Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 95, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at May 21, 2012, 4:44 PM MDT for Arthur County, Keith County, Nebraska. It was in force for 46 min. 2 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
- May 21, 2012, 4:44 PM MDT (22:44 UTC)
- Expired
- May 21, 2012, 5:30 PM MDT
- In force
- 46 min
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Arthur County, NE, Keith County, NE
The radar
The North Platte radar (KLNX), 110 km from the middle of the area, began a volume at 22:47 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 |
|---|---|---|---|
| May 21, 4:50 PM MDT | HAIL 1 | 5 N Lemoyne, NE | LARGEST HAIL TO THE SIZE OF QUARTERS...GROUND COVERED WHITE. |
| May 21, 4:50 PM MDT | HAIL 1 | Kingsley Dam, NE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.7 hours before the alert went out and 89 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1478 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 314 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
808 WUUS53 KLBF 212244 SVRLBF NEC005-101-212330- /O.NEW.KLBF.SV.W.0095.120521T2244Z-120521T2330Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 444 PM MDT MON MAY 21 2012 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN ARTHUR COUNTY IN WEST CENTRAL NEBRASKA... NORTHERN KEITH COUNTY IN SOUTHWEST NEBRASKA... * UNTIL 530 PM MDT * AT 438 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR LEMOYNE...OR 14 MILES NORTH OF OGALLALA... AND MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... KEYSTONE AROUND 510 PM MDT. OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE HIGHWAY 61 MILE MARKER 100. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4145 10143 4113 10143 4125 10200 4148 10182 TIME...MOT...LOC 2245Z 274DEG 19KT 4132 10177 WIND...HAIL <50MPH 1.00IN $$ ROBERG
2 follow-up statements
734 WWUS53 KLBF 212302 SVSLBF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 602 PM CDT MON MAY 21 2012 NEC005-101-212330- /O.CON.KLBF.SV.W.0095.000000T0000Z-120521T2330Z/ KEITH NE-ARTHUR NE- 502 PM MDT MON MAY 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ARTHUR AND NORTHERN KEITH COUNTIES UNTIL 530 PM MDT... AT 457 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 5 MILES NORTHEAST OF LEMOYNE...OR 14 MILES NORTH OF OGALLALA...MOVING EAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTHERN KEITH AND SOUTHEASTERN ARTHUR COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4146 10174 4145 10143 4113 10143 4125 10200 TIME...MOT...LOC 2301Z 273DEG 17KT 4133 10169 WIND...HAIL <50MPH 1.00IN $$ ROBERG
167 WWUS53 KLBF 212319 SVSLBF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 519 PM MDT MON MAY 21 2012 NEC005-101-212330- /O.CON.KLBF.SV.W.0095.000000T0000Z-120521T2330Z/ KEITH NE-ARTHUR NE- 519 PM MDT MON MAY 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ARTHUR AND NORTHERN KEITH COUNTIES UNTIL 530 PM MDT... AT 515 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR LEMOYNE...OR 8 MILES NORTH OF OGALLALA... MOVING EAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... KEYSTONE AROUND 530 PM MDT. OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE KINGSLEY DAM. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4146 10163 4145 10143 4113 10143 4122 10187 TIME...MOT...LOC 2319Z 280DEG 17KT 4125 10170 WIND...HAIL <50MPH 1.00IN $$ ROBERG
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 2:30 PM MDT | Wind Advisory | LBF | Blaine, Boyd, Brown, Cherry, Custer, Garfield and 7 more | 30 hr |
| May 21, 4:03 PM MDT | Severe Thunderstorm Warning | LBF | Arthur, Keith | 42 min |
| May 21, 5:29 PM MDT | Severe Thunderstorm Warning | LBF | Keith | 46 min |
| May 21, 5:57 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 48 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2012Every severe thunderstorm warning in 2012
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.