Alert archive / Nebraska / Special Weather Statements in 2016

Special Weather Statement, NWS North Platte, NE

July 31, 2016Boyd County, Nebraska

NWS North Platte, NE issued this special weather statement at Jul 31, 2016, 3:21 AM CDT for Boyd County, Nebraska. It was in force for 39 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 31, 2016, 3:21 AM CDT (08:21 UTC)
Expired: Jul 31, 2016, 4:00 AM CDT
In force: 39 min
Issued by: NWS North Platte, NE

County Boyd County, NE

The radar

The North Platte radar (KLNX), 180 km from the middle of the area, began a volume at 08:22 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

Aberdeen, SD (KABR), launched 00:00Z, 8.4 hours before the alert went out and 234 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: 24 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1948 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

171 
WWUS83 KLBF 310821
SPSLBF

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
321 AM CDT SUN JUL 31 2016
 
NEZ007-010-310900-
HOLT NE-BOYD NE-
321 AM CDT SUN JUL 31 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN HOLT AND CENTRAL BOYD
COUNTIES UNTIL 400 AM CDT...

AT 321 AM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM NEAR NAPER TO 10 MILES NORTH OF STUART.
MOVEMENT WAS EAST AT 40 MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
SPENCER...BUTTE...LYNCH...BRISTOW...DUSTIN...ANOKA...
PARSHALL BRIDGE STATE WILDLIFE MANAGEMENT AREA...
HULL LAKE STATE WILDLIFE MANAGEMENT AREA...SCOTTVILLE...
SPENCER DAM...MIDWAY AND ANNCAR.

THIS INCLUDES HIGHWAY 281 BETWEEN MILE MARKERS 189 AND 219.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT FOR
NORTH CENTRAL NEBRASKA.

LAT...LON 4292 9839 4250 9859 4273 9919 4299 9903
TIME...MOT...LOC 0821Z 281DEG 33KT 4296 9902 4275 9916 

$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 8:12 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	63 min
Jul 30, 11:17 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	43 min
Jul 30, 11:57 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	63 min
Jul 31, 12:39 AM CDT	Severe Thunderstorm Warning	LBF	Cherry	51 min
Jul 31, 1:12 AM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha	48 min
Jul 31, 1:56 AM CDT	Special Weather Statement	LBF	Blaine, Brown, Hooker, Thomas	49 min
Jul 31, 2:01 AM CDT	Special Weather Statement	LBF	Grant	44 min
Jul 31, 2:04 AM CDT	Special Weather Statement	LBF	Keya Paha	41 min
Jul 31, 2:40 AM CDT	Special Weather Statement	LBF	Keya Paha	50 min
Jul 31, 2:41 AM CDT	Special Weather Statement	LBF	Grant	49 min
Jul 31, 2:43 AM CDT	Special Weather Statement	LBF	Brown, Thomas	47 min
Jul 31, 2:51 AM CDT	Severe Thunderstorm Warning	LBF	Cherry, Grant	24 min
Jul 31, 3:24 AM CDT	Special Weather Statement	LBF	Blaine, Logan, Loup, Rock, Thomas	51 min
Jul 31, 3:58 AM CDT	Special Weather Statement	LBF	Holt	47 min
Jul 31, 4:54 AM CDT	Special Weather Statement	LBF	Custer	51 min
Jul 31, 4:58 AM CDT	Special Weather Statement	LBF	Wheeler	62 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.