Alert archive / Nebraska / Special Weather Statements in 2016

Special Weather Statement, NWS North Platte, NE

May 25, 2016Sheridan County, Nebraska

NWS North Platte, NE issued this special weather statement at May 25, 2016, 2:04 PM MDT for Sheridan County, Nebraska. It was in force for 41 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: May 25, 2016, 2:04 PM MDT (20:04 UTC)
Expired: May 25, 2016, 2:45 PM MDT
In force: 41 min
Issued by: NWS North Platte, NE

County Sheridan County, NE

The radar

The North Platte radar (KLNX), 153 km from the middle of the area, began a volume at 20:06 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.

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 8.1 hours before the alert went out and 156 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 894 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 May 25, 1:26 PM MDT, 38 minutes earlier.

Area forecast discussion, May 25, 1:26 PM MDT, 38 minutes before

Area Forecast Discussion
National Weather Service North Platte NE
226 PM CDT WED MAY 25 2016

.SHORT TERM...(This evening through Thursday)
Issued at 226 PM CDT Wed May 25 2016

Tonight and Thursday...a fast moving batch of high based showers and
thunderstorms move across the fcst area this aftn and exit around
06z this evening. The main risk is gusty winds with the NAM and HRRR
showing 40 to 50kt sfc wind gusts. Ground truth winds would probably
be 40 to 50 mph. This disturbance will send a weak cold front
through the fcst area into Nrn KS which will be the focus for severe
weather late Thursday aftn...23z or so.

The area of concern for severe weather Thursday is mainly along and
south of Interstate 80 where 800mb computed cape rises to over 3000
j/kg. The forecast area is in easterlies north of a stationary front
with dew points in the upper 50s per NAM. Nonetheless bufkit shows
an environment favoring dominant right moving supercells with high
cape at McCook. The situation at North Platte is much stabler with
less cape favoring shallower storms.

SPC has outlooked Swrn Neb for severe weather and if the moisture
shows up and storms are able become rooted in the lower levels vs
remain elevated...then severe weather should develop.

.LONG TERM...(Thursday night through Wednesday)
Issued at 226 PM CDT Wed May 25 2016

Thursday night...Severe thunderstorms possible, especially during
the evening. A warm front will beceom positioned near the
Nebraska/Kansa border early Thursday evening. Severe parameters
suggest the potential for some very large hail greater than 2
inches diameter, damaging winds, and a few tornadoes. The area of
greatest concern will be south of an Ogallala through Broken Bow
line. 0-3km mucapes of 2000-4000 j/kg with a 0-2km vgp gradient
present. Granted, some changes with position of front, surface
dewpoints, and low/mid level shear will occur, which will alter
postion of the greatest severe potential.

Friday/Friday night into Saturday...a closed upper low will track
from eastern Colorado, across Nebraska into the eastern Dakotas.
While the sever potential will be less, of greater concern will be
locally heavy rainfall with amounts up to 2 inches possible. Much
of this rainfall will fall in the North Platte Basin, South Platte
Basin, and Elkhorn Basin. Other increased chances for
thunderstorms arrive Memorial Day into Tuesday as a northern stream
trough drops into the Northern and Central Plains.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1222 PM CDT Wed May 25 2016

The showers...or perhaps developing isolated tstms...across Ern
Wy and Wrn Neb should move rapidly east this afternoon and this
evening. The NAM and HRRR models suggest wind gust potential from
dry downbursts reaching 40 to 50kt in the model which might mean
30 to 40kt ground truth. This activity should move east at around
40 mph and exit the fcst area around 06z or sooner. VFR is
expected all areas thereafter through 18z Thursday.

&&

.HYDROLOGY...
Issued at 226 PM CDT Wed May 25 2016

North Platte river...an additional water release of 1000 cfs
from lake McConaughy is underway which will pass 3500 cfs through
North Platte and raise the river to near 6.9 ft over the
weekend...just below major flood stage...7.0 ft. This in turn will
cause the Platte river at Brady to reach flood stage early next week.

High river flows will continue on the South Platte river. The models
suggest heavy thunderstorms may form over Northeast Colo Friday
which could eventually cause higher flows on the South Platte and
Platte rivers.

&&

.LBF Watches/Warnings/Advisories...
None.
&&

SHORT TERM...CDC
LONG TERM...Roberg
AVIATION...CDC
HYDROLOGY...CDC

Hazardous weather outlook, May 25, 8:36 AM MDT, 5 hours 28 minutes before

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In the hours before

Local storm report, May 25, 8:22 AM MDT, 5 hours 42 minutes before

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Local storm report, May 25, 10:27 AM MDT, 3 hours 37 minutes before

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Local storm report, May 25, 10:28 AM MDT, 3 hours 36 minutes before

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Local storm report, May 25, 11:19 AM MDT, 2 hours 45 minutes before

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Special weather statement, May 25, 1:29 PM MDT, 35 minutes before

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Special weather statement, May 25, 2:04 PM MDT, 0 minutes before

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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 6:45 PM MDT	Special Weather Statement	LBF	Deuel	45 min
May 24, 7:02 PM MDT	Special Weather Statement	LBF	Garden	43 min
May 24, 7:23 PM MDT	Special Weather Statement	LBF	Deuel, Garden	52 min
May 24, 7:36 PM MDT	Special Weather Statement	LBF	Sheridan	39 min
May 24, 8:03 PM MDT	Special Weather Statement	LBF	Keith, Perkins	42 min
May 24, 8:05 PM MDT	Special Weather Statement	LBF	Sheridan	25 min
May 24, 8:10 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Keith, Perkins	50 min
May 24, 8:21 PM MDT	Tornado Warning	LBF	Chase	24 min
May 24, 8:44 PM MDT	Tornado Warning	LBF	Chase	31 min
May 24, 8:59 PM MDT	Special Weather Statement	LBF	Cherry	46 min
May 24, 9:00 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, Perkins	45 min
May 24, 9:15 PM MDT	Tornado Warning	LBF	Chase	30 min
May 24, 9:38 PM MDT	Severe Thunderstorm Warning	LBF	Hayes	52 min
May 24, 9:39 PM MDT	Special Weather Statement	LBF	Lincoln	51 min
May 24, 9:40 PM MDT	Special Weather Statement	LBF	Cherry	50 min
May 24, 9:43 PM MDT	Special Weather Statement	LBF	Logan, Thomas	47 min
May 24, 10:05 PM MDT	Special Weather Statement	LBF	Cherry	40 min
May 24, 10:15 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	45 min
May 24, 10:38 PM MDT	Special Weather Statement	LBF	Blaine, Custer, Loup	52 min
May 24, 10:40 PM MDT	Special Weather Statement	LBF	Brown, Keya Paha	50 min
May 24, 10:49 PM MDT	Severe Thunderstorm Warning	LBF	Custer	56 min
May 24, 10:57 PM MDT	Special Weather Statement	LBF	Frontier	48 min
May 24, 10:59 PM MDT	Severe Thunderstorm Warning	LBF	Chase	46 min
May 24, 11:29 PM MDT	Special Weather Statement	LBF	Boyd, Garfield, Holt, Rock, Wheeler	61 min
May 24, 11:45 PM MDT	Severe Thunderstorm Warning	LBF	Chase	45 min
May 25, 12:06 AM MDT	Special Weather Statement	LBF	Boyd, Garfield, Holt, Wheeler	54 min
May 25, 12:22 AM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes, Lincoln, Perkins	38 min
May 25, 12:59 AM MDT	Special Weather Statement	LBF	Keith	46 min
May 25, 1:22 AM MDT	Special Weather Statement	LBF	Lincoln	38 min
May 25, 2:01 AM MDT	Special Weather Statement	LBF	Perkins	44 min
May 25, 1:29 PM MDT	Special Weather Statement	LBF	Sheridan	46 min
May 25, 2:14 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	46 min
May 25, 3:57 PM MDT	Special Weather Statement	LBF	Sheridan	48 min
May 25, 4:52 PM MDT	Special Weather Statement	LBF	Sheridan	38 min
May 25, 4:57 PM MDT	Special Weather Statement	LBF	Keith, Perkins	48 min
May 25, 5:32 PM MDT	Special Weather Statement	LBF	Cherry	43 min
May 25, 5:47 PM MDT	Special Weather Statement	LBF	Chase	43 min
May 25, 5:55 PM MDT	Severe Thunderstorm Warning	LBF	Boyd, Holt	65 min

Nearby

Special Weather Statements in Nebraska, 2016 Every special weather statement in 2016

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.