Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 67, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 13, 1997, 5:38 AM CDT for Dakota County, Nebraska. It was in force for 32 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
- Jul 13, 1997, 5:38 AM CDT (10:38 UTC)
- Expired
- Jul 13, 1997, 6:10 AM CDT
- In force
- 32 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Dakota County, NE
The radar
The Omaha radar (KOAX), 120 km from the middle of the area, began a volume at 10:37 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
Omaha, NE (KOAX), launched 00:00Z, 10.6 hours before the alert went out and 120 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.
- Mixed-layer CAPE
- 3403 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
572 WUUS1 KFSD 131040 RRA SVRFSD NEC043-131110- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 538 AM CDT SUN JUL 13 1997 * SEVERE THUNDERSTORM WARNING FOR DAKOTA COUNTY IN NORTHEASTERN NEBRASKA * UNTIL 610 AM CDT * SOME AREAS AFFECTED WILLIS AROUND 545 AM CDT HUBBARD AROUND 550 AM CDT JACKSON AROUND 550 AM CDT HOMER AROUND 600 AM CDT * AT 535 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A DEVELOPING SEVERE THUNDERSTORM 21 MILES WEST OF SIOUX CITY OR 9 MILES WEST OF HUBBARD MOVING EAST AT 30 MPH. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED UNLESS IN AN EMERGENCY. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. BLOOM
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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 12, 8:19 PM CDT, 9 hours 19 minutes earlier.
Area forecast discussion, Jul 12, 8:19 PM CDT, 9 hours 19 minutes before
SOUTH DAKOTA/NORTHWEST IOWA/SOUTHWEST MINNESOTA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 815 PM CDT SAT JUL 12 1997 TROPICAL SHRA/TSRA THAT DVLPD OVR SERN SD LATE THIS AFTN HAD DSIPTD BY 01Z. STILL HAVE A FEW WDLY SCTD TSRA OVR EXTRM SERN PORTION OF NWRN IA IN OUR CWA WHICH WL LKLY CONT THRU 04Z. STRONG/SVR STORMS OVR SWRN SD NOT IN ANY HURRY TO MOV EWD AS UPR LVL SHRTWV HOLDS IN NRN RCKYS. STARTING TO SEE SOME EWD PUSH OF THIS SYSTEM...AND MODELS ALL SHOW THIS MOVG THRU DKTAS BETWEEN 12Z SUNDAY AND 00Z MONDAY. FSD CWA CUD SEE SOME SHRA/TSRA MOVG IN FM W LATE TNGT...BUT DO NOT FEEL THAT SWRN SD STORMS WL HOLD TOGETHER INTO CNTRL SD PAST MDNGT AS THEY MOV AWAY FROM UPR LVL SUPPORT. NEARLY ALL OF OUR AREA WL LIKELY HAVE TO WAIT FOR REDEVELOPMENT DURING THE DAY SUNDAY. THEREFORE...WL CUT BACK OR DROP MENTION OF POPS FOR TNGT FOR MUCH OF THE CWA XCPT FOR THE XTRM SERN AND WRN PORTIONS. OVRNGT LOWS FOR THE FSD CWA LOOK PRETTY GOOD. MAY MAKE SOME MINOR ADJUSTMENTS. .FSD...NONE GILLISPIE
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:00 AM CDT | Severe Thunderstorm Warning | FSD | Dakota | 45 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1997Every 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.