Alert archive / Nebraska / Special Weather Statements in 2015
Special Weather Statement, NWS North Platte, NE
NWS North Platte, NE issued this special weather statement at Aug 4, 2015, 9:54 AM MDT for Keith County, Nebraska. It was in force for 51 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
- Aug 4, 2015, 9:54 AM MDT (15:54 UTC)
- Expired
- Aug 4, 2015, 10:45 AM MDT
- In force
- 51 min
- Issued by
- NWS North Platte, NE
County Keith County, NE
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 3.9 hours before the alert went out and 56 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
- 983 J/kg
- Mixed-layer CIN
- -213 J/kg
- Mixed-layer LCL
- 899 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</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 North Platte, NE wrote its last area forecast discussion before this special weather statement went out at Aug 4, 5:41 AM MDT, 4 hours 13 minutes earlier.
Area forecast discussion, Aug 4, 5:41 AM MDT, 4 hours 13 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 641 AM CDT TUE AUG 4 2015 .SYNOPSIS... ISSUED AT 348 AM CDT TUE AUG 4 2015 LARGE UPPER LOWS OVER BRITISH COLUMBIA AND HUDSON BAY WITH RIDGE THROUGH NORTHERN ROCKIES INTO CANADA. VERY PRONOUNCED NEGATIVELY TILTED UPPER WAVE MOVING ACROSS WESTERN WYOMING AS SEEN IN IR... MOVING UNDER THE RIDGE. BROAD TROUGH OVER THE EASTERN CONUS FROM HUDSON BAY LOW INTO THE SOUTHEAST CONUS. && .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 348 AM CDT TUE AUG 4 2015 MAIN PLAYER TODAY WILL BE UPPER LEVEL WAVE OVER WYOMING AND COLORADO. ONGOING CONVECTION OVER NORTH CENTRAL ZONES WILL CONTINUE THROUGH THE DAY TODAY. AS THE UPPER LOW CONTINUES TO MOVE SLOWLY EAST NORTHEAST TODAY CONVECTION WILL BEGIN OVER SOUTHWEST NEBRASKA AND THE SOUTHEAST NEBRASKA PANHANDLE ALONG STATIONARY BOUNDARY. PWATS ABOVE AN INCH OVER THE CENTRAL AND NORTHERN PLAINS ABOUT 125% OF NORMAL. AS LOW MOVES CLOSER AND HEATING OF THE DAY. FAVORABLE WIND PROFILES FOR DEVELOPMENT OF ORGANIZED CONVECTION ALONG THE STATIONARY FRONT LATE MORNING EARLY AFTERNOON. SYSTEM CLOSES OFF AND NEGATIVE TILT OF SYSTEM WILL BRING PROLONGED SLOW MOVING SYSTEM. HIGHS TODAY IN THE MID 80S. ONGOING PRECIPITATION OVER THE EAST TONIGHT WITH TEMPERATURES FALLING INTO THE UPPER 50S WEST AND LOWER 60S EAST. .LONG TERM...(WEDNESDAY THROUGH MONDAY) ISSUED AT 348 AM CDT TUE AUG 4 2015 SHORTWAVE RIDGING ALOFT WILL OVERSPREAD THE REGION WEDNESDAY IN THE WAKE OF TUESDAY/TUESDAY NIGHTS UPPER LEVEL DISTURBANCE. WITH THE RISING HEIGHTS ALOFT AND LITTLE FOCUS FOR CONVECTION AT THE SURFACE...WILL GO WITH A DRY DAY AFTER ANY EARLY MORNING LINGERING SHOWERS/TSTMS FROM DEPARTING UPPER LEVEL DISTURBANCE. WEDNESDAY NIGHT INTO THURSDAY...THE NEXT WAVE ALOFT MOVES ACROSS THE DAKOTAS. APPEARS TO BE JUST ENOUGH UPPER LEVEL FORCING ASSOCIATED WITH THE WAVE TO CONTINUE THE MENTION OF A FEW TSTMS ACROSS NORTH CENTRAL NEBRASKA WEDNESDAY NIGHT. THE UPPER WAVE WILL DRIVE A COLD FRONT SOUTHEAST THROUGH THE AREA THURSDAY. THE GFS AND NAM ARE IN GOOD AGREEMENT AND HAVE THE FRONT FROM ALONG A LINE FROM ROUGHLY EWING TO BURWELL TO BROKEN BOW BY AROUND 4PM OR PEAK HEATING. VERY UNSTABLE AHEAD OF THE BOUNDARY WITH SFC BASED CAPE NEAR 4500 J/KG AND 30 TO 40 KTS OF 0 TO 6 KM BULK SHEAR. IF STORMS DEVELOP SEVERE WILL BE QUITE POSSIBLE. IT DOES APPEAR STORMS WILL DEVELOP AS TEMPERATURES COOL ALOFT DURING THE AFTERNOON AND FORCING INCREASES. FRIDAY INTO THE WEEKEND...OVERALL UPPER PATTERN REMAINS LARGELY UNCHANGED WITH UPPER LEVEL HIGH TO REMAIN ANCHORED ACROSS THE SOUTHERN PLAINS. SEVERAL DISTURBANCES ALOFT WILL ROTATE EAST ACROSS THE REGION ON THE NORTHERN PERIPHERY OF THE RIDGE...WITH ISOLATED TO SCATTERED MAINLY AFTERNOON AND NIGHTIME TSTMS. TEMPERATURES WILL CONTINUE TO AVERAGE NEAR NORMAL WITH HIGHS MID TO UPPER 80S AND LOWS IN THE 60S. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z WEDNESDAY MORNING) ISSUED AT 642 AM CDT TUE AUG 4 2015 A LINE OF THUNDERSTORMS WILL CONTINUE OVER NORTH CENTRAL NEBRASKA FROM KVTN TO KONL THROUGH THE MORNING. OVER THE REMAINDER OF WESTERN NEBRASKA MVFR TO LIFR CONDITIONS ARE PRESENT WITH STRATUS AND FOG. AREAS OF STRATUS SHOULD CONTINUE TO LIFT THROUGH THE MORNING INTO MVFR CEILINGS. THUNDERSTORMS WILL DEVELOP OVER SOUTHWEST NEBRASKA THIS AFTERNOON AND CONTINUE THROUGH THE EARLY EVENING. SOME OF THESE STORMS COULD BE SEVERE WITH LARGE HAIL AND DAMAGING THUNDERSTORM WINDS. HAVE CARRIED THUNDERSTORMS IN VCNTY AT KVTN WITH UNCERTAINTY. HAVE CARRIED AT KLBF THROUGH THE LATE AFTERNOON WITH VCTS AFTER 05/00Z. && .LBF WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...POWER SHORT TERM...POWER LONG TERM...TAYLOR AVIATION...POWER
Hazardous weather outlook, Aug 4, 9:24 AM MDT, 30 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NORTH PLATTE NE 1024 AM CDT TUE AUG 4 2015 NEZ004>010-022>029-035>038-056>059-069>071-094-051530- SHERIDAN-EASTERN CHERRY-KEYA PAHA-BOYD-BROWN-ROCK-HOLT-GARDEN- GRANT-HOOKER-THOMAS-BLAINE-LOUP-GARFIELD-WHEELER-ARTHUR-MCPHERSON- LOGAN-CUSTER-DEUEL-KEITH-PERKINS-LINCOLN-CHASE-HAYES-FRONTIER- WESTERN CHERRY- 1024 AM CDT TUE AUG 4 2015 /924 AM MDT TUE AUG 4 2015/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN AND NORTH CENTRAL NEBRASKA. .DAY ONE...TODAY AND TONIGHT. SCATTERED TO WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE SANDHILLS REGION TODAY...CAPABLE OF FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL. SOME OF THE STORMS MAY BECOME STRONG TO SEVERE DURING THE AFTERNOON AND EVENING HOURS. THE BEST CHANCES FOR SEVERE WEATHER WILL GENERALLY EXIST ALONG AND SOUTH OF A HYANNIS TO BROKEN BOW LINE...INCLUDING MUCH OF THE CENTRAL SANDHILLS AND INTO SOUTHWEST NEBRASKA. THE PRIMARY THREAT WITH ANY SEVERE WILL BE LARGE HAIL AND DAMAGING WINDS...HOWEVER A TORNADO OR TWO CANNOT BE RULED OUT. THE SEVERE THREAT DIMINISHES TONIGHT...BUT THE CHANCES FOR SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO EARLY WEDNESDAY MORNING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. THUNDERSTORMS ARE POSSIBLE EACH DAY WEDNESDAY THROUGH SUNDAY AS AN ACTIVE PATTERN CONTINUES ACROSS WESTERN AND NORTH CENTRAL NEBRASKA. AT THIS TIME...THE THREAT FOR SEVERE STORMS IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED OVER SOUTHWEST NEBRASKA THIS AFTERNOON AND EVENING. && GET YOUR WEATHER...HYDROLOGICAL...AND CLIMATE INFORMATION AT HTTP://WWW.WEATHER.GOV/NORTHPLATTE (ALL LOWERCASE) MARTIN
In the hours before
Special weather statement, Aug 4, 9:54 AM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORTH PLATTE NE 1054 AM CDT TUE AUG 4 2015 NEZ057>059-041645- KEITH NE-PERKINS NE-LINCOLN NE- 1054 AM CDT TUE AUG 4 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KEITH...WEST CENTRAL LINCOLN AND NORTHEASTERN PERKINS COUNTIES UNTIL 1145 AM CDT/1045 AM MDT/... AT 1053 AM CDT /953 AM MDT/...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR PAXTON...OR 22 MILES EAST OF OGALLALA...MOVING NORTHEAST AT 15 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... PAXTON...SUTHERLAND...SARBEN...SUTHERLAND RESERVOIR STATE RECREATION AREA...COKER...O'FALLONS AND HERSHEY. THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 142 AND 162. LAT...LON 4093 10124 4102 10145 4130 10138 4118 10099 TIME...MOT...LOC 1553Z 208DEG 11KT 4104 10131 JWS
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 10:37 PM MDT | Special Weather Statement | LBF | Keya Paha | 38 min |
| Aug 3, 11:54 PM MDT | Special Weather Statement | LBF | Keya Paha, Rock | 66 min |
| Aug 4, 1:44 AM MDT | Special Weather Statement | LBF | Boyd, Holt, Keya Paha, Rock | 46 min |
| Aug 4, 2:39 AM MDT | Special Weather Statement | LBF | Boyd, Holt, Keya Paha, Rock | 96 min |
| Aug 4, 10:21 AM MDT | Special Weather Statement | LBF | Deuel | 39 min |
| Aug 4, 11:30 AM MDT | Special Weather Statement | LBF | Chase, Perkins | 45 min |
| Aug 4, 11:33 AM MDT | Special Weather Statement | LBF | Lincoln | 42 min |
| Aug 4, 11:41 AM MDT | Severe Thunderstorm Warning | LBF | Chase | 34 min |
| Aug 4, 12:01 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 29 min |
| Aug 4, 12:30 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 45 min |
| Aug 4, 1:18 PM MDT | Areal Flood Advisory | LBF | Lincoln | 3 hr |
| Aug 4, 1:31 PM MDT | Areal Flood Advisory | LBF | Frontier, Hayes | 3 hr |
| Aug 4, 1:57 PM MDT | Areal Flood Advisory | LBF | Lincoln | 3 hr |
| Aug 4, 2:03 PM MDT | Special Weather Statement | LBF | Frontier | 42 min |
Nearby
Special Weather Statements in Nebraska, 2015Every special weather statement in 2015
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.