Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 133, NWS Hastings, NE

August 21, 1997Nance County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Aug 21, 1997, 2:49 PM CDT for Nance 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: Aug 21, 1997, 2:49 PM CDT (19:49 UTC)
Expired: Aug 21, 1997, 3:30 PM CDT
In force: 41 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Nance County, NE

The radar

The Grand Island radar (KUEX), 126 km from the middle of the area, began a volume at 19:50 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, 7.8 hours before the alert went out and 220 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: 969 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 348 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 21, 2:39 PM CDT, 10 minutes earlier.

Area forecast discussion, Aug 21, 2:39 PM CDT, 10 minutes before

CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
238 PM CDT THU AUG 21 1997

THUNDERSTORMS MAIN CONCERN AGAIN THIS PACKAGE IN NW FLOW ALOFT.

WILL BEGIN FORECAST DISCUSSION WITH YESTERDAYS MODEL RUNS.  THEY INDCTD
IMPRESSIVE ISENT LIFT OVER SW FA BY THU MORNING.  1.25 IN PCPTBL H2O
VALUES WERE LIFTED TO SATURATION ALONG FAVORED 570 THICKNESS CONTOUR
WHICH RUNS RIGHT THROUGH SVR WX AREA THIS MORNING AS PER K0K.

ON GOING ELEVATED CONVECTION ATTM ALSO NEAR 570 TKNS CONTOUR AS PER K1K
AS 1.25 IN CONTS TO BE LIFTED AS PER P03.  ALSO COMING INTO PLAY TAFTN
IS A JET MAX RIDING NW-SE ACROSS MN/IA AD H7 S/W BOTH PER 12Z UA/PROFS.
THESE FEATURES HARD TO DISCERN ON WV IMGRY.  THESE STORMS SHOULD CONT
INTO EARLY EVENING GRADUALLY SINKING SWD.

WHAT IS MORE EVIDENT ON SATELLITE ARE OUTFLOW BNDRIES FROM MORNING TRWS
AND NW NEBR S/W WITH IMPRESSIVE DRYING AS PER GLD AFD.  THESE SHUD
COMBINE WITH MST/UNSTABLE AIR FOR TSTMS THIS EVENING NEBR AND INTO THE
NIGHT KS.  ALTHOUGH CELL MOVEMENTS QUICK...SOME TRAINING AS OCCURRED
THIS MORNING...COULD PRODUCE HEAVY AMOUNTS AND WILL MENTION IN KS TNGT.
WILL ALSO MENTION PSBLTY OF SVR WX OVER WRN SECTIONS OF FA CLOSER
WHERE SHEAR PROFILES AND HIGHER INSTABILITIES WARRANT HIGHER SVR WX
THREAT.

MODELS HAVE A TOUGH TIME WITH THIS NW FLOW SO CANT SAY THAT ANY DO A
FANTASTIC JOB.  NGM DID INITIALIZE VVEL FAIRLY WELL THIS MORNING.
WILL GO WITH TYPICAL BLEND OF MODELS USING WV IMGRY EXTRAPOLATION TO
GET SOME SEMBLANCE OF TIMING OF PSBL TSTMS FOR OUT PDS.

IT APPEARS THAT AFTER TNGT...NEXT CHC COMES AGAIN FRI AND INTO THE
EVENING AS A PORTION OF IGNACIO COMES DOWN FRONT SIDE OF UPPER RIDGE.
NGM HINTS AT THE RESULTING PRECIP BEST BUT MAY BE A LITTLE SLOW WITH
TIMING.  WILL GO WITH SMALL POPS FRI/FRI NGT AND LEAVE SAT DRY ATTM
AS THERE SHOULD BE SOME BREAK BETWEEN WAVES AFTER TROP SYS REMNANT
PASSES.

TEMPS FRIDAY PROBABLY A TAD WARMER THAN TODAY WITH ERLY AM TSTMS NOT
FCST.  SATURDAY REMAINS UP IN THE AIR BUT WILL GO EVEN A LITTLE MORE
WARMER AS UPPER RIDGE BUILDS/SHIFTS SLGTLY EWD.  FWC/FAN BLEND RSNBL
EXCEPT THAT MINS ARE A LITTLE ON THE COOL SIDE GIVEN CURRENT DEW POINTS.
.
GRI BB 064/082/064/085 4331
ODX BB 061/083/063/085 3331
LXN BB 063/084/062/086 4331
HBR BB 065/083/065/085 4331
BEL BB 067/084/066/086 5331

DROZD

In the hours before

Local storm report, Aug 21, 11:52 AM CDT, 2 hours 57 minutes before

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Local storm report, Aug 21, 11:53 AM CDT, 2 hours 56 minutes before

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Special weather statement, Aug 21, 11:53 AM CDT, 2 hours 56 minutes before

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Special weather statement, Aug 21, 11:54 AM CDT, 2 hours 55 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
Aug 21, 7:58 AM CDT	Severe Thunderstorm Warning	GID	Buffalo	32 min
Aug 21, 9:11 AM CDT	Severe Thunderstorm Warning	GID	Kearney	34 min
Aug 21, 9:44 AM CDT	Severe Thunderstorm Warning	GID	Franklin	46 min
Aug 21, 2:33 PM CDT	Severe Thunderstorm Warning	GID	Valley	42 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1997 Every severe thunderstorm warning in 1997

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.