Alert archive / Nebraska / Special Weather Statements in 2014

Special Weather Statement, NWS Cheyenne, WY

July 4, 2014Morrill County, Nebraska

NWS Cheyenne, WY issued this special weather statement at Jul 4, 2014, 2:39 PM MDT for Morrill County, Nebraska. It was in force for 66 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, 2014, 2:39 PM MDT (20:39 UTC)
Expired: Jul 4, 2014, 3:45 PM MDT
In force: 66 min
Issued by: NWS Cheyenne, WY

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 172 km from the middle of the area, began a volume at 20:42 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, 8.7 hours before the alert went out and 230 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: 4 J/kg
Mixed-layer CIN: -445 J/kg
Mixed-layer LCL: 2844 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Cheyenne, WY wrote its last area forecast discussion before this special weather statement went out at Jul 4, 2:05 PM MDT, 34 minutes earlier.

Area forecast discussion, Jul 4, 2:05 PM MDT, 34 minutes before

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Hazardous weather outlook, Jul 4, 12:18 PM MDT, 2 hours 21 minutes before

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In the hours before

Special weather statement, Jul 4, 2:34 PM MDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
234 PM MDT FRI JUL 4 2014

NEZ054-055-042130-
CHEYENNE NE-KIMBALL NE-
234 PM MDT FRI JUL 4 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KIMBALL AND
SOUTHWESTERN CHEYENNE COUNTIES UNTIL 330 PM MDT...

AT 231 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES SOUTHEAST OF
POTTER TO 13 MILES SOUTHEAST OF KIMBALL AIRPORT...AND MOVING EAST AT
20 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS.

THESE STORMS WILL BE NEAR...
LORENZO AROUND 315 PM MDT.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

&&

LAT...LON 4102 10361 4117 10327 4101 10270 4099 10277
      4099 10349 4099 10352
TIME...MOT...LOC 2034Z 292DEG 16KT 4110 10323 4103 10352

RUBIN

Special weather statement, Jul 4, 2:39 PM MDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
239 PM MDT FRI JUL 4 2014

NEZ003-021-042145-
BOX BUTTE NE-MORRILL NE-
239 PM MDT FRI JUL 4 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MORRILL AND EXTREME
SOUTHEASTERN BOX BUTTE COUNTIES UNTIL 345 PM MDT...

AT 237 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR ANGORA...OR 17 MILES SOUTHWEST OF
ALLIANCE...MOVING SOUTHEAST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.

THIS STORM WILL BE NEAR...
ANGORA AROUND 300 PM MDT.

WHEN THUNDER ROARS...MOVE INDOORS.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

&&

LAT...LON 4200 10285 4176 10306 4192 10319 4199 10313
TIME...MOT...LOC 2040Z 300DEG 7KT 4193 10311

RUBIN

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 6:18 PM MDT	Special Weather Statement	CYS	Albany	42 min
Jul 3, 6:38 PM MDT	Special Weather Statement	CYS	Laramie	52 min
Jul 3, 6:43 PM MDT	Special Weather Statement	CYS	Laramie	47 min
Jul 3, 7:43 PM MDT	Special Weather Statement	CYS	Albany	62 min
Jul 3, 7:47 PM MDT	Special Weather Statement	CYS	Platte	43 min
Jul 3, 7:59 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	61 min
Jul 3, 8:27 PM MDT	Special Weather Statement	CYS	Platte	48 min
Jul 3, 9:41 PM MDT	Special Weather Statement	CYS	Platte	49 min
Jul 3, 10:35 PM MDT	Special Weather Statement	CYS	Converse	25 min
Jul 3, 10:38 PM MDT	Special Weather Statement	CYS	Converse	37 min
Jul 4, 2:34 PM MDT	Special Weather Statement	CYS	Cheyenne	56 min
Jul 4, 3:04 PM MDT	Special Weather Statement	CYS	Cheyenne	26 min

Nearby

Special Weather Statements in Nebraska, 2014 Every special weather statement in 2014

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.