Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 96, NWS Hastings, NE

May 9, 2001Polk County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at May 9, 2001, 8:39 PM CDT for Polk 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 counties it named.

The facts

Issued: May 9, 2001, 8:39 PM CDT (01:39 UTC)
Expired: May 9, 2001, 9:30 PM CDT
In force: 51 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Polk County, NE

The radar

The Omaha radar (KOAX), 102 km from the middle of the area, began a volume at 01:38 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
May 9, 4:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.7 hours before the alert went out and 101 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: 1368 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 2240 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KGID 100139
SVRGRI
NEC143-100230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
839 PM CDT WED MAY 9 2001

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POLK COUNTY IN EAST CENTRAL NEBRASKA

* UNTIL 930 PM CDT

* AT 833 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTHWEST OF POLK...OR ABOUT 23 MILES
  NORTHWEST OF YORK...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STROMSBURG AT 850 PM CDT
  SHELBY AT 900 PM CDT

PEOPLE IN POLK COUNTY SHOULD SEEK SHELTER IN A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS. THE @PRIMARY SEVERE WEATHER THREAT IS LARGE
HAIL.

$$

KD

LAT...LON 4121 9773 4105 9781 4109 9740 4135 9742

NNNN

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 May 9, 2:55 PM CDT, 5 hours 44 minutes earlier.

Area forecast discussion, May 9, 2:55 PM CDT, 5 hours 44 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
255 PM CDT WED MAY 9 2001

THUNDERSTORM INITIATION AND LOCATION THE MAIN PROBLEMS. SOME
SURPRISE HUH?

BELIEVE THE FOCUS TONIGHT IS ON TWO AREAS. THE FIRST IS NEAR
STALLING BOUNDARY TO OUR NORTH AND NORTHEAST. ADVECTION OF
LOW LEVEL MOISTURE IMPRESSIVE EASTERN/SOUTHERN CWFA. PARAMETERS
APPEAR TO SET UP JUST EAST OF US...AT LEAST EARLY TONIGHT...AS
WARM MID LEVEL TEMPERATURES ACTING TO CAP THINGS NOW. NO SIGN
YET THAT CAP IS WEAKENING IN CWFA. MODERATE RISK SNATCHES EAST
CWFA. M0DEL QPF DIFFERENCES WELL DOCUMENTED. THIS IS VERY
SIMILAR TO AN EVENT LAST WEAK WITH A STRONGER FRONT (CURRENTLY
OUR "REAL" FRONT IS WELL NORTH OF NEBRASKA) AND WAVE. ALL THE
ACTION WAS WELL NORTHEAST. WON/T DEVIATE TOO MUCH FROM SPC
OUTLOOK...BUT LOWER POPS SOME TONIGHT. THIS TREND WAS BORN OUT
IN THE MORNING GUIDANCE AS WELL.

OTHER AREA OF CONCERN IS JUST SOUTHWEST OF CWFA. LAPS DATA SUGGEST
THIS AN AREA OF WEAKENING CAP. TEMPERATURES IN THE UPPER 80S WITH
SUFFICIENT LOW LEVEL MOISTURE...ALBEIT MIXED OUT SOME AND SHALLOW.
DISCONTINUITY IS CURRENTLY A FOCUS FOR DEVELOPMENT IN SOUTHEAST
COLORADO...AND THERE ARE HINTS OF CU LINE FORMING TO THE NORTHEAST
ALONG MOISTURE BOUNDARY WHICH EXTENDS UP INTO SOUTHWEST NEBRASKA.
HAVING SAID THAT...WITH RESIST TIMING ANYTHING DOWN THERE AND
KEEP 30 POPS FOR THE CHANCE SOMETHING MIGHT MOVE INTO THAT AREA
THIS EVENING.

THURSDAY AFTERNOON AND EVENING COULD/SHOULD BE RATHER ACTIVE
WITH WAVE TO SLIDE ALONG STALLED FRONTAL BOUNDARY IN SOUTHERN
CWFA. COMPROMISE OF LOW LEVEL MOISTURE FIELDS LOOK APPROPRIATE
BUT OVERALL...CONDITIONS SETTING UP FOR SEVERE WEATHER. HEAVY
RAIN IN THE SOUTHEAST WITH PW APPROACHING 1.5 INCHES...MAINLY
OVER AREAS OF MOST RECENT AND HEAVIEST RAINS. SLOWER FRONT LIKELY
MEANS SLIGHTLY WARMER TEMPERATURES THURSDAY THAN PREVIOUS RUN.
BELIEVE TREND ON FRIDAY WILL BE CLEARING DURING THE DAY...WITH
EXPECTED THURSDAY NIGHT CONVECTION PUSHING FRONT SOUTH OF CWFA.

THE EXTENDED LOOKS WARMER COME SUNDAY AND MONDAY...AHEAD OF FRONT
MOVING SOUTHEAST. COOLER TUESDAY AND WEDNESDAY. HAVE ADUJUSTED
TEMPERATURES ACCORDINGLY.

.GID...NONE.

MORITZ

In the hours before

Special weather statement, May 9, 6:10 PM CDT, 2 hours 29 minutes before

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-100300-

SEVERE WEATHER OUTLOOK - SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS
NATIONAL WEATHER SERVICE HASTINGS NE
610 PM CDT WED MAY 9 2001

...SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS EVENING ACROSS
PARTS OF SOUTH CENTRAL NEBRASKA AND NORTH CENTRAL KANSAS...

THUNDERSTORM DEVELOPMENT THIS EVENING WILL BE FOCUSED ALONG TWO LOW
LEVEL BOUNDARIES.  THUNDERSTORMS WILL DEVELOP ALONG A WEAK COLD
FRONT FROM NORTHEAST NEBRASKA INTO CENTRAL NEBRASKA.  THIS FRONT AND
ITS ASSOCIATED STORMS...WILL GRADUALLY SLIP SOUTHEAST THIS EVENING.

ANOTHER AREA OF THUNDERSTORM DEVELOPMENT IS EXPECTED ALONG A DRY
LINE FROM SOUTHWEST NEBRASKA ACROSS WESTERN KANSAS.  THESE STORMS
WILL MOVE EAST TOWARD HIGHWAY 183 DURING THE EVENING HOURS.

VERY STRONG INSTABILITY AND RELATIVELY WEAK ATMOSPHERIC SHEAR WOULD
SUGGEST THE MAIN THREAT WILL CONSIST OF LARGE HAIL AND DAMAGING
WINDS.  STILL...THE POSSIBILITY OF A FEW TORNADOES CANNOT BE RULED
OUT.

SEVERE THUNDERSTORM WATCHES ARE ALREADY IN EFFECT FOR PARTS OF
SOUTH CENTRAL NEBRASKA AND NORTH CENTRAL KANSAS.  CHECK YOUR LOCAL
FORECAST OR TUNE TO NOAA WEATHER RADIO FOR DETAILS.

DROZD

Local storm report, May 9, 7:34 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
734 PM CDT WED MAY 09 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
T
0728 PM    FULLERTON                 NE    .75 INCH HAIL
05/09/01   NANCE

Local storm report, May 9, 7:46 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
746 PM CDT WED MAY 09 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0735 PM    LEXINGTON                 NE    1.75 INCH HAIL
05/09/01   DAWSON

Local storm report, May 9, 8:05 PM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
805 PM CDT WED MAY 09 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
Q
0805 PM    FULLERTON                 NE    1.75 INCH HAIL
05/09/01   NANCE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:02 PM CDT	Severe Thunderstorm Warning	GID	Nance	43 min
May 9, 7:28 PM CDT	Severe Thunderstorm Warning	GID	Dawson	47 min
May 9, 7:53 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Nance	52 min
May 9, 7:56 PM CDT	Severe Thunderstorm Warning	GID	Buffalo, Sherman	49 min
May 9, 8:03 PM CDT	Severe Thunderstorm Warning	GID	Gosper	42 min
May 9, 8:10 PM CDT	Tornado Warning	GID	Merrick	35 min
May 9, 8:17 PM CDT	Severe Thunderstorm Warning	GID	Phelps	43 min
May 9, 8:36 PM CDT	Severe Thunderstorm Warning	GID	Hall	54 min
May 9, 8:43 PM CDT	Severe Thunderstorm Warning	GID	Buffalo	47 min
May 9, 8:53 PM CDT	Severe Thunderstorm Warning	GID	Furnas, Harlan	52 min
May 9, 9:11 PM CDT	Severe Thunderstorm Warning	GID	Hamilton, Merrick	49 min
May 9, 9:18 PM CDT	Severe Thunderstorm Warning	GID	Franklin	42 min
May 9, 9:22 PM CDT	Severe Thunderstorm Warning	GID	Adams	53 min
May 9, 9:29 PM CDT	Severe Thunderstorm Warning	GID	Polk, York	46 min
May 9, 9:39 PM CDT	Severe Thunderstorm Warning	GID	Hall	36 min
May 9, 9:51 PM CDT	Severe Thunderstorm Warning	GID	Webster	39 min
May 9, 9:59 PM CDT	Severe Thunderstorm Warning	GID	Clay, Nuckolls	46 min
May 9, 10:06 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, York	54 min
May 9, 10:25 PM CDT	Severe Thunderstorm Warning	GID	Thayer	65 min
May 9, 10:44 PM CDT	Severe Thunderstorm Warning	GID	Nuckolls	31 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2001 Every severe thunderstorm warning in 2001

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.