Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 347, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jul 12, 2001, 12:55 AM CDT for Gage County, Nebraska. It was in force for 35 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 12, 2001, 12:55 AM CDT (05:55 UTC)
- Expired
- Jul 12, 2001, 1:30 AM CDT
- In force
- 35 min
- Issued by
- NWS Omaha, NE
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Gage County, NE
The radar
The Omaha radar (KOAX), 121 km from the middle of the area, began a volume at 05:55 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 12, 1:00 AM CDT | Hail 0.75 | Barneston, NE |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 5.9 hours before the alert went out and 167 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
- 1503 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1381 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 571 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 24.0
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 Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 3:00 PM CDT, 9 hours 55 minutes earlier.
Area forecast discussion, Jul 11, 3:00 PM CDT, 9 hours 55 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 300 PM CDT WED JUL 11 2001 CHANCE OF PCPN OVERNIGHT...WITH POTENTIAL FOR HVY RAIN IN SOUTHEAST NEBRASKA IS THE MAIN PROBLEM IN THE SHORT TERM. SURFACE ANALYSIS AT 19Z SHOWED LOW PRES CENTERED OVER THE OK PNHDL...WITH A WARM FRONT CURVING FROM THE LOW INTO NRN KS AND THEN INTO SRN MO. DEWPOINTS IN THE UPPER 60S TO MID 70S WERE BEING PULLED UP IN THE SELY FLOW. PATCHY LIGHT SHOWERS/WEAK TSTMS EXPECTED ACROSS MOST OF OUR AREA DURING THE EVENING...ASSOCIATED WITH VORT MAX AND SHORTWAVE MOVING IN FROM CNTRL NE. THERE IS SOME POTENTIAL FOR SEVERE STORMS IN SERN NE...CLOSER TO FRONTAL BOUNDARY. AIRMASS IS HEATING UP NICELY WITH LOWER 90S AS FAR NORTH AS CONCORDIA. EXPECT ANOTHER MCS OVER THE WRN HIGH PLAINS EARLY TONIGHT...THEN IT SHOULD MOVE EWD. THIS WILL LIKELY MERGE WITH ANOTHER AREA OF CONVECTION THAT DEVELOPS IN SCNTRL NE OR NCNTRL KS. PRECIPITABLE WATER VALUES REMAIN HIGH WITH OVER TWO INCHES ON THE TOPEKA SOUNDING THIS MORNING. ETA DEPICTS THIS MAINLY TO OUR SOUTH...BUT LATEST GOES SOUNDER OUTPUT SHOWS IT CURRENTLY OVER SERN NE/NERN KS AND NWRN MO. WILL NOT ISSUE A FLASH FLOOD WATCH AT THIS TIME...BUT WILL MENTION AREAS OF HEAVY RAIN. 12Z ETA APPEARS TOO FAR S WITH ITS QPF. EXPECT LOWS IN THE MID 60S NORTH TO AROUND 70 SOUTH. OVERALL...HAVE LEANED TOWARD A BLEND OF THE 12Z ETA AND AVN MODEL OUTPUTS FOR THE THURSDAY-FRIDAY FORECAST. FLOW PATTERN DOES CHANGE A LITTLE...CENTER OF 500 MB HIGH MOVES SWWD. MCS THURSDAY NIGHT EXPECTED TO BE FARTHER SOUTH...IN KANSAS. WILL STILL HOLD ONTO SOME CHANCE OF PCPN THURSDAY NIGHT MOST AREAS...BUT ONLY KEEP POPS IN NERN NE FOR FRIDAY. SOME COOLER AIR WILL MOVE IN AT THE LOW LEVELS...AS HIGH PRES BUILDS DOWN FROM WI AND MN ON FRIDAY. TEMPS WILL BE A LITTLE BELOW NORMAL FOR THIS TIME OF THE YEAR. IN THE EXTENDED PERIOD...WILL HAVE TO KEEP SOME CHANCE OF TSTMS SUNDAY THROUGH WEDNESDAY. FIRST DRAFT OF THE WORK ZONES WAS SENT. .OMA...NONE. MILLER
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 1:30 AM CDT | Severe Thunderstorm Warning | OAX | Gage | 30 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2001Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.