Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 224, NWS Hastings, NE

August 17, 2002Harlan County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Aug 17, 2002, 2:40 AM CDT for Harlan County, Nebraska. It was in force for 50 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 17, 2002, 2:40 AM CDT (07:40 UTC)
Expired
Aug 17, 2002, 3:30 AM CDT
In force
50 min
Issued by
NWS Hastings, NE
Area
Counties, with a storm outline in the text

County Harlan County, NE

The radar

The Grand Island radar (KUEX), 87 km from the middle of the area, began a volume at 07:40 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

IssuedProductOfficeLasted
Aug 16, 11:20 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 7.7 hours before the alert went out and 147 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2002-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2049 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2002-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2049 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
3249 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.0

Open this sounding in Storm Lab

The text

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

663 
WUUS53 KGID 170740
SVRGRI
NEC083-170830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
240 AM CDT SAT AUG 17 2002

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HARLAN COUNTY IN SOUTH CENTRAL NEBRASKA

* UNTIL 330 AM CDT

* AT 234 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES NORTH OF STAMFORD...OR ABOUT 16 MILES
  SOUTHWEST OF HOLDREGE...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HUNTLEY AT 250 AM CDT
  REPUBLICAN CITY AT 255 AM CDT
  HARLAN COUNTY DAM AT 300 AM CDT

PEOPLE IN HARLAN COUNTY SHOULD SEEK SHELTER IN A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS.

THE PRIMARY SEVERE WEATHER THREAT IS STRONG AND DAMAGING WINDS IN 
EXCESS OF 60 MPH. HAIL TO SIZE OF DIMES IS POSSIBLE.

LAT...LON 4002 9959 4032 9961 4032 9923 4003 9919

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 Aug 17, 2:15 AM CDT, 25 minutes earlier.

Area forecast discussion, Aug 17, 2:15 AM CDT, 25 minutes before
SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
215 AM CDT SAT AUG 17 2002

QNS OF THE PACKAGE INCLUDE LINGERING 1ST PD TSRA AND ONGOING WIND
ADVISORY AS STRONG CDFNT PLOUGHS THRU THE GID CWA.  AS OF 07Z...SVR
WAS MARGINAL AND POST FRONT WND IS BLO ADVISORY CRITERIA OVR THE
CWA.  40 TO 45 KT WERE CONFINED TO THE LEAD EDGE OF THE TSRA.
UPSTREAM PRES SURGE OF +8 MB NOTED AT SFD...AND WL WATCH...BUT
CURRENT IND ARE THAT WND ADV WL NOT BE NEEDED.

OTHERWISE UPR LOW XS THE NRN PLNS TDA WITH PROGGED TRACK N OF THE
GREAT LAKES.  RESULT WL BE ZONAL FLOW OVR THE CNTRL PLNS WITH LEE
TROFG AND FRONT INITIALLY STALLED OVR KS.

WL STAY WITH THE CONSERVATIVE APPROACH THIS MRNG AND SEE WHERE THE
FRONT ENDS UP.  WL STAY DRY FOR SAT NGT AS TIMING AND STRONG PUSH WL
DRIVE IT SUFFICIENTLY S.  SUN NGT MAY BE THE BTR SHOT...BUT
ETA/AVN VERSIONS OF LLVL MSTR CNVRGNC ARE A BIT S TO INCLUDE NEB
ZONES.  WL MAKE THAT ADJUSTMENT ALNG WITH INCLUSION OF THE ENTIRE
CWA WITH A PCPN MENTION MON NGT WITH WARM FRONT LIFTING NWD.

NO ADJUSTMENT TO LATTER PDS NEEDED WITH THIS ISSUANCE.

.GID...NONE

09

In the hours before

Special weather statement, Aug 16, 11:42 PM CDT, 2 hours 58 minutes before
KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-171200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HASTINGS NE
1142 PM CDT FRI AUG 16 2002

...SPOTTER ACTIVATION WILL BE REQUIRED TONIGHT OVER SOUTH CENTRAL
NEBRASKA AND NORTH CENTRAL KANSAS...

AS EXPECTED...AN ERUPTION OF THUNDERSTORMS IN CENTRAL NEBRASKA WILL
LEAD TO A LINE OF STRONG TO SEVERE THUNDERSTORMS ACROSS SOUTH CENTRAL
NEBRASKA AND NORTH CENTRAL KANSAS OVERNIGHT.

A COLD FRONT PLOWING INTO A VERY UNSTABLE AIRMASS ACROSS THE REGION
WILL MOVE RAPIDLY SOUTHEAST OVERNIGHT. A LINE OF THUNDERSTORMS
CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 60 MPH...AND HAIL TO
THE SIZE OF GOLF BALLS...WILL MOVE ACROSS THE AREA. BETWEEN MIDNIGHT
AND 2 AM...AREAS NORTH OF INTERSTATE 80 IN SOUTH CENTRAL NEBRASKA
WILL HAVE THE BEST SHOT AT SEVERE WEATHER. BETWEEN 2 AND 5 AM...THE
RISK FOR SEVERE STORMS WILL SPREAD SOUTH TO THE KANSAS BORDER...AND
EVENTUALLY INTO NORTH CENTRAL KANSAS BY DAWN. A SEVERE THUNDERSTORM
WATCH IS IN EFFECT FOR ALL OF SOUTH CENTRAL NEBRASKA UNTIL 5 AM.

IT IS LIKELY SOME SPOTTER GROUPS WILL NEED TO BE DEPLOYED TONIGHT.
ALL RESIDENTS OF SOUTH CENTRAL NEBRASKA AND NORTH CENTRAL KANSAS...
SHOULD CONTINUE TO REMAIN VIGILANT TO THE POSSIBILITY OF SEVERE
WEATHER DURING THE NIGHT.

THIS FAST MOVING COLD FRONT WILL EXIT THE REGION EARLY SATURDAY
MORNING...LEAVING A MUCH COOLER AND DRYER AIRMASS IN PLACE.

MORITZ
Special weather statement, Aug 17, 2:33 AM CDT, 7 minutes before
NEZ039>041-046>049-060>064-072>077-082>087-171000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
233 AM CDT SAT AUG 17 2002

...SEVERE THUNDERSTORM WATCH NUMBER 617 IS NO LONGER IN EFFECT FOR
GOSPER...DAWSON...BUFFALO...SHERMAN...VALLEY...GREELEY...HOWARD...
NANCE...MERRICK...AND POLK COUNTIES...

THE LINE OF STRONG TO SEVERE STORMS HAS MOVED SOUTH OF THESE
COUNTIES WITH A PASSING COLD FRONT.  SEVERE WEATHER IS NO LONGER
EXPECTED IN THESE AREAS THIS MORNING.

HOWEVER...SEVERE THUNDERSTORM WATCH NUMBER 617 WILL REMAIN IN
EFFECT UNTIL 5 AM FOR THE REST OF SOUTH CENTRAL NEBRASKA
INCLUDING HALL...ADAMS...YORK...HAMILTON...FILLMORE...CLAY...
NUCKOLLS...THAYER...WEBSTER...FRANKLIN...KEARNEY...PHELPS...HARLAN...
AND FURNAS COUNTIES.

09

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 12:01 AM CDTSevere Thunderstorm WarningGIDValley59 min
Aug 17, 12:25 AM CDTSevere Thunderstorm WarningGIDGreeley65 min
Aug 17, 12:35 AM CDTSevere Thunderstorm WarningGIDHoward, Sherman55 min
Aug 17, 12:42 AM CDTSevere Thunderstorm WarningGIDDawson63 min
Aug 17, 1:07 AM CDTSevere Thunderstorm WarningGIDNance53 min
Aug 17, 1:30 AM CDTSevere Thunderstorm WarningGIDBuffalo60 min
Aug 17, 1:32 AM CDTSevere Thunderstorm WarningGIDGosper58 min
Aug 17, 2:16 AM CDTSevere Thunderstorm WarningGIDFurnas59 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002Every severe thunderstorm warning in 2002

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.