Alert archive / Nebraska / Special Weather Statements in 2017
Special Weather Statement, NWS North Platte, NE
NWS North Platte, NE issued this special weather statement at Aug 12, 2017, 5:44 PM MDT for Chase County, Perkins County, Nebraska. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2017, 5:44 PM MDT (23:44 UTC)
- Expired
- Aug 12, 2017, 6:30 PM MDT
- In force
- 46 min
- Issued by
- NWS North Platte, NE
Counties Chase County, NE, Perkins County, NE
The radar
The North Platte radar (KLNX), 159 km from the middle of the area, began a volume at 23:48 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.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.7 hours before the alert went out and 99 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
- 1071 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS North Platte, NE wrote its last area forecast discussion before this special weather statement went out at Aug 12, 5:37 PM MDT, 7 minutes earlier.
Area forecast discussion, Aug 12, 5:37 PM MDT, 7 minutes before
Area Forecast Discussion...UPDATED National Weather Service North Platte NE 637 PM CDT Sat Aug 12 2017 .UPDATE... Issued at 413 PM CDT Sat Aug 12 2017 Updated zones to add severe thunderstorm watch. && .SHORT TERM...(This evening through Sunday) Issued at 249 PM CDT Sat Aug 12 2017 The HRRR would seem to be the most rational model for the storm activity late this afternoon and tonight. A blend of the Canadian, nam and gfs was the basis for chance showers and thunderstorms Sunday. Storm activity late this afternoon and tonight could organize into 3 clusters off the Colo front range, Laramie range and Black Hills/White river valley where a warm front will be located. A blend of the HRRR and HRRR Exp models was the basis for the storm forecast tonight. The RAP model was taking an atypical storm/propagation southwest from Valentine to Imperial and was discarded for this forecast. POPs are limited to 70 percent as some models like the NAM show the infamous "Lincoln County Split" sending storms through Southwest Nebraska and North Central Nebraska north of Broken Bow. This would produce little or no rain across Lincoln and Custer Counties. Storm activity should exit the forecast area 12z-15z Sunday morning but redevelopment is possible across Wrn and Ncntl Nebraska. This is highly dependent on the tracks of the MCS's tonight. So, POPs Sunday are limited to 30 percent. SPC is placing a slight risk for severe storms across the Nebraska Panhandle for isolated storm development during the afternoon. Winds aloft at 500mb should increase to 30- 40kt late in the afternoon. Temperatures aloft are quite cold today and Sunday, less than 10C at 700mb, and when combined with 30 to 40 kt winds at 500mb and ample moisture, SPC suggested very large hail west of highway 83 late this afternoon and this evening. See the SPC day 1 outlook for additional information. South winds redevelop Sunday and this, presumably, will support highs in the lower 80s with partly cloudy skies. .LONG TERM...(Sunday night through Saturday) Issued at 249 PM CDT Sat Aug 12 2017 The long term forecast period will be characterized by near to slightly below temperatures and a chance for at least isolated thunderstorms daily. By far the best chance for organized widespread thunderstorm activity will be Tuesday evening, when a strong shortwave trough will move east across the Dakotas and Nebraska. A few severe storms will probably occur, but overall shear is rather weak. The bigger threat may be areas of locally heavy rainfall. Really little pattern chance seen this week...as west to northwest flow materializes once again in the wake of Tuesday's shortwave. The upper level high pressure and associated heat will remain well south of our region in TX and LA. && .AVIATION...(For the 00Z TAFS through 00Z Sunday evening) Issued at 631 PM CDT Sat Aug 12 2017 Thunderstorms continue along aand south of a line from KVTN to KAIA. These storms contain large hail. KVTN looks to be on the backside of the system and have left thunder out of the forecast for now. KLBF will see vcts through at least 2z. Line is kind of sporadic and have just carried vcts. Southerly winds to the east of the line and will become light and variable once the thunderstorms get to the east of the station. Some stratus expected around sunrise with MVFR cigs. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && UPDATE...Power SHORT TERM...CDC LONG TERM...Taylor AVIATION...Power
Hazardous weather outlook, Aug 12, 2:21 PM MDT, 3 hours 23 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service North Platte NE 321 PM CDT Sat Aug 12 2017 NEZ004>010-022>029-035>038-056>059-069>071-094-132030- Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden- Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson- Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier- Western Cherry- 321 PM CDT Sat Aug 12 2017 /221 PM MDT Sat Aug 12 2017/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...TONIGHT. Scattered strong to severe thunderstorms are expected this afternoon and evening. The area of concern is generally west of a line from Springview to Rose to Broken Bow. Wind damage and very large hail, 2 inches or larger in diameter, are the primary hazards. An isolated tornado may form and this would be most likely to occur late in the afternoon or early this evening. Locally heavy rainfall will also be possible. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. Sunday and Sunday night holds a risk for isolated strong to severe thunderstorms across much of the area with the best chances in the eastern Nebraska Panhandle and far southwest Nebraska. Large hail and damaging winds are the main hazards. Unsettled conditions continue Monday through Thursday with thunderstorms forecast mainly in the afternoon and night. However, the threat for strong or severe thunderstorms is uncertain at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. && Get your weather, hydrological, and climate information at http://www.weather.gov/northplatte
In the hours before
Special weather statement, Aug 12, 5:08 PM MDT, 36 minutes before
Special Weather Statement National Weather Service North Platte NE 608 PM CDT SAT AUG 12 2017 NEZ008-130000- Brown NE- 608 PM CDT SAT AUG 12 2017 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CHERRY AND WEST CENTRAL BROWN COUNTIES UNTIL 700 PM CDT... At 608 PM CDT, Doppler radar was tracking a strong thunderstorm 10 miles south of Johnstown, or 16 miles southwest of Ainsworth, moving southeast at 10 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Moon Lake. A severe thunderstorm watch remains in effect until midnight CDT for north central Nebraska. LAT...LON 4242 9991 4227 10006 4238 10017 4248 10018 TIME...MOT...LOC 2308Z 305DEG 8KT 4242 10013 CDC
Special weather statement, Aug 12, 5:13 PM MDT, 31 minutes before
Special Weather Statement National Weather Service North Platte NE 513 PM MDT SAT AUG 12 2017 NEZ057-058-130000- Perkins NE-Keith NE- 513 PM MDT SAT AUG 12 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PERKINS AND SOUTH CENTRAL KEITH COUNTIES UNTIL 600 PM MDT... At 513 PM MDT, Doppler radar was tracking a strong thunderstorm five miles south of Ogallala, moving northeast at 10 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Ogallala and Roscoe. This includes the following highways... Highway 61 between mile markers 80 and 86. Interstate 80 in Nebraska between mile markers 127 and 138. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && A severe thunderstorm watch remains in effect until 1100 PM MDT for southwestern Nebraska. LAT...LON 4096 10164 4106 10179 4122 10160 4097 10137 TIME...MOT...LOC 2313Z 217DEG 8KT 4105 10166 Snively
Special weather statement, Aug 12, 5:17 PM MDT, 27 minutes before
Special Weather Statement National Weather Service North Platte NE 617 PM CDT SAT AUG 12 2017 NEZ005-130000- Eastern Cherry NE- 617 PM CDT SAT AUG 12 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHERRY COUNTY UNTIL 700 PM CDT... At 617 PM CDT, Doppler radar was tracking a strong thunderstorm near Brownlee, or 28 miles north of Thedford, moving southeast at 20 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Brownlee, Highway 83 crossing Goose Creek and Highway 83 crossing the North Loup River. This includes Highway 83 between mile markers 163 and 178. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && A severe thunderstorm watch remains in effect until midnight CDT for north central Nebraska. LAT...LON 4238 10067 4242 10060 4234 10023 4212 10061 TIME...MOT...LOC 2317Z 295DEG 19KT 4239 10059 CDC
Special weather statement, Aug 12, 5:18 PM MDT, 26 minutes before
Special Weather Statement National Weather Service North Platte NE 618 PM CDT SAT AUG 12 2017 NEZ007-010-130000- Holt NE-Boyd NE- 618 PM CDT SAT AUG 12 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL HOLT AND SOUTH CENTRAL BOYD COUNTIES UNTIL 700 PM CDT... At 618 PM CDT, Doppler radar was tracking a strong thunderstorm 9 miles north of Atkinson, or 18 miles southwest of Spencer, moving northeast at 30 mph. Dime size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Spencer, Bristow, Spencer Dam and Anncar. This includes the following highways... Highway 281 between mile markers 202 and 214. Highway 12 between mile markers 118 and 121. LAT...LON 4262 9895 4271 9901 4291 9865 4276 9850 TIME...MOT...LOC 2318Z 239DEG 25KT 4267 9894 CDC
Special weather statement, Aug 12, 5:42 PM MDT, 2 minutes before
Special Weather Statement
National Weather Service North Platte NE
642 PM CDT SAT AUG 12 2017
NEZ008-130030-
Brown NE-
642 PM CDT SAT AUG 12 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHERRY AND
SOUTHWESTERN BROWN COUNTIES UNTIL 730 PM CDT...
At 642 PM CDT, Doppler radar was tracking a strong thunderstorm near
Elsmere, or 26 miles southwest of Ainsworth, moving east at 30 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Raven, Willow Lake State Wildlife Management Area and Long Lake State
Wildlife Management Area.
A severe thunderstorm watch remains in effect until midnight CDT for
north central Nebraska.
LAT...LON 4218 9981 4218 10017 4232 10016 4233 10007
4234 9982
TIME...MOT...LOC 2342Z 267DEG 26KT 4226 10018
SnivelySpecial weather statement, Aug 12, 5:44 PM MDT, 0 minutes before
Special Weather Statement National Weather Service North Platte NE 544 PM MDT SAT AUG 12 2017 NEZ058-069-130030- Chase NE-Perkins NE- 544 PM MDT SAT AUG 12 2017 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PERKINS AND NORTHERN CHASE COUNTIES UNTIL 630 PM MDT... At 544 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 9 miles northwest of Madrid to 9 miles southeast of Grant to 6 miles south of Lamar. Movement was east at 10 mph. Dime size hail will be possible with these storms. Locations impacted include... Grant, Madrid, Chase and Wild Horse Spring. This includes Highway 61 between mile markers 44 and 78. PRECAUTIONARY/PREPAREDNESS ACTIONS... These storms may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && A severe thunderstorm watch remains in effect until 1100 PM MDT for southwestern Nebraska. LAT...LON 4100 10179 4100 10144 4062 10144 4040 10205 TIME...MOT...LOC 2344Z 249DEG 7KT 4098 10162 4073 10165 4047 10198 CDC
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 6:02 PM MDT | Special Weather Statement | LBF | Sheridan | 43 min |
| Aug 12, 1:48 PM MDT | Special Weather Statement | LBF | Brown | 42 min |
| Aug 12, 2:17 PM MDT | Special Weather Statement | LBF | Brown | 43 min |
| Aug 12, 2:33 PM MDT | Special Weather Statement | LBF | Thomas | 42 min |
| Aug 12, 2:47 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Thomas | 32 min |
| Aug 12, 3:04 PM MDT | Special Weather Statement | LBF | Brown | 41 min |
| Aug 12, 3:07 PM MDT | Special Weather Statement | LBF | Cherry | 38 min |
| Aug 12, 3:16 PM MDT | Severe Thunderstorm Warning | LBF | Brown | 44 min |
| Aug 12, 3:18 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Brown | 28 min |
| Aug 12, 3:23 PM MDT | Special Weather Statement | LBF | Blaine | 52 min |
| Aug 12, 3:35 PM MDT | Special Weather Statement | LBF | Keya Paha | 40 min |
| Aug 12, 3:50 PM MDT | Special Weather Statement | LBF | Cherry | 40 min |
| Aug 12, 3:53 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Thomas | 37 min |
| Aug 12, 3:55 PM MDT | Special Weather Statement | LBF | Brown | 50 min |
| Aug 12, 4:22 PM MDT | Severe Thunderstorm Warning | LBF | Custer, Logan | 38 min |
| Aug 12, 4:30 PM MDT | Special Weather Statement | LBF | Brown | 45 min |
| Aug 12, 4:31 PM MDT | Special Weather Statement | LBF | Holt | 44 min |
| Aug 12, 4:33 PM MDT | Special Weather Statement | LBF | Cherry | 42 min |
| Aug 12, 4:51 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 54 min |
| Aug 12, 4:56 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 49 min |
| Aug 12, 5:04 PM MDT | Severe Thunderstorm Warning | LBF | Brown, Rock | 41 min |
| Aug 12, 5:08 PM MDT | Special Weather Statement | LBF | Brown | 52 min |
| Aug 12, 5:13 PM MDT | Special Weather Statement | LBF | Keith | 47 min |
| Aug 12, 5:16 PM MDT | Severe Thunderstorm Warning | LBF | Boyd, Keya Paha | 44 min |
| Aug 12, 5:17 PM MDT | Special Weather Statement | LBF | Brown | 43 min |
| Aug 12, 5:18 PM MDT | Special Weather Statement | LBF | Boyd | 42 min |
| Aug 12, 5:25 PM MDT | Severe Thunderstorm Warning | LBF | Blaine, Loup | 50 min |
| Aug 12, 5:34 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 41 min |
| Aug 12, 5:40 PM MDT | Severe Thunderstorm Warning | LBF | Custer | 50 min |
| Aug 12, 5:42 PM MDT | Special Weather Statement | LBF | Brown | 48 min |
| Aug 12, 5:45 PM MDT | Severe Thunderstorm Warning | LBF | Brown, Rock | 30 min |
| Aug 12, 5:56 PM MDT | Special Weather Statement | LBF | Deuel | 49 min |
| Aug 12, 5:58 PM MDT | Special Weather Statement | LBF | Boyd | 32 min |
Nearby
Special Weather Statements in Nebraska, 2017Every special weather statement in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.