Alert archive / Nebraska / Tornado Warnings in 2011
Tornado Warning 9, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 18, 2011, 1:57 PM MDT for Scotts Bluff County, Sioux County, Nebraska. It was in force for 17 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
- Jun 18, 2011, 1:57 PM MDT (19:57 UTC)
- Expired
- Jun 18, 2011, 2:14 PM MDT
- In force
- 17 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Scotts Bluff County, NE, Sioux County, NE
The radar
The Cheyenne radar (KCYS), 124 km from the middle of the area, began a volume at 19:57 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 18, 2:00 PM MDT | TORNADO | 3 W Mitchell, NE | TORNADO ON THE GROUND 3 MILES WEST OF MITCHELL MOVING NORTHEAST. |
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 |
|---|---|---|---|
| Jun 18, 12:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.0 hours before the alert went out and 231 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
- 110 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 1171 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
653 WFUS55 KCYS 181957 TORCYS NEC157-165-182045- /O.NEW.KCYS.TO.W.0009.110618T1957Z-110618T2045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 157 PM MDT SAT JUN 18 2011 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * TORNADO WARNING FOR... SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA... SOUTH CENTRAL SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA... * UNTIL 245 PM MDT * AT 153 PM MDT...LOCAL LAW ENFORCEMENT REPORTED A FUNNEL CLOUD NEAR STEGALL...OR 14 MILES WEST OF SCOTTSBLUFF. DOPPLER RADAR SHOWED THIS STORM MOVING NORTHEAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... SCOTTSBLUFF...MORRILL...MITCHELL...SCOTTS BLUFF NATIONAL MONUMENT...GERING...TERRYTOWN...SCOTTSBLUFF AIRPORT...LAKE ALICE AND LAKE MINATARE. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT FOR THE SAME 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 4184 10343 4172 10400 4196 10404 4221 10370 TIME...MOT...LOC 1957Z 241DEG 25KT 4190 10390 $$ CLAYCOMB
2 follow-up statements
438 WWUS55 KCYS 182002 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 202 PM MDT SAT JUN 18 2011 NEC157-165-182045- /O.CON.KCYS.TO.W.0009.000000T0000Z-110618T2045Z/ SCOTTS BLUFF NE-SIOUX NE- 202 PM MDT SAT JUN 18 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL SIOUX AND SCOTTS BLUFF COUNTIES UNTIL 245 PM MDT... AT 200 PM MDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO. THIS TORNADO WAS LOCATED 3 MILES WEST OF MITCHELL...OR 12 MILES WEST OF SCOTTSBLUFF...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... SCOTTSBLUFF...MITCHELL...SCOTTS BLUFF NATIONAL MONUMENT...GERING... TERRYTOWN...SCOTTSBLUFF AIRPORT AND LAKE ALICE. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE. && LAT...LON 4176 10390 4196 10404 4221 10370 4184 10343 TIME...MOT...LOC 2001Z 241DEG 25KT 4191 10387 $$ CLAYCOMB
243 WWUS55 KCYS 182014 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 214 PM MDT SAT JUN 18 2011 NEC157-165-182024- /O.CAN.KCYS.TO.W.0009.000000T0000Z-110618T2045Z/ SCOTTS BLUFF NE-SIOUX NE- 214 PM MDT SAT JUN 18 2011 ...THE TORNADO WARNING FOR SOUTH CENTRAL SIOUX AND SCOTTS BLUFF COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED AREA. EXPECT VERY HEAVY RAINFALL WITH THIS SORM AS IT CONTINUES TO WEAKEN AND COLLAPSE. TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE. LAT...LON 4176 10390 4196 10404 4221 10370 4184 10343 TIME...MOT...LOC 2014Z 241DEG 25KT 4196 10376 $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 1:51 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 26 min |
| Jun 18, 2:21 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 19 min |
Nearby
Tornado 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.