Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 94, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at May 21, 2012, 4:03 PM MDT for Arthur County, Keith County, Nebraska. It was in force for 42 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, 4:03 PM MDT (22:03 UTC)
- Expired
- May 21, 2012, 4:45 PM MDT
- In force
- 42 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), 106 km from the middle of the area, began a volume at 22:06 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, 4:04 PM MDT | HAIL 1 | 11 Sw Arthur, NE | A FEW QUARTER SIZE STONES...BUT MOST WERE HALF INCH OR SMALLER. |
| May 21, 4:50 PM MDT | HAIL 1 | 5 N Lemoyne, NE | LARGEST HAIL TO THE SIZE OF QUARTERS...GROUND COVERED WHITE. |
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, 10.1 hours before the alert went out and 96 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.
207 WUUS53 KLBF 212203 SVRLBF NEC005-101-212245- /O.NEW.KLBF.SV.W.0094.120521T2203Z-120521T2245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORTH PLATTE NE 403 PM MDT MON MAY 21 2012 THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN ARTHUR COUNTY IN WEST CENTRAL NEBRASKA... NORTH CENTRAL KEITH COUNTY IN SOUTHWEST NEBRASKA... * UNTIL 445 PM MDT * AT 357 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 10 MILES NORTH OF OTTER CREEK CAMPGROUND...OR 14 MILES SOUTHWEST OF ARTHUR...AND MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL KEITH AND SOUTHERN ARTHUR COUNTIES...INCLUDING THE FOLLOWING LOCATIONS HIGHWAY 61 MILE MARKER 110. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. 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 4161 10145 4125 10148 4134 10193 4150 10199 TIME...MOT...LOC 2203Z 279DEG 20KT 4143 10184 WIND...HAIL <50MPH 1.00IN $$ ROBERG
2 follow-up statements
775 WWUS53 KLBF 212223 SVSLBF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 523 PM CDT MON MAY 21 2012 NEC005-101-212245- /O.CON.KLBF.SV.W.0094.000000T0000Z-120521T2245Z/ KEITH NE-ARTHUR NE- 423 PM MDT MON MAY 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ARTHUR AND NORTH CENTRAL KEITH COUNTIES UNTIL 445 PM MDT... AT 420 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 9 MILES NORTH OF LEMOYNE...OR 12 MILES SOUTH OF ARTHUR...MOVING EAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL KEITH AND SOUTHERN ARTHUR COUNTIES...INCLUDING THE FOLLOWING LOCATIONS HIGHWAY 61 MILE MARKER 110. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4152 10190 4161 10145 4125 10148 4134 10193 TIME...MOT...LOC 2223Z 282DEG 17KT 4141 10176 WIND...HAIL <50MPH 1.00IN $$ ROBERG
913 WWUS53 KLBF 212239 SVSLBF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 539 PM CDT MON MAY 21 2012 NEC005-101-212245- /O.CON.KLBF.SV.W.0094.000000T0000Z-120521T2245Z/ KEITH NE-ARTHUR NE- 439 PM MDT MON MAY 21 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ARTHUR AND NORTH CENTRAL KEITH COUNTIES UNTIL 445 PM MDT... AT 434 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR OTTER CREEK CAMPGROUND...OR 16 MILES NORTHWEST OF OGALLALA...MOVING EAST AT 25 MPH. THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL KEITH AND SOUTHERN ARTHUR COUNTIES...INCLUDING THE FOLLOWING LOCATIONS HIGHWAY 61 MILE MARKER 110. 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 4152 10190 4161 10145 4125 10148 4134 10193 TIME...MOT...LOC 2239Z 267DEG 20KT 4134 10182 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, 4:44 PM MDT | Severe Thunderstorm Warning | LBF | Arthur, Keith | 46 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.