Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 171, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Sep 1, 2021, 10:30 PM MDT for Cherry County, Sheridan County, Nebraska. It was in force for 45 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
- Sep 1, 2021, 10:30 PM MDT (04:30 UTC)
- Expired
- Sep 1, 2021, 11:15 PM MDT
- In force
- 45 min
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Tornado
- Possible
- Damage threat
- Considerable
- Hail
- 0.88 in
- Wind
- 70.0 mph
Counties Cherry County, NE, Sheridan County, NE
The radar
The North Platte radar (KLNX), 124 km from the middle of the area, began a volume at 04:32 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 |
|---|---|---|---|
| Sep 1, 11:00 PM MDT | TSTM WND DMG | 24 Ssw Merriman, NE | THUNDERSTORM WIND GUSTS ESTIMATED AT 60 TO 70 MPH TORE TWO DOORS OFF OF AN OUTBUILDING. TWELVE INCH DIAMETER TREE LIMBS WERE ALSO REPORTED DOWN AT THIS LOCATION. |
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 |
|---|---|---|---|
| Sep 1, 5:26 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 4.5 hours before the alert went out and 183 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
- 549 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1203 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.7
The text
As transmitted.
842
WUUS53 KLBF 020430
SVRLBF
NEC031-161-020515-
/O.NEW.KLBF.SV.W.0171.210902T0430Z-210902T0515Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
1030 PM MDT Wed Sep 1 2021
The National Weather Service in North Platte has issued a
* Severe Thunderstorm Warning for...
Northwestern Cherry County in north central Nebraska...
East central Sheridan County in the Panhandle of Nebraska...
* Until 1115 PM MDT.
* At 1030 PM MDT, a severe thunderstorm was located 27 miles
southeast of Gordon, moving northeast at 40 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Cody, Merriman, Medicine Lake, Highway 61 crossing the Snake River,
Eli, Morgan Lake, Irwin, Intersection of Highway 20 and Irwin Road,
Shell Lake State Wildlife Management Area, Rock Hill, Bayonne,
Highway 61 Crossing The Niobrara River and Intersection of Highway
61 and Shadbolt Road.
This includes the following highways...
Highway 20 between mile markers 112 and 162.
Highway 61 between mile markers 187 and 230.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4234 10178 4248 10218 4299 10203 4299 10112
TIME...MOT...LOC 0430Z 202DEG 33KT 4248 10191
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
CDC1 follow-up statement
692
WWUS53 KLBF 020449
SVSLBF
Severe Weather Statement
National Weather Service North Platte NE
1049 PM MDT Wed Sep 1 2021
NEC161-020458-
/O.CAN.KLBF.SV.W.0171.000000T0000Z-210902T0515Z/
Sheridan NE-
1049 PM MDT Wed Sep 1 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SHERIDAN COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until midnight MDT for
north central Nebraska.
LAT...LON 4240 10171 4280 10208 4299 10203 4299 10112
TIME...MOT...LOC 0448Z 210DEG 33KT 4261 10173
$$
NEC031-020515-
/O.CON.KLBF.SV.W.0171.000000T0000Z-210902T0515Z/
Cherry NE-
1049 PM MDT Wed Sep 1 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT
FOR NORTHWESTERN CHERRY COUNTY...
At 1048 PM MDT, a severe thunderstorm was located 17 miles southwest
of Medicine Lake, or 27 miles southeast of Gordon, moving northeast
at 40 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Cody, Merriman, Medicine Lake, Highway 61 crossing the Snake River,
Eli, Highway 61 Crossing The Niobrara River, Irwin, Intersection of
Highway 61 and Shadbolt Road, Shell Lake and Bayonne.
This includes the following highways...
Highway 20 between mile markers 113 and 162.
Highway 61 between mile markers 190 and 230.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4240 10171 4280 10208 4299 10203 4299 10112
TIME...MOT...LOC 0448Z 210DEG 33KT 4261 10173
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
CDCThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 6:09 PM MDT | Severe Thunderstorm Warning | LBF | Garden, Sheridan | 28 min |
| Sep 1, 6:38 PM MDT | Special Weather Statement | LBF | Sheridan | 52 min |
| Sep 1, 7:21 PM MDT | Special Weather Statement | LBF | Sheridan | 54 min |
| Sep 1, 7:48 PM MDT | Special Weather Statement | LBF | Hayes | 42 min |
| Sep 1, 8:30 PM MDT | Special Weather Statement | LBF | Sheridan | 45 min |
| Sep 1, 9:08 PM MDT | Special Weather Statement | LBF | Garden | 52 min |
| Sep 1, 9:13 PM MDT | Special Weather Statement | LBF | Sheridan | 47 min |
| Sep 1, 9:27 PM MDT | Special Weather Statement | LBF | Sheridan | 33 min |
| Sep 1, 9:42 PM MDT | Special Weather Statement | LBF | Arthur | 18 min |
| Sep 1, 9:46 PM MDT | Areal Flood Advisory | LBF | Cherry, Garden, Sheridan | 3 hr |
| Sep 1, 9:55 PM MDT | Special Weather Statement | LBF | Sheridan | 65 min |
| Sep 1, 9:59 PM MDT | Special Weather Statement | LBF | Arthur, Grant | 61 min |
| Sep 1, 10:42 PM MDT | Special Weather Statement | LBF | Arthur | 18 min |
| Sep 1, 11:08 PM MDT | Areal Flood Advisory | LBF | Arthur, Deuel, Garden, Keith, Perkins | 3 hr |
| Sep 1, 11:45 PM MDT | Special Weather Statement | LBF | Arthur | 45 min |
| Sep 1, 11:59 PM MDT | Special Weather Statement | LBF | Logan | 46 min |
| Sep 2, 3:58 PM MDT | Special Weather Statement | LBF | Valley | 32 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2021Every severe thunderstorm warning in 2021
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.