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 1, 2017, 3:56 PM MDT for Grant County, Nebraska. It was in force for 34 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 1, 2017, 3:56 PM MDT (21:56 UTC)
- Expired
- Aug 1, 2017, 4:30 PM MDT
- In force
- 34 min
- Issued by
- NWS North Platte, NE
County Grant County, NE
The radar
The North Platte radar (KLNX), 101 km from the middle of the area, began a volume at 21:59 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, 9.9 hours before the alert went out and 153 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
- 931 J/kg
- Mixed-layer CIN
- -158 J/kg
- Mixed-layer LCL
- 1104 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 1, 2:09 PM MDT, 1 hour 47 minutes earlier.
Area forecast discussion, Aug 1, 2:09 PM MDT, 1 hour 47 minutes before
Area Forecast Discussion National Weather Service North Platte NE 309 PM CDT Tue Aug 1 2017 .SYNOPSIS... Issued at 309 PM CDT Tue Aug 1 2017 H5 Ridging across the western CONUS continues this morning and has shifted slightly west over the past 24 hours. High pressure extended from northern Nevada west to off the coast of California. A ridge extended north into the Alaska panhandle and the Yukon this morning. Downstream of this ridge, a closed low was present over far northern Canada with a trough of low pressure extending south to Hudson Bay. Between these two features, a strong shortwave trough was present over northern Alberta with a secondary shortwave over southern Manitoba. Another weaker wave was present over northwestern South Dakota. This feature has progressed southeast over the past 3 to 6 hours, and has led to the development of thunderstorms over central South Dakota this morning. This activity has since moved into south central South Dakota and northeastern portions of the forecast area. Further south, mostly clear skies were present over the central and western Sandhills as well as the eastern panhandle and portions of southwestern Nebraska. Some cloudiness was present over portions of central Nebraska. Temperatures as of 2 PM CDT ranged from 79 at Valentine to 90 at Ogallala. && .SHORT TERM...(This evening through Wednesday night) Issued at 309 PM CDT Tue Aug 1 2017 For this evening, will be evaluating ongoing thunderstorms in the northeast and will be adjusting the timing of them for the evening forecast. Two areas are favored for thunderstorms tonight. The first in the northeastern CWA where lingering thunderstorms from this afternoon will track southeast from south central South Dakota. The second area is across the west and northwestern forecast area. A shortwave, currently over western Montana, will track to the east southeast this evening before emerging across western South Dakota overnight. There will be a limited threat for thunderstorms in the western CWA this evening as convection drifts southeast off of the Black Hills and eastern Wyoming. This activity is expected dissipate this evening. Overnight, toward 12z Wednesday, thunderstorms are expected to develop over western South Dakota and track southeast, approaching northwestern portions of the forecast area toward 12z Wednesday. convection will linger across northern Nebraska Wednesday morning, then redevelop Wednesday afternoon as a cold front approaches northern Nebraska. This front will push through the area late Wednesday into Wednesday evening. This will be the best chance for widespread convection, particularly in north and eastern cwa where dynamics aloft are co-located with the frontal posn. Further south and west, thunderstorm chances do not look nearly as probable, but given the strength of the cold front, felt at least a slight chance mention in the southwest was warranted here. .LONG TERM...(Thursday through Tuesday) Issued at 309 PM CDT Tue Aug 1 2017 Thursday through Friday...The cold front will be forced well south of the area Thursday into Thursday night with dry and cool conditions expected. The latest EC and MEX guidance touch the upper 40s across most of the forecast area Friday morning. This seems reasonable given the degree of dry air moving in behind the front, light winds and strong high pressure which is anchored over central Nebraska at 12z Friday. Highs Thursday will struggle to get out of the mid 70s due to the degree of strong CAA behind the exiting front, and the threat for cloud cover to linger, especially across the north and northeastern forecast area. Friday will see a slight rebound in temperatures as high pressure move southeast into northern Missouri. This will lead to increased southerly winds across western and north central Nebraska. Friday night through Tuesday...The increased southerly winds Friday, will begin to lift a warm front into southwestern Nebraska and the eastern Nebraska panhandle. Both the EC and GFS solutions, develop convection within the northwesterly flow aloft Friday night INVOF of the frontal boundary. The EC solution develops most of its convection in the northeastern cwa while the GFS develops most of its convection in southwestern Nebraska which seems most reasonable as this is where the surface frontal boundary is located. This boundary will progress east on Saturday into Saturday evening with thunderstorm chances spreading east. The threat will linger come to an end Sunday as another strong cold front pushes through the region. Dry and seasonal conditions will follow on Monday into Tuesday && .AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon) Issued at 1236 PM CDT Tue Aug 1 2017 The main aviation concern for the next day will be the chance for afternoon thunderstorms across the northern portion of the forecast area. Thunderstorms are already developing across South Dakota and are expected to drift southward throughout the remainder of the afternoon. Current thinking is that thunderstorms will track just east of KVTN and not directly impact the terminal. Vicinity storms have been included in the forecast to account for storms moving southeastward across north central Nebraska. Best chance for storm development will be between 3pm and 8pm. For later tonight and Wednesday morning, ceilings remain above 10000 feet with VFR conditions prevailing. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...Buttler SHORT TERM...Buttler LONG TERM...Buttler AVIATION...Kulik
Hazardous weather outlook, Aug 1, 10:08 AM MDT, 5 hours 48 minutes before
Hazardous Weather Outlook National Weather Service North Platte NE 1108 AM CDT Tue Aug 1 2017 NEZ004>010-022>029-035>038-056>059-069>071-094-021615- 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- 1108 AM CDT Tue Aug 1 2017 /1008 AM MDT Tue Aug 1 2017/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...THIS AFTERNOON AND TONIGHT. Thunderstorms are possible this afternoon and tonight, with a few strong storms possible in north central Nebraska. Gusty winds to around 50 mph and hail up to nickel size will be possible. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. A more organized threat for thunderstorms exists Wednesday afternoon and Wednesday night as a cold front pushes through. Strong to severe thunderstorms possible. Large hail and damaging wind gusts will be possible with the strongest storms. Thunderstorms will again be possible this weekend. At this time, the threat for severe storms is low. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight. && Get your weather, hydrological, and climate information at http://www.weather.gov/northplatte CLB
In the hours before
Special weather statement, Aug 1, 2:10 PM MDT, 1 hour 46 minutes before
Special Weather Statement National Weather Service North Platte NE 210 PM MDT TUE AUG 1 2017 NEZ004-094-012045- Sheridan NE-Western Cherry NE- 210 PM MDT TUE AUG 1 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CHERRY AND NORTHEASTERN SHERIDAN COUNTIES UNTIL 245 PM MDT... At 209 PM MDT, Doppler radar was tracking a strong thunderstorm 10 miles north of Gordon, moving southeast at 15 mph. Nickel size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Gordon, Merriman, Hoover Lake, Irwin, Intersection of Highway 20 and Irwin Road, Shell Lake State Wildlife Management Area and Bayonne. This includes the following highways... Highway 20 between mile markers 105 and 139. Highway 61 between mile markers 224 and 229. LAT...LON 4300 10175 4292 10163 4269 10217 4300 10235 TIME...MOT...LOC 2009Z 303DEG 12KT 4296 10214 Gomez
Special weather statement, Aug 1, 3:00 PM MDT, 56 minutes before
Special Weather Statement National Weather Service North Platte NE 300 PM MDT TUE AUG 1 2017 NEZ004-094-012130- Sheridan NE-Western Cherry NE- 300 PM MDT TUE AUG 1 2017 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CHERRY AND EAST CENTRAL SHERIDAN COUNTIES UNTIL 330 PM MDT... At 300 PM MDT, Doppler radar was tracking a strong thunderstorm 15 miles southeast of Gordon, moving southeast at 30 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Highway 61 crossing the Snake River, Highway 27 crossing the Niobrara River, Rock Hill, Bayonne and Morgan Lake. This includes the following highways... Highway 20 between mile markers 113 and 118. Highway 61 between mile markers 199 and 204. LAT...LON 4265 10229 4285 10201 4259 10166 4239 10191 TIME...MOT...LOC 2100Z 317DEG 26KT 4264 10201 Gomez
Special weather statement, Aug 1, 3:56 PM MDT, 0 minutes before
Special Weather Statement National Weather Service North Platte NE 356 PM MDT TUE AUG 1 2017 NEZ023-094-012230- Grant NE-Western Cherry NE- 356 PM MDT TUE AUG 1 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHERRY AND NORTH CENTRAL GRANT COUNTIES UNTIL 430 PM MDT... At 356 PM MDT, Doppler radar was tracking a strong thunderstorm 14 miles north of Hyannis, or 39 miles west of Mullen, moving southeast at 30 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Dipping Vat Meadow and Mother Lake. This includes Highway 61 between mile markers 161 and 182. LAT...LON 4233 10173 4209 10152 4201 10184 4225 10198 TIME...MOT...LOC 2156Z 330DEG 24KT 4221 10178 ET
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 5:31 AM MDT | Dense Fog Advisory | LBF | Frontier, Hayes, Keith, Lincoln | 4 hr |
| Aug 1, 3:00 PM MDT | Special Weather Statement | LBF | Sheridan | 30 min |
| Aug 1, 3:31 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 29 min |
| Aug 1, 4:59 PM MDT | Special Weather Statement | LBF | Arthur, Deuel, Garden, Grant, Hooker, Keith and 2 more | 61 min |
| Aug 1, 5:50 PM MDT | Special Weather Statement | LBF | Keith, Perkins | 55 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.