Alert archive / Nebraska / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 426, NWS North Platte, NE

September 8, 2005Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Sep 8, 2005, 5:19 PM MDT for Cherry County, Nebraska. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 8, 2005, 5:19 PM MDT (23:19 UTC)
Expired: Sep 8, 2005, 6:00 PM MDT
In force: 41 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

County Cherry County, NE

The radar

The North Platte radar (KLNX), 79 km from the middle of the area, began a volume at 23:23 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.3 hours before the alert went out and 163 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: 1210 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 1182 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 8, 1:47 PM MDT, 3 hours 32 minutes earlier.

Area forecast discussion, Sep 8, 1:47 PM MDT, 3 hours 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
247 PM CDT THU SEP 8 2005

.DISCUSSION...
PER SWOMCD...ISOLATED STORMS ARE EXPECTED TO CONTINUE FIRING THROUGH
EARLY EVENING ACROSS WESTERN NEBRASKA. EXPECT ACTIVITY WILL DISSIPATE
ACROSS NCNTL NEBRASKA THIS EVENING WITH THE LOSS OF DAYTIME HEATING.
SHEAR AND CAPE ARE WELL SUPPORTIVE FOR ISOLD SUPERCELL/SEVERE
POTENTIAL OF HAIL AND WINDS. ACTIVITY APPEARS TO BE PARTLY FORCED BY
THE WARM FRONT AND SOME UA DIVERGENCE WITH APPROACHING SHORT WAVE
EXITING THE COLO/WY ROCKIES. LAPS SUGGESTS CAP IS SUFFICIENTLY WEAK
ACROSS SOUTHWEST NEB WITH MLCAPE AOA 2500 SO ACTIVITY COULD SPREAD
EAST. 800MB THETA E...K INDEX AND 700MB OMEGA IN NAM ARE NULL THIS
AFTN SO FCST IS BASED ON OBSERVED ANALYSIS.

PRESUMABLY...AS SUGGESTED BY THE NAM...THE WARM FRONT WILL LIFT
NORTH OVERNIGHT WITH 850MB INCREASING TO OVER 40KTS. LOWER LEVELS
OF THE ATM ARE PROGGED TO DRY OUT AND STABILIZE FRIDAY AND SATURDAY.
WILL CONTINUE ISOLD TSRA FOR LATE FRI-SAT. THINGS GET A LITTLE MORE
INTERESTING SUNDAY AFTN/EVENING AS THE SFC LOW DROPS INTO WRN NEB.
800MB THETA E RIPENS AHEAD OF THE LOW. WILL CONTINUE ISOLD CHC
TSRA BUT UPGRADE TO CHC IS POSSIBLE WITH LATER FCSTS.

TEMPERATURES FCSTS ARE A BLEND OF 2M NAM...GUIDANCE AND NEIGHBORS.
NO CLEAR WINNER WAS OBVIOUS. WITH SLY WINDS...DEEP VERTICAL MIXING
AND HIGHS IN THE UPPER 90S APPEAR UNLIKELY AT THIS POINT. SO FCST
RUNS CLOSER TO GUIDANCE THAN THE WARMER 2M TEMPS. THE NAM ALSO
SUGGESTS STRONG 850MB WINDS AND DRYING WILL LIMIT FOG AND STRATUS
FORMATION.

MONDAY THROUGH THURSDAY...DGEX...GFS AND ECMWF SUGGEST FROPA LATE
MONDAY OR DURING THE DAY TUESDAY WITH GENERALLY COOLER TEMPERATURES
THEREAFTER. MODELS ALL AGREE...DEEP WRN TROF DROPS SWD. NONE OF THE
MODELS IS SUGGESTING SIGNIFICANT PCPN WILL OCCUR SO THE FCST IS DRY.
ULTIMATELY THIS PATTERN WILL LEAD TO ORGANIZED RAINFALL BUT NOT SO
FAST.

&&

LBF WATCHES/WARNINGS/ADVISORIES...NONE.

&&

CDC

Hazardous weather outlook, Sep 8, 2:37 PM MDT, 2 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
337 PM CDT THU SEP 8 2005

NEZ004>010-022>029-035>038-056>059-069>071-094-092045-
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-
337 PM CDT THU SEP 8 2005 /237 PM MDT THU SEP 8 2005/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN AND
NORTH CENTRAL NEBRASKA.

.DAY ONE...TONIGHT.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE THIS EVENING WEST OF A
OGALLALA TO VALENTINE LINE. IN GENERAL THE THUNDERSTORMS WILL
PRODUCE BRIEF HEAVY RAIN AND SMALL HAIL...HOWEVER A SEVERE
THUNDERSTORM WITH LARGE HAIL CAN NOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

FRIDAY THROUGH MONDAY ISOLATED THUNDERSTORMS WILL CONTINUE TO BE
POSSIBLE...ESPECIALLY ACROSS WESTERN NEBRASKA...DURING THE LATE
AFTERNOON AND EVENING HOURS. AT THIS TIME...NO SEVERE WEATHER IS
EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

&&

THIS PRODUCT IS NOW AVAILABLE...ALONG WITH OTHER WEATHER...
HYDROLOGICAL AND CLIMATOLOGICAL INFORMATION...AT
HTTP://WWW.WEATHER.GOV/NORTHPLATTE (ALL LOWERCASE)

MASEK

In the hours before

Local storm report, Sep 8, 4:45 PM MDT, 34 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 4:34 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	41 min
Sep 8, 4:51 PM MDT	Tornado Warning	LBF	Cherry	24 min
Sep 8, 5:32 PM MDT	Tornado Warning	LBF	Cherry, Grant	43 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2005 Every severe thunderstorm warning in 2005

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.