Alert archive / Wyoming / Special Weather Statements in 2014

Special Weather Statement, NWS Cheyenne, WY

July 15, 2014

NWS Cheyenne, WY issued this special weather statement at Jul 15, 2014, 3:51 PM MDT. 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 15, 2014, 3:51 PM MDT (21:51 UTC)
Expired: Jul 15, 2014, 4:30 PM MDT
In force: 39 min
Issued by: NWS Cheyenne, WY

The radar

The Cheyenne radar (KCYS), 195 km from the middle of the area, began a volume at 21:52 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

Riverton, WY (KRIW), launched 12:00Z, 9.9 hours before the alert went out and 244 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: 1771 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 102 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 15, 11:47 AM MDT, 4 hours 4 minutes earlier.

Area forecast discussion, Jul 15, 11:47 AM MDT, 4 hours 4 minutes before

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Hazardous weather outlook, Jul 15, 11:27 AM MDT, 4 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1127 AM MDT TUE JUL 15 2014

WYZ101>119-161115-
CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY-
NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS-
SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY-
NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY-
SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-
LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS-
CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY-
1127 AM MDT TUE JUL 15 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP BY THE MIDDLE OF
THIS AFTERNOON ACROSS THE MOUNTAINS OF SOUTHEAST WYOMING. SHOWERS
AND THUNDERSTORMS WILL BECOME MORE NUMEROUS BY THIS EVENING AS THEY
MOVE INTO THE HIGH PLAINS. SOME OF THESE THUNDERSTORMS MAY  BECOME
SEVERE WITH LARGE HAIL...FREQUENT LIGHTNING...AND DAMAGING WINDS THE
MAIN THREAT. HEAVY RAINFALL IS ALSO POSSIBLE WITH A RISK FOR FLASH
FLOODING THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH WEDNESDAY AND
WEDNESDAY NIGHT BEFORE SOME DRIER AIR BEGINS TO MOVE INTO THE
REGION BY LATE THIS WEEK. THUNDERSTORM CHANCES WILL DECREASE
SIGNIFICANTLY FOR FRIDAY AND THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE URGED TO REPORT SEVERE WEATHER LATE THIS AFTERNOON
THROUGH THIS EVENING.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

NEZ002-003-019>021-054-055-095-096-161115-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-
1127 AM MDT TUE JUL 15 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA
PANHANDLE.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE BY THIS
EVENING...WITH NUMEROUS SHOWERS AND THUNDERSTORMS EXPECTED THROUGH
TONIGHT. A FEW THUNDERSTORMS MAY BECOME SEVERE WITH LARGE HAIL AND
DAMAGING WINDS POSSIBLE. LOCALLY HEAVY RAINFALL IS ALSO EXPECTED
TONIGHT WITH A RISK FOR FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH WEDNESDAY AND
WEDNESDAY NIGHT BEFORE SOME DRIER AIR BEGINS TO MOVE INTO THE
REGION BY LATE THIS WEEK. THUNDERSTORM CHANCES WILL DECREASE
SIGNIFICANTLY FOR FRIDAY AND THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE URGED TO REPORT SEVERE WEATHER THIS EVENING.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

In the hours before

Special weather statement, Jul 15, 2:25 PM MDT, 1 hour 26 minutes before

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Special weather statement, Jul 15, 2:39 PM MDT, 1 hour 12 minutes before

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Special weather statement, Jul 15, 3:05 PM MDT, 46 minutes before

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Special weather statement, Jul 15, 3:34 PM MDT, 17 minutes before

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Special weather statement, Jul 15, 3:51 PM MDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:58 PM MDT	Special Weather Statement	CYS	Carbon	62 min
Jul 14, 7:09 PM MDT	Special Weather Statement	CYS	Laramie	51 min
Jul 15, 2:39 PM MDT	Special Weather Statement	CYS	Laramie	51 min
Jul 15, 3:05 PM MDT	Special Weather Statement	CYS	Laramie	40 min
Jul 15, 3:34 PM MDT	Special Weather Statement	CYS		56 min
Jul 15, 4:25 PM MDT	Special Weather Statement	CYS	Carbon	50 min
Jul 15, 4:46 PM MDT	Special Weather Statement	CYS	Converse	44 min
Jul 15, 5:09 PM MDT	Special Weather Statement	CYS		51 min
Jul 15, 5:15 PM MDT	Special Weather Statement	CYS	Albany	45 min
Jul 15, 5:33 PM MDT	Special Weather Statement	CYS	Converse	42 min
Jul 15, 5:44 PM MDT	Special Weather Statement	CYS	Albany	46 min
Jul 15, 5:49 PM MDT	Special Weather Statement	CYS		41 min
Jul 15, 5:55 PM MDT	Special Weather Statement	CYS	Converse	50 min

Nearby

Special Weather Statements in Wyoming, 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.