Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 91, NWS Hastings, NE

June 17, 2009York County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jun 17, 2009, 10:01 PM CDT for York County, Nebraska. It was in force for 44 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: Jun 17, 2009, 10:01 PM CDT (03:01 UTC)
Expired: Jun 17, 2009, 10:45 PM CDT
In force: 44 min
Issued by: NWS Hastings, NE
Area: Storm-based polygon

County York County, NE

The radar

The Grand Island radar (KUEX), 94 km from the middle of the area, began a volume at 03:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 17, 9:04 PM CDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.0 hours before the alert went out and 114 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: 1256 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 1892 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 6:16 PM CDT, 3 hours 45 minutes earlier.

Area forecast discussion, Jun 17, 6:16 PM CDT, 3 hours 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
616 PM CDT WED JUN 17 2009

.AVIATION...00Z TAF. THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS
EVENING AND RAPIDLY BECOME SEVERE. THE POTENTIAL FOR A SEVERE
STORM TO IMPACT KGRI DOES EXIST. THUNDERSTORM CHCS DECREASE IN THE
PREDAWN HOURS. ONCE THE STORMS PASS THROUGH...VFR CONDITIONS ARE
EXPECTED ON THURSDAY.

&&

.PREV DISCUSSION... /ISSUED 241 PM CDT WED JUN 17 2009/

SHORT TERM...TONIGHT THROUGH THURSDAY NIGHT.  FOCUS IS ON SEVERE
WEATHER TONIGHT.  SURFACE WARM FRONTAL BOUNDARY WAS ORIENTED NEAR
THE NEBRASKA AND KANSAS STATELINE.  SEVERE PARAMETERS ALL ARE
FAVORABLE FOR ORGANIZED STORMS THIS AFTERNOON AND EVENING.  CAP HAS
ESSENTIALLY ERODED ALONG THE FRONT AND LAPS DATA INDICATE SURFACE
BASED CAPES ON THE ORDER OF 4500 J/KG.  DEEP LAYER SHEAR IS ALSO
IMPRESSIVE AT 40 TO 50KTS.  MOISTURE HAS POOLED ALONG THE BOUNDARY
WITH DPS IN THE LOW TO MID 70S...LEADING TO AN AXIS OF LOWER LCL
HEIGHTS.

THE FRONTAL BOUNDARY WILL BE THE FOCUS FOR CONVECTION DURING THE
NEXT SEVERAL HOURS.  STORMS WILL RAPIDLY BECOME SEVERE AND BE
CAPABLE OF PRODUCING BASEBALL HAIL...DAMAGING WINDS...TORNADOES AND
HEAVY RAINFALL IN EXCESS OF TWO INCHES.  MODELS ARE FAIRLY AGREEABLE
THAT THE EASTERN NEB CONVECTION WILL CONTINUE TO TREK
EASTWARD...WITH A NEW ROUND OF STORMS DEVELOPING ROUGHLY 22Z TO 00Z
ACROSS SOUTHWEST/SOUTHERN NEBRASKA AND WE WILL SEE HOW THIS NEXT
ROUND UNFOLDS IN THE NEXT SEVERAL HOURS.

THE LOWLEVEL JET INCREASES TO AROUND 50KTS OVERNIGHT AND CONVECTION
SHOULD SUSTAIN/ORGANIZE AND ROLL EASTWARD DURING THE NOCTURNAL
HOURS.

THEN ON THURSDAY...BOUNDARIES LINGER IN THE MORNING THEN MAY LIFT
NORTH DURING THE AFTERNOON WHILE A COOL FRONT APPROACHES FROM THE
WEST IN THE AFTERNOON/EVENING.  THE FRONT PUSHES SOUTHEAST THURSDAY
NIGHT BRINGING ANOTHER CHC FOR STORMS.

LONG TERM...WILL KEEP THIS SHORT DUE TO EXPECTED SEVERE WEATHER.
SUNRISE FRIDAY THROUGH WEDNESDAY. CONCERN REVOLVES AROUND TEMPS AND
PRECIP AS RIDGE KEEPS TRYING TO BUILD INTO THE PLAINS WHILE WEST
COAST TROUGH KEEPS IT FROM BUILDING TOO FAR NORTH. A FEW DAYS AGO IT
LOOKED LIKE THE RIDGE WOULD BUILD IN AND WE WOULD BE HOT AND
PRIMARILY DRY. AS IN YEARS PAST...IT NOW LOOKS LIKE THIS MAY NOT
OCCUR AS DISTURBANCES ROTATING AROUND WEST COAST TROUGH MAY WORK
INTO THE AREA DURING THE PERIOD.  AS FAR AS TEMPS...WILL STILL BE
PLENTY WARM WITH SOME DAYS IN THE 80S AND OTHERS IN THE 90S.

COULD PROBABLY GO WITH OVERNIGHT POPS IN EVERY PERIOD...BUT FOR NOW
WILL INCLUDE IN THE FIRST PART OF THE EXTENDED AND MONITOR OVER NEXT
FEW DAYS.

&&

.GID WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
KS...NONE.
&&

Hazardous weather outlook, Jun 17, 9:25 PM CDT, 36 minutes before

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In the hours before

Local storm report, Jun 17, 9:05 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
905 PM CDT WED JUN 17 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0905 PM     TORNADO          6 W AURORA              40.87N 98.12W
06/17/2009                   HAMILTON           NE   STORM CHASER

            TORNADO ABOUT QUARTER MILE WIDE JUST SOUTH OF HIGHWAY 34.

&&

PFANNKUCH

Local storm report, Jun 17, 9:20 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
920 PM CDT WED JUN 17 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0912 PM     TORNADO          4 W AURORA              40.87N 98.08W
06/17/2009                   HAMILTON           NE   STORM CHASER

            LARGE TORNADO ALONG HIGHWAY 34 DOING DAMAGE

&&

PFANNKUCH

Special weather statement, Jun 17, 9:28 PM CDT, 33 minutes before

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Local storm report, Jun 17, 9:30 PM CDT, 31 minutes before

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Local storm report, Jun 17, 9:38 PM CDT, 23 minutes before

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Local storm report, Jun 17, 9:48 PM CDT, 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:08 PM CDT	Severe Thunderstorm Warning	GID	Greeley, Valley	52 min
Jun 17, 7:21 PM CDT	Tornado Warning	GID	Buffalo, Hall	24 min
Jun 17, 7:43 PM CDT	Severe Thunderstorm Warning	GID	Hall	47 min
Jun 17, 7:55 PM CDT	Tornado Warning	GID	Hall	35 min
Jun 17, 8:07 PM CDT	Severe Thunderstorm Warning	GID	Hall, Hamilton, Merrick	38 min
Jun 17, 8:09 PM CDT	Tornado Warning	GID	Hall	36 min
Jun 17, 8:12 PM CDT	Special Weather Statement	GID	Sherman	33 min
Jun 17, 8:18 PM CDT	Tornado Warning	GID	Buffalo, Sherman	27 min
Jun 17, 8:28 PM CDT	Severe Thunderstorm Warning	GID	Sherman	47 min
Jun 17, 8:42 PM CDT	Tornado Warning	GID	Hall, Hamilton, Merrick	33 min
Jun 17, 8:46 PM CDT	Severe Thunderstorm Warning Emergency	GID	Hall, Hamilton, Merrick	44 min
Jun 17, 8:46 PM CDT	Tornado Warning	GID	Sherman	29 min
Jun 17, 8:48 PM CDT	Severe Thunderstorm Warning	GID	Hamilton, York	42 min
Jun 17, 8:55 PM CDT	Severe Thunderstorm Warning	GID	Hamilton	50 min
Jun 17, 8:58 PM CDT	Tornado Warning Emergency	GID	Hamilton	32 min
Jun 17, 9:22 PM CDT	Tornado Warning Emergency	GID	Hamilton	23 min
Jun 17, 9:28 PM CDT	Special Weather Statement	GID	Howard	32 min
Jun 17, 9:29 PM CDT	Severe Thunderstorm Warning	GID	Hamilton, York	35 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2009 Every severe thunderstorm warning in 2009

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.