Alert archive / Nebraska / Special Weather Statements in 2012
Special Weather Statement, NWS Omaha, NE
NWS Omaha, NE issued this special weather statement at Jun 10, 2012, 11:29 PM CDT for Otoe County, Nebraska; Mills County, Iowa. It was in force for 31 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
- Jun 10, 2012, 11:29 PM CDT (04:29 UTC)
- Expired
- Jun 11, 2012, 12:00 AM CDT
- In force
- 31 min
- Issued by
- NWS Omaha, NE
Counties Mills County, IA, Otoe County, NE
The radar
The Omaha radar (KOAX), 74 km from the middle of the area, began a volume at 04:29 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, 4.5 hours before the alert went out and 75 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
- 863 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1243 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jun 10, 6:32 PM CDT, 4 hours 57 minutes earlier.
Area forecast discussion, Jun 10, 6:32 PM CDT, 4 hours 57 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 632 PM CDT SUN JUN 10 2012 .AVIATION... 00Z TAFS FOR KOMA...KLNK...KOFK. MID CLOUDS HAVE CLEARED KOFK AND NORTHWEST WINDS SHOULD DECREASE THIS EVENING WITH VFR CONDITIONS. COLD FRONT WAS OVER THE KOMA TAF SITE AT 6 PM AND THUNDERSTORM ACTIVITY MAY BE IN THE AREA FOR AN HOUR OR TWO YET THIS EVENING. CLOUDS WILL DECREASE AFTER MIDNIGHT. THE COLD FRONT MOVED PAST KLNK AROUND 5 PM AND NORTHWEST WINDS WILL DIMINISH. ALTHOUGH THERE ARE SOME SPOTTY SHRA/TSRA BEHIND THE FRONT...DID NOT MENTION ANYTHING AT KLNK. EXPECT A GRADUAL DECREASE IN CLOUDS THERE THROUGH THE EVENING AT KLNK. NORTHWEST WINDS WILL INCREASE WITH SOME GUSTS 20-25 KNOTS BY MID TO LATE MORNING MONDAY. MILLER && .PREV DISCUSSION... /ISSUED 313 PM CDT SUN JUN 10 2012/ DISCUSSION... FORECAST CHALLENGE IN THE VERY SHORT TERM DEALS WITH THUNDERSTORM CHANCES...COVERAGE AND STRENGTH. AFTER THAT NEXT CONCERN IS WHEN OR IF TO TRIM/DROP PRECIP CHANCES LATE NEXT WEEK INTO NEXT WEEKEND FROM THOSE FORECAST BY A MODEL CONSENSUS/PREVIOUS FORECAST BLEND. TONIGHT...COLD FRONT AT 00Z/7PM IS EXPECTED TO EXTEND NEAR A HARLAN IA-A LITTLE WEST OF SHENANDOAH IA-AUBURN AND PAWNEE CITY LINE. WILL GENERALLY CARRY A 3HR LIKELY POP WINDOW THAT REGION AND LOCATIONS ESE ALONG WITH MENTION OF A SEVERE THREAT AS ML CAPE VALUES WILL MOST LIKELY BE IN THE VICINITY OF 2K J/KG AND EFFECTIVE BULK SHEAR WAS...PER SPC MESO PAGE...INCREASING TO AOA 30KTS. SINCE A LITTLE HIGH BASED ACCAS-LIKE SHOWERS HAD DEVELOPED POST FRONTAL IN NERN NEBRASKA AS OF 19Z...LINGERED SMALLER AND DECREASING POPS BACK TO LNK/FREMONT. STILL FEEL BULK OF ACTIVITY WILL BE ESE OF THE FORECAST AREA BY 06Z IF NOT 03Z AND STARTED DRASTICALLY LOWERING/DROPPING POPS BY THEN. DID KEEP A SLIVER OF POPS IN SERN CORNERS AFTER 06Z MAINLY FOR COORDINATION PURPOSES BUT ALSO BECAUSE H85 FRONT LINGERS WEAKENING SFC FRONT. AS EXPECTED THIS TIME OF YEAR...AIRMASS WAS RECOVERING BEHIND THE FRONT BUT IT HAD ALSO DRIED OUT. THAT SAID...BELIEVE FOR THE MOST PART GUIDANCE WAS A LITTLE TOO COOL... ESPECIALLY SERN 1/2...SINCE PUSH BEHIND FRONT WILL BE WEAKENING...NIGHT IS SHORT AND GROUND WARM. MONDAY AND TUESDAY...KEPT FORECAST DRY THOSE PERIODS AS SECONDARY LOBE ROTATING AROUND ENE DEPARTING UPPER TROUGH WILL BE SENDING HIGH PRESSURE DOWN MISSOURI AND UPPER MS VALLEYS. GFS WAS A BIT MORE BULLISH IN COOLING ON MONDAY BUT IT LOOKED LIKE A GFS/NAM BLEND WAS STILL WARRANTED WITH LTL/NO CHANGES FROM PREV FORECAST. WARM ADVECTION ON BACK SIDE OF HIGH COUPLED WITH A WEAK WAVE MOVING ACROSS THE PLAINS COULD TOUCH OFF A FEW SHOWERS/TSTMS LATE TUESDAY BUT RESTRICTED ANY MENTION UNTIL TUE NIGHT. SINCE 12Z ECMWF SUPPORTED SLIGHTLY COOLER GFS FOR MAX TEMPS ON TUESDAY...WHICH WERE CLOSE TO PREV FORECAST...LITTLE/NO CHANGES MADE. WEDNESDAY THROUGH SUNDAY. AFOREMENTIONED SHORTWAVE ENERGY WILL BE TRACKING INTO ERN DAKOTAS/ERN NEBR WEDNESDAY WITH DECENT AGREEMENT BETWEEN GFS/NAM/ECMWF. COUPLED WITH MOISTURE AND SOME INSTABILITY RETURN...SPREAD SMALL POPS FROM WESTERN AND NORTHERN SECTIONS WED INTO THE SERN 2/3RDS OR SO WED NIGHT. GENERALLY DRY THEN BEHIND WAVE ON THURSDAY. STILL SOME HINT AT ANOTHER PIECE OF ENERGY OR MID LEVEL MOISTURE POCKET WANDERING NWD INTO CENTRAL PLAINS LATE THURSDAY INTO FRIDAY BUT ANY LOW LEVEL BOUNDARY SHOULD BE FAR NW OF FORECAST AREA. THUS AT THIS TIME JUST LINGERED SOME SLIGHT CHANCE POPS W AND/OR N THU NIGHT AND FRIDAY CLOSER TO UPPER JET TRACK. AFTER THAT GFS DEEPENED NEXT UPPER TROUGH KEEPING ANY FRONT TO OUR WEST THROUGH NEXT WEEKEND ALONG WITH AN APPARENT MINIMAL CHANCE OF PRECIP. ECMWF WAS MORE PROGRESSIVE WITH UPPER TROUGH WHICH SHOVED A WEAKENING FRONT INTO ERN NEBRASKA/SWRN IA SATURDAY WITH IT RETURNING NORTH OR WASHING OUT ON SUNDAY. BECAUSE OF THESE DIFFERENCES...A LOW CONFIDENCE SMALL POP FORECAST WAS CARRIED IN THE SAT THROUGH SUNDAY TIME PERIOD. VERY LITTLE/NO CHANGES MADE TO A MODEL TEMPERATURE BLEND DUE TO CLOUD/PRECIP UNCERTAINTIES...BUT WOULD SUSPECT THAT IN GENERAL MAX TEMPS WOULD NEED INCREASING IN LATER FORECASTS IF TRENDS WOULD LEAN TOWARD SLOWER GFS. CHERMOK && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. &&
Hazardous weather outlook, Jun 10, 4:30 PM CDT, 6 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 430 PM CDT SUN JUN 10 2012 NEZ011-012-015>018-030>033-042-043-050-065-111100- ANTELOPE-BOONE-BUTLER-CEDAR-COLFAX-CUMING-KNOX-MADISON-PIERCE-PLATTE- SEWARD-STANTON-THURSTON-WAYNE- 430 PM CDT SUN JUN 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF EASTERN NEBRASKA. .DAY ONE...TONIGHT AND MONDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SUNDAY THERE WILL BE OFF AND ON THUNDERSTORM CHANCES FROM TUESDAY NIGHT INTO WEDNESDAY THEN FROM THURSDAY NIGHT INTO SUNDAY AS NUMEROUS WEATHER DISTURBANCES MOVE THROUGH THE PLAINS. FRIDAY AND SATURDAY LOOK TO BE THE MOST ACTIVE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION SHOULD NOT BE NEEDED TONIGHT OR MONDAY. IAZ043-055-056-069-079-080-090-091-NEZ034-044-045-051>053-066>068- 078-088>093-111100- BURT-CASS-DODGE-DOUGLAS-FREMONT IA-GAGE-HARRISON IA-JEFFERSON- JOHNSON-LANCASTER-MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE- PAGE IA-PAWNEE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS- SHELBY IA-WASHINGTON- 430 PM CDT SUN JUN 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF EASTERN NEBRASKA AND SOUTHWEST IOWA. .DAY ONE...TONIGHT AND MONDAY SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE THROUGH THE EVENING...MAINLY EAST AND SOUTHEAST OF A LINE FROM PENDER TO SEWARD. A SEVERE THUNDERSTORM WATCH IS IN EFFECT. A COLD FRONT WILL HELP TRIGGER THE THUNDERSTORM ACTIVITY AS IT PUSHES EAST. STORMS SHOULD DECREASE IN STRENGTH AND COVERAGE BY AROUND 11 PM. .DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SUNDAY THERE WILL BE OFF AND ON THUNDERSTORM CHANCES FROM TUESDAY NIGHT INTO WEDNESDAY THEN FROM THURSDAY NIGHT INTO SUNDAY AS NUMEROUS WEATHER DISTURBANCES MOVE THROUGH THE PLAINS. FRIDAY AND SATURDAY LOOK TO BE THE MOST ACTIVE. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD PASS ALONG ANY REPORTS OF HAIL DIME SIZE OR LARGER... ANY STRONG WINDS OR FLOODING. MILLER
In the hours before
Special weather statement, Jun 10, 5:38 PM CDT, 5 hours 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 538 PM CDT SUN JUN 10 2012 IAZ055-056-069-102315- SHELBY IA-POTTAWATTAMIE IA-HARRISON IA- 538 PM CDT SUN JUN 10 2012 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL SHELBY... NORTHWESTERN POTTAWATTAMIE AND HARRISON COUNTIES UNTIL 615 PM CDT... AT 537 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR UNDERWOOD...OR 16 MILES NORTHEAST OF OMAHA...MOVING NORTHEAST AT 35 MPH. HAIL UP TO THE SIZE OF NICKELS WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... LOGAN...UNDERWOOD...MINDEN...PERSIA...WOODBINE...NEOLA... PORTSMOUTH AND MCCLELLAND. THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 14 AND 29. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY AFTERNOON FOR SOUTHWESTERN IOWA AND EAST CENTRAL NEBRASKA. LAT...LON 4128 9563 4135 9585 4176 9578 4169 9543 TIME...MOT...LOC 2237Z 194DEG 32KT 4137 9573 KERN
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 8:25 PM CDT | Special Weather Statement | OAX | Johnson, Nemaha | 35 min |
| Jun 10, 11:48 PM CDT | Special Weather Statement | OAX | Gage | 27 min |
| Jun 11, 2:28 AM CDT | Areal Flood Advisory | OAX | Pawnee, Richardson | 2 hr |
| Jun 10, 7:34 PM CDT | Special Weather Statement | OAX | Shelby | 41 min |
| Jun 10, 7:58 PM CDT | Special Weather Statement | OAX | Montgomery | 47 min |
| Jun 10, 9:02 PM CDT | Special Weather Statement | OAX | Montgomery, Page | 43 min |
| Jun 10, 11:31 PM CDT | Special Weather Statement | OAX | Montgomery | 29 min |
Nearby
Special Weather Statements in Nebraska, 2012Special Weather Statements in Iowa, 2012Every special weather statement in 2012
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.