Alert archive / Nebraska / Special Weather Statements in 2012
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jul 29, 2012, 4:02 PM MDT for Scotts Bluff County, Nebraska. It was in force for 58 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 29, 2012, 4:02 PM MDT (22:02 UTC)
- Expired
- Jul 29, 2012, 5:00 PM MDT
- In force
- 58 min
- Issued by
- NWS Cheyenne, WY
County Scotts Bluff County, NE
The radar
The Cheyenne radar (KCYS), 132 km from the middle of the area, began a volume at 22:04 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 (KDNR), launched 12:00Z, 10.0 hours before the alert went out and 220 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
- 2391 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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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 Cheyenne, WY wrote its last area forecast discussion before this special weather statement went out at Jul 29, 3:49 PM MDT, 13 minutes earlier.
Area forecast discussion, Jul 29, 3:49 PM MDT, 13 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 349 PM MDT SUN JUL 29 2012 .SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT... SHOWERS AND THUNDERSTORMS WERE OVER MUCH OF SOUTHEAST WYOMING AND THE NORTHERN NEBRASKA PANHANDLE EARLY THIS AFTERNOON. THE ACTIVITY WILL CONTINUE TO INCREASE AND SPREAD OVER THE SOUTHERN PANHANDLE LATE THIS AFTERNOON. PRECIPITABLE WATER VALUES WILL BE WELL OVER 100 PERCENT THROUGH EARLY TONIGHT AND LIKELY MONDAY AS THE MID AND UPPER LEVEL MOISTURE PLUME REMAINS OVER THE CWA. SIMILAR TO THE PAST FEW DAYS...MANY OF THE STORMS WILL PRODUCE BRIEF WIND GUSTS AS HIGH AS 50 MPH AND A PERIOD OF HEAVY RAIN. PATTERN WILL REMAIN SIMILAR THROUGH 12Z WEDNESDAY. THE LARGE AREA OF HIGH PRESSURE WILL REMAIN CENTERED OVER THE OKLAHOMA ASN TEXAS PANHANDLE THROUGH THAT TIME...WITH A SURFACE TROUGH OVER EASTERN WYOMING. THE MID AND UPPER LEVEL MOISTURE PLUME CURRENTLY OVER THE CWA WILL PERSIST THROUGH MONDAY...BUT WILL BE NARROWED AS DRIER AIR IS MOVING NORTH FROM NEW MEXICO EARLY THIS AFTERNOON. THE MOISTURE PLUME WILL BECOME LESS DEFINED BY TUESDAY AS THAT DRIER AIR TRIES TO MOVE INTO THE CWA. PRECIPITABLE WATER VALUES WITHIN THE PLUME WILL BE ABOVE AN INCH EAST OF THE LARAMIE RANGE THROUGH MONDAY EVENING AND THEN DECREASE SOME. THE RESULT WILL BE FAIRLY WIDESPREAD AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH MONDAY EVENING WITH PERHAPS SLIGHTLY LESS COVERAGE FOR TUESDAY. THE ACTIVITY WILL SLOWLY DECREASE IN COVERAGE AND INTENSITY EACH NIGHT WITH SOME SPRINKLES LINGERING AFTER MIDNIGHT. OTHERWISE...THE STORMS WILL AGAIN PRODUCE BRIEF WIND GUSTS AS HIGH AS 50 MPH AND A PERIOD OF HEAVY RAIN MONDAY AFTERNOON AND EVENING AND POSSIBLY TUESDAY AFTERNOON AND EVENING. TEMPERATURES WILL REMAIN VERY WARMOVER THE CWA THROUGH TUESDAY NIGHT...BUT DAYTIME HIGHS WILL BE MODERATED SOME BY THE EXPECTED CLOUD COVER. .LONG TERM...WEDNESDAY THROUGH SUNDAY... NO SIGNIFICANT CHANGES WERE REQUIRED TO THE EXTENDED FORECAST THIS PERIOD. THE FORECAST AREA SHOULD REMAIN ON THE NORTHERN FRINGE OF A BROAD AND FLAT UPPER-LEVEL RIDGE ENCOMPASSING MUCH OF THE WESTERN AND CENTRAL CONUS. MEDIUM RANGE MODEL GUIDANCE IS IN REASONABLE AGREEMENT WITH WEAK SHORTWAVE ENERGY TRAVERSING THE FLOW ALONG THE EDGE OF THE RIDGE THROUGH THE LATTER HALF OF THE WEEK. SHOWERS AND TSTMS WILL BE POSSIBLE OVER THE MOUNTAINS EACH DAY...WITH CHANCES DECREASING TOWARD THE END OF THE WEEK AS MONSOONAL MOISTURE IS SUPRESSED SOUTHWARD AHEAD OF AN UPPER-LEVEL TROUGH DIGGING SOUTHEAST INTO THE NORTHERN HIGH PLAINS. SIGNIFICANT DRY AIR IN THE H7-H3 LAYER SHOULD PRECLUDE ANY NOTABLE CHANCES FOR PCPN. HOT CONDITIONS WILL PERSIST OVER THE WESTERN NE PANHANDLE AND HIGH PLAINS OF SOUTHEAST WY THROUGH FRI WITH 1000-500H THICKNESS VALUES WELL IN EXCESS OF 580 DM. THE AFORMENTIONED UPPER-LEVEL TROUGH IS EXPECTED TO DRIVE A WEAK CANADIAN COOL FRONT ACROSS THE AREA ON FRI NIGHT AND EARLY SAT...WITH H7 TEMPERATURES FALLING INTO THE 12 TO 14C RANGE IN ITS WAKE AND YIELDING SOME MODEST RELIEF FROM 90 TO 100 DEGREE HEAT. MODELS DIVERGE SOMEWHAT TOWARD THE END OF THE PERIOD WITH THE ECMWF SHOWING A SUBSTANTIAL/HIGHLY AMPLIFIED RIDGE ON SUN-MON. THE GFS IS INDICATIVE OF RIDGING AS WELL...BUT NOT NEARLY AS SIGNIFICANT. HAVE TRENDED WARMER FOR SUN AS A RESULT...WITH UPPER 90S LIKELY RETURNING TO THE PANHANDLE. && .AVIATION...18Z TAF ISSUANCE... VFR CONDITIONS CAN BE EXPECTED AT ALL TERMINALS ACROSS SOUTHEAST WY AND THE WESTERN NE PANHANDLE THROUGH THE FCST PERIOD WITH A PERSISTENT DECK OF SCT-TO-BKN MID LEVEL CLOUDS. SHOWERS AND TSTMS WILL INCREASE IN COVERAGE/INTENSITY THROUGH THE AFTN AND EARLY EVE AS AN UPPER LEVEL DISTURBANCE APPROACHES THE REGION. THE GREATEST COVERAGE OF PCPN CAN BE EXPECTED OVER THE SNOWY AND SIERRA MADRE MOUNTAIN RANGES...AND ADJACENT HIGH PLAINS INCLUDING THE KLAR/KCYS/KBFF TERMINALS. MARGINAL INSTABILITY ATOP WARM AND DRY SURFACE CONDITIONS WILL ONCE AGAIN CREATE A FAVORABLE ENVIRONMENT FOR GUSTY AND ERRATIC OUTFLOW WINDS WITH THE STRONGEST SHOWERS AND STORMS...AS WELL AS LOCALLY HEAVY RAINFALL AS SUBTROPICAL MOISTURE INCREASES IN THE MID AND UPPER LEVELS. BRIEF MVFR CIGS OR VSBYS CANNOT BE RULED OUT BENEATH SOME OF THIS ACTIVITY...MAINLY BETWEEN 20Z THIS AFTN AND 02Z THIS EVE. ACTIVITY WILL BEGIN TO DECREASE DURING THE LATE EVE AND OVERNIGHT HOURS...BUT ISOLATED TO WIDELY SCATTERED LIGHT RAIN SHOWERS MAY PERSIST THROUGH THE NIGHT. SHOWERS SHOULD ONCE AGAIN DEVELOP BY LATE MON MORNING. && .FIRE WEATHER... SHOWERS AND MAINLY LATE DAY THUNDERSTORMS WILL CONTINUE OVER MUCH OF THE CWA THROUGH TUESDAY. WETTING RAINFALL IS LIKELY WITH THE ACTIVITY THROUGH THAT TIME ALONG WITH BRIEF GUSTS AS HIGH AS 50 MPH ASSOCIATED WITH THE STORMS. LIGHTNING AND THE ERRACTIC WIND GUSTS FROM THE STORMS WILL BE THE MAIN FIRE WEATHER CONCERNS FOR EARLY THIS WEEK. DAYTIME TEMPERATURES WILL REMAIN VERY WARM DURING THAT TIME AND MINIMUM RELATIVE VALUES WILL BE BETWEEN 15 AND 25 PERCENT OVER THE LOWER ELEVATIONS. DRIER AIR WILL BE OVER THE CWA WEDNESDAY AND THURSDAY FOR MUCH LESS NUMEROUS SHOWERS AND STORMS AS WELL AS LOWER MINIMUM RELATIVE HUMIDITY VALUES. EASTERLY WINDS WILL GUST AS HIGH AS 25 MPH THROUGH EARLY THIS EVENING OVER THE NEBRASKA PANHANDLE. OTHERWISE...WIDNS WILL BE FAIRLY LIGHT THROUGH MID WEEK OUTSIDE OF ANY THUNDERSTORMS. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && WEILAND/HAMMER
Hazardous weather outlook, Jul 29, 10:05 AM MDT, 5 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1005 AM MDT SUN JUL 29 2012 WYZ101>119-301045- 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- 1005 AM MDT SUN JUL 29 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP OVER THE MOUNTAINS IN THE EARLY AFTERNOON AND THEN MOVE SLOWLY TO THE NORTHEAST. THE STORMS WILL PRODUCE BRIEF WIND GUSTS AS HIGH AS 50 MPH AND A PERIOD OF HEAVY RAINFALL. THUNDERSTORMS WILL CONTINUE THROUGH EARLY TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS SOUTHEAST WYOMING MONDAY AND TUESDAY AFTERNOON AND EVENING. SEVERE THUNDERSTORMS ARE NOT EXPECTED...BUT GUSTY WINDS WILL BE POSSIBLE WITH SOME THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-301045- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 1005 AM MDT SUN JUL 29 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL MOVE OVER THE WESTERN NEBRASKA PANHANDLE IN THE MID TO LATE AFTERNOON HOURS AND CONTINUE THROUGH EARLY TONIGHT. THE STORMS WILL MOVE SLOWLY TO THE EAST AND WILL PRODUCE BRIEF WIND GUSTS AS HIGH AS 50 MPH AS WELL AS A PERIOD OF HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS WESTERN NEBRASKA MONDAY AND TUESDAY. SEVERE THUNDERSTORMS ARE NOT EXPECTED...BUT GUSTY WINDS WILL BE POSSIBLE WITH SOME THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WEILAND
In the hours before
Special weather statement, Jul 29, 3:36 PM MDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
336 PM MDT SUN JUL 29 2012
NEZ054-292200-
KIMBALL NE-
336 PM MDT SUN JUL 29 2012
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN KIMBALL COUNTY UNTIL 400
PM MDT...
AT 332 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 13 MILES SOUTH OF KIMBALL AIRPORT...OR 16 MILES
SOUTH OF KIMBALL...MOVING EAST AT 10 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
MAINLY RURAL AREAS OF EXTREME SOUTHERN KIMBALL COUNTY.
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
&&
LAT...LON 4100 10376 4107 10377 4115 10347 4100 10347
4099 10356 4099 10375
TIME...MOT...LOC 2136Z 261DEG 9KT 4101 10370
MAZURSpecial weather statement, Jul 29, 3:46 PM MDT, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 346 PM MDT SUN JUL 29 2012 NEZ020-054-055-292215- BANNER NE-CHEYENNE NE-KIMBALL NE- 346 PM MDT SUN JUL 29 2012 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN KIMBALL...EXTREME NORTHWESTERN CHEYENNE AND SOUTHEASTERN BANNER COUNTIES UNTIL 415 PM MDT... AT 342 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING AN AREA OF STRONG THUNDERSTORMS NEAR KIMBALL MOVING NORTHEAST AT 15 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... KIMBALL... DIX... RURAL PORTIONS OF NORTHEAST KIMBALL COUNTY... THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 15 AND 35. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4153 10338 4115 10337 4108 10370 4132 10387 TIME...MOT...LOC 2145Z 243DEG 14KT 4116 10361 MAZUR
Special weather statement, Jul 29, 4:02 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 402 PM MDT SUN JUL 29 2012 NEZ019>021-096-292300- BANNER NE-MORRILL NE-SCOTTS BLUFF NE-SOUTH SIOUX NE- 402 PM MDT SUN JUL 29 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SIOUX...EASTERN SCOTTS BLUFF...WESTERN MORRILL AND NORTHEASTERN BANNER COUNTIES UNTIL 500 PM MDT... AT 400 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SCOTTS BLUFF NATIONAL MONUMENT TO 11 MILES SOUTHEAST OF WILDCAT HILLS STATE RECREATION AREA...AND MOVING EAST AT 15 MPH. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... SCOTTSBLUFF... GERING... LAKE ALICE... MINATARE... REDINGTON... CHIMNEY ROCK STATE PARK... LAKE MINATARE... BAYARD... MOOMAWS CORNER... MELBETA... MCGREW... TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4210 10346 4160 10314 4151 10361 4189 10387 TIME...MOT...LOC 2202Z 252DEG 12KT 4189 10373 4159 10352 MAZUR
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:58 PM MDT | Special Weather Statement | CYS | Carbon | 62 min |
| Jul 29, 3:36 PM MDT | Special Weather Statement | CYS | Kimball | 24 min |
| Jul 29, 3:46 PM MDT | Special Weather Statement | CYS | Kimball | 29 min |
| Jul 29, 4:12 PM MDT | Special Weather Statement | CYS | Cheyenne | 48 min |
| Jul 29, 4:56 PM MDT | Special Weather Statement | CYS | Morrill | 49 min |
Nearby
Special Weather Statements in Nebraska, 2012Every special weather statement in 2012
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.