENTRAL LARAMIE COUNTY IN SOUTHEAST WYOMING...
* UNTIL 415 PM MDT
* AT 332 PM MDT...THE PUBLIC REPORTED A TORNADO 5 MILES WEST OF PINE
BLUFFS AT MILE MARKER 396...OR 23 MILES WEST OF KIMBALL. DOPPLER
RADAR SHOWED THIS TORNADO MOVING SOUTHEAST AT 20 MPH.
* THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL LARAMIE
AND SOUTHWESTERN KIMBALL COUNTIES.
THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 393 AND
402.
THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 1 AND
14.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A TORNADO IS ON THE GROUND. 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.
MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.
&&
LAT...LON 4117 10373 4101 10382 4105 10410 4124 10433
4133 10418
TIME...MOT...LOC 2137Z 298DEG 17KT 4118 10407
$$
RUBIN3 follow-up statements
583
WWUS55 KCYS 102154
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
354 PM MDT WED AUG 10 2011
NEC105-WYC021-102215-
/O.CON.KCYS.TO.W.0034.000000T0000Z-110810T2215Z/
KIMBALL NE-LARAMIE WY-
354 PM MDT WED AUG 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL LARAMIE AND
SOUTHWESTERN KIMBALL COUNTIES UNTIL 415 PM MDT...
AT 351 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR PINE BLUFFS...OR 20 MILES WEST OF KIMBALL...
MOVING SOUTHEAST AT 20 MPH.
THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
LARAMIE AND SOUTHWESTERN KIMBALL COUNTIES.
THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 397 AND
402.
THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 1 AND
13.
AT 336 PM MDT...THE PUBLIC REPORTED A TORNADO AT A LOCATION 4 MILES
WEST OF PINE BLUFFS AT MILE MARKER 396 ON INTERSTATE 80.
AT 350 PM MDT...HAIL OF 1.25 INCHES IN DIAMETER WAS REPORTED IN PINE
BLUFFS IN EASTERN LARAMIE COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN CHEYENNE.
&&
LAT...LON 4104 10399 4117 10419 4129 10407 4117 10373
4101 10382
TIME...MOT...LOC 2153Z 298DEG 17KT 4115 10401
$$
RUBIN822
WWUS55 KCYS 102205
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
405 PM MDT WED AUG 10 2011
NEC105-WYC021-102215-
/O.CON.KCYS.TO.W.0034.000000T0000Z-110810T2215Z/
KIMBALL NE-LARAMIE WY-
405 PM MDT WED AUG 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR EXTREME SOUTHEASTERN
LARAMIE AND SOUTHWESTERN KIMBALL COUNTIES UNTIL 415 PM MDT...
AT 404 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 7 MILES SOUTHEAST OF PINE BLUFFS...OR 17 MILES
SOUTHWEST OF KIMBALL...MOVING SOUTHEAST AT 20 MPH.
THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF EXTREME
SOUTHEASTERN LARAMIE AND SOUTHWESTERN KIMBALL COUNTIES.
THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 1 AND
13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN CHEYENNE.
&&
LAT...LON 4104 10399 4112 10412 4127 10401 4117 10373
4101 10382
TIME...MOT...LOC 2205Z 297DEG 17KT 4111 10395
$$
RUBIN370
WWUS55 KCYS 102214
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
414 PM MDT WED AUG 10 2011
NEC105-WYC021-102222-
/O.EXP.KCYS.TO.W.0034.000000T0000Z-110810T2215Z/
KIMBALL NE-LARAMIE WY-
414 PM MDT WED AUG 10 2011
...THE TORNADO WARNING FOR SOUTHWESTERN KIMBALL COUNTY AND EAST
CENTRAL LARAMIE COUNTY HAS BEEN CANCELLED...
A TORNADO WARNING IS IN EFFECT FOR SOUTHERN KIMBALL COUNTY UNTIL 500
PM MDT.
THE TORNADO WARNING ISSUED AT 338 PM MDT FOR SOUTHWESTERN KIMBALL
COUNTY AND EAST CENTRAL LARAMIE COUNTY HAS BEEN CANCELLED.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT.
LAT...LON 4104 10399 4112 10412 4127 10401 4117 10373
4101 10382
TIME...MOT...LOC 2212Z 297DEG 17KT 4109 10391
$$
RUBINThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:11 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 49 min |
| Aug 9, 6:54 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie, Platte | 66 min |
| Aug 9, 7:18 PM MDT | Tornado Warning | CYS | Goshen, Laramie | 42 min |
| Aug 9, 7:54 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 66 min |
| Aug 9, 8:57 PM MDT | Special Weather Statement | CYS | Goshen | 48 min |
| Aug 9, 8:59 PM MDT | Special Weather Statement | CYS | Goshen | 46 min |
| Aug 9, 9:11 PM MDT | Special Weather Statement | CYS | Laramie | 64 min |
| Aug 9, 9:31 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 59 min |
| Aug 10, 1:25 AM MDT | Dense Fog Advisory | CYS | Albany, Laramie | 5 hr |
| Aug 10, 2:16 PM MDT | Fire Weather Watch | CYS | 13 hr | |
| Aug 10, 3:19 PM MDT | Special Weather Statement | CYS | Laramie | 56 min |
| Aug 10, 3:31 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| Aug 10, 4:33 PM MDT | Special Weather Statement | CYS | Laramie | 57 min |
| Aug 10, 5:46 PM MDT | Special Weather Statement | CYS | Laramie | 59 min |
| Aug 9, 8:46 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball, Morrill | 59 min |
| Aug 9, 9:38 PM MDT | Special Weather Statement | CYS | Box Butte | 67 min |
| Aug 9, 9:42 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 30 min |
| Aug 9, 10:40 PM MDT | Special Weather Statement | CYS | Kimball | 50 min |
| Aug 10, 2:45 AM MDT | Special Weather Statement | CYS | Morrill | 60 min |
| Aug 10, 1:39 PM MDT | Special Weather Statement | CYS | Sioux | 66 min |
| Aug 10, 2:18 PM MDT | Special Weather Statement | CYS | Kimball | 57 min |
| Aug 10, 2:23 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sioux | 67 min |
| Aug 10, 3:23 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Sioux | 67 min |
| Aug 10, 4:00 PM MDT | Special Weather Statement | CYS | Banner | 60 min |
| Aug 10, 4:11 PM MDT | Tornado Warning | CYS | Kimball | 49 min |
| Aug 10, 4:24 PM MDT | Special Weather Statement | CYS | Box Butte, Morrill | 66 min |
| Aug 10, 4:50 PM MDT | Special Weather Statement | CYS | Morrill | 25 min |
| Aug 10, 4:52 PM MDT | Special Weather Statement | CYS | Banner | 68 min |
| Aug 10, 5:23 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 53 min |
| Aug 10, 5:26 PM MDT | Special Weather Statement | CYS | Kimball | 64 min |
Nearby
Tornado Warnings in Wyoming, 2011Tornado Warnings in Nebraska, 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.