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 Jul 4, 2017, 4:55 PM CDT for Custer County, Nebraska. It was in force for 50 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
- Jul 4, 2017, 4:55 PM CDT (21:55 UTC)
- Expired
- Jul 4, 2017, 5:45 PM CDT
- In force
- 50 min
- Issued by
- NWS North Platte, NE
County Custer County, NE
The radar
The North Platte radar (KLNX), 60 km from the middle of the area, began a volume at 21:58 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
Denver, CO (KDEN), launched 12:00Z, 9.9 hours before the alert went out and 328 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
- 2897 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 66 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 Jul 4, 3:20 PM CDT, 1 hour 35 minutes earlier.
Area forecast discussion, Jul 4, 3:20 PM CDT, 1 hour 35 minutes before
Area Forecast Discussion National Weather Service North Platte NE 320 PM CDT Tue Jul 4 2017 .SHORT TERM...(This evening through Wednesday) Issued at 300 PM CDT Tue Jul 4 2017 Weather highlights over the next 24 hours include: possibility of isolated thunderstorms through early tonight and highs above seasonal normal values tomorrow. Highs are forecast 5 to 15 degrees above normal with the greatest departures in northwest NEB. Latest water vapor shows a weak shortwave trough moving east roughly over southern Manitoba towards the Black Hills with another weak disturbance near northeast WY. Meanwhile, an upper level ridge continues to build across the western CONUS from the Southwest US into the Northern Rockies and Northern High Plains. Latest surface plot show a broad surface trough stretching from western Manitoba to the Dakotas into the Central High Plains. Latest visible satellite shows a growing diurnal cu field across central NEB expanding west into parts of Lincoln, Hayes, and Frontier counties. Of which, cu appears more enhanced across north central NEB where there is enhanced growth/towering cu. A few modest radar echoes have been seen. There is potential for isolated showers/thunderstorms mid- afternoon into the evening today, albeit with low confidence, across the Sandhills north and over north central NEB. While instability appears adequate, there is uncertainty associated with the focus and forcing in the current setup. Weak surface toughing and upslope flow is present and moisture appears sufficient with surface dewpoints ranging from the low 50s into the mid 60s. Current thinking is thunderstorms will be isolated if they materialize. Concerns with any strong storms would be strong gusts and small hail, especially the former given the environment is characterized by a dry sub-cloud layer given model soundings and moderate surface dew point depressions (generally 20-40 F). Threat for storms should diminish this evening with clearing skies taking hold. Mostly sunny skies will prevail tomorrow with highs in the 90s. .LONG TERM...(Wednesday night through Tuesday) Issued at 312 PM CDT Tue Jul 4 2017 Wednesday night through Monday night...An upper level ridge of High pressure will remain in place of the western CONUS over the next several days. This will bring hot and mostly dry conditions over the high plains. There will be some isolated chances for thunderstorms Thursday, Friday and Saturday however confidence is low. The greatest chance and confidence in thunderstorm development will be Thursday late afternoon into the overnight as a weak frontal boundary will push through the area. This may give just enough forcing to initiate a few thunderstorms across the CWA...especially since we will have adequate daytime heating with temperatures in the upper 90s to even 100 degrees possible across far southwest Nebraska. After the front passes temperatures will cool slightly on Friday and Saturday with highs in the mid to upper 80s. Temperatures warm back into the low 90s Sunday and Monday. && .AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon) Issued at 1229 PM CDT Tue Jul 4 2017 Latest satellite imagery shows diurnally driven cu developing and expanding across south central NEB to north central NEB into parts of Lincoln and Frontier counties. Latest surface plot shows these cloud bases largely around 3-5 kft with SCT-BKN coverage. These clouds should dissipate early evening with the loss of daytime heating. Otherwise, there are a few areas of mid/high level clouds moving east across north central NEB. Main concern is possible isolated showers/thunderstorms this afternoon/evening. Of which, the area of concern is generally confined to north central NEB and northern NEB. However, overall confidence with respect to their occurrence and them impacting terminals is low given expected coverage (isolated) thus no mention in KVTN TAF. Any thunderstorms should dissipate as well by the early evening if they materialize. Thereafter, mostly clear skies should prevail tonight and tomorrow. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...ET LONG TERM...Gomez AVIATION...ET
Hazardous weather outlook, Jul 4, 4:00 PM CDT, 55 minutes before
Hazardous Weather Outlook National Weather Service North Platte NE 400 PM CDT Tue Jul 4 2017 NEZ004>010-022>029-035>038-056>059-069>071-094-052100- 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- 400 PM CDT Tue Jul 4 2017 /300 PM MDT Tue Jul 4 2017/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...TONIGHT. Thunderstorms are possible across the Sandhills north and over north central NEB. A few storms may be be strong and could approach severe levels briefly with both damaging winds and large hail possible. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. There is a marginal risk for strong to briefly severe thunderstorms Thursday afternoon and evening over western Nebraska. The main threats with any severe thunderstorms would be damaging winds and large hail. The current weather pattern will bring slight chances of thunderstorms to western Nebraska Friday through Sunday, mainly in the late afternoon and early evening. At this time the threat for organized severe weather 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 ET
In the hours before
Special weather statement, Jul 4, 4:55 PM CDT, 0 minutes before
Special Weather Statement National Weather Service North Platte NE 455 PM CDT TUE JUL 4 2017 NEZ038-042245- Custer NE- 455 PM CDT TUE JUL 4 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CUSTER COUNTY UNTIL 545 PM CDT... At 455 PM CDT, Doppler radar was tracking a strong thunderstorm 9 miles west of Anselmo, or 24 miles northwest of Broken Bow. This storm was nearly stationary. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Pleasant Hill. This includes the following highways... Highway 2 near mile marker 253. Highway 92 between mile markers 253 and 269. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4165 10017 4168 9993 4148 9983 4144 10018 TIME...MOT...LOC 2155Z 351DEG 3KT 4160 10004 Buttler
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 7:09 PM CDT | Special Weather Statement | LBF | Chase | 51 min |
| Jul 3, 7:13 PM CDT | Special Weather Statement | LBF | Garden | 47 min |
| Jul 3, 8:01 PM CDT | Special Weather Statement | LBF | Keith | 44 min |
| Jul 3, 8:34 PM CDT | Special Weather Statement | LBF | Cherry | 41 min |
| Jul 4, 4:59 PM CDT | Special Weather Statement | LBF | Blaine | 46 min |
| Jul 4, 5:42 PM CDT | Special Weather Statement | LBF | Logan | 48 min |
| Jul 4, 6:28 PM CDT | Special Weather Statement | LBF | Logan | 47 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.