Alert archive / Iowa / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 162, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jun 20, 2011, 3:27 AM CDT for Harrison County, Shelby County, Iowa. It was in force for 48 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 20, 2011, 3:27 AM CDT (08:27 UTC)
- Expired
- Jun 20, 2011, 4:15 AM CDT
- In force
- 48 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Harrison County, IA, Shelby County, IA
The radar
The Omaha radar (KOAX), 101 km from the middle of the area, began a volume at 08:30 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 19, 9:49 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 8.5 hours before the alert went out and 101 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
- 2452 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1426 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.2
The text
As transmitted, in the capitals the NWS used until 2016.
822
WUUS53 KOAX 200827
SVROAX
IAC085-165-200915-
/O.NEW.KOAX.SV.W.0162.110620T0827Z-110620T0915Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
327 AM CDT MON JUN 20 2011
THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN HARRISON COUNTY IN SOUTHWEST IOWA...
SHELBY COUNTY IN SOUTHWEST IOWA...
* UNTIL 415 AM CDT
* AT 325 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS OF AROUND 60 MPH OR HIGHER. THIS STORM WAS LOCATED
NEAR PERSIA...OR 30 MILES NORTHEAST OF OMAHA...AND MOVING EAST AT
30 MPH.
* LOCATIONS IMPACTED INCLUDE...
SHELBY...EARLING...HARLAN...IRWIN...PORTSMOUTH...PANAMA...
TENNANT...WESTPHALIA...NISHNA BEND RECREATION AREA...KIRKMAN...
PRAIRIE ROSE STATE PARK AND ELK HORN CREEK RECREATION AREA.
THE WARNED AREA INCLUDES HIGHWAY 59 IN IOWA BETWEEN MILE MARKERS 67
AND 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF YOUR
HOME OR BUSINESS. HEAVY RAIN CAN QUICKLY FLOOD ROADS...SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4151 9505 4151 9569 4174 9572 4187 9510
4177 9509 4161 9509 4160 9506
TIME...MOT...LOC 0827Z 260DEG 37KT 4159 9558
WIND...HAIL 60MPH 1.00IN
$$
FOBERT3 follow-up statements
555
WWUS53 KOAX 200838
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
338 AM CDT MON JUN 20 2011
IAC085-200848-
/O.CAN.KOAX.SV.W.0162.000000T0000Z-110620T0915Z/
HARRISON IA-
338 AM CDT MON JUN 20 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HARRISON COUNTY
IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4151 9550 4159 9550 4160 9550 4160 9552
4177 9556 4187 9510 4177 9509 4161 9509
4160 9506 4151 9505
TIME...MOT...LOC 0838Z 260DEG 37KT 4161 9543
$$
IAC165-200915-
/O.CON.KOAX.SV.W.0162.000000T0000Z-110620T0915Z/
SHELBY IA-
338 AM CDT MON JUN 20 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SHELBY COUNTY
UNTIL 415 AM CDT...
AT 335 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED 5 MILES EAST OF PERSIA...OR 37 MILES NORTHEAST OF OMAHA...
MOVING EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
EARLING...HARLAN...IRWIN...ELK HORN...WESTPHALIA...NISHNA BEND
RECREATION AREA...KIRKMAN...PRAIRIE ROSE STATE PARK AND ELK HORN
CREEK RECREATION AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF YOUR
HOME OR BUSINESS. HEAVY RAIN CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF
YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND GLASS DOORS. SEVERE
THUNDERSTORMS CAN PRODUCE LARGE HAIL...DAMAGING WINDS...FREQUENT
LIGHTNING AND VERY HEAVY RAIN.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4151 9550 4159 9550 4160 9550 4160 9552
4177 9556 4187 9510 4177 9509 4161 9509
4160 9506 4151 9505
TIME...MOT...LOC 0838Z 260DEG 37KT 4161 9543
WIND...HAIL 60MPH 1.00IN
$$
FOBERT614
WWUS53 KOAX 200902
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
402 AM CDT MON JUN 20 2011
IAC165-200915-
/O.CON.KOAX.SV.W.0162.000000T0000Z-110620T0915Z/
SHELBY IA-
402 AM CDT MON JUN 20 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN SHELBY
COUNTY UNTIL 415 AM CDT...
AT 358 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR KIMBALLTON...OR 51 MILES NORTHEAST OF OMAHA...MOVING
EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
ELK HORN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF YOUR
HOME OR BUSINESS. HEAVY RAIN CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF
YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND GLASS DOORS. SEVERE
THUNDERSTORMS CAN PRODUCE LARGE HAIL...DAMAGING WINDS...FREQUENT
LIGHTNING AND VERY HEAVY RAIN.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4151 9522 4163 9528 4164 9528 4163 9528
4183 9529 4187 9510 4177 9509 4161 9509
4160 9506 4151 9505
TIME...MOT...LOC 0902Z 260DEG 37KT 4165 9510
WIND...HAIL 60MPH 1.00IN
$$
FOBERT231
WWUS53 KOAX 200910
SVSOAX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
410 AM CDT MON JUN 20 2011
IAC165-200920-
/O.EXP.KOAX.SV.W.0162.000000T0000Z-110620T0915Z/
SHELBY IA-
410 AM CDT MON JUN 20 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SHELBY COUNTY WILL
EXPIRE AT 415 AM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA. HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH
ADDITIONAL THUNDERSTORMS THAT WILL MOVE INTO THE AREA SHORTLY.
LAT...LON 4151 9522 4163 9528 4164 9528 4163 9528
4183 9529 4187 9510 4177 9509 4161 9509
4160 9506 4151 9505
TIME...MOT...LOC 0910Z 260DEG 37KT 4166 9499
$$
FOBERTWhat 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 Jun 20, 2:58 AM CDT, 29 minutes earlier.
Area forecast discussion, Jun 20, 2:58 AM CDT, 29 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 258 AM CDT MON JUN 20 2011 .DISCUSSION... MAIN CONCERN IS THE SHORT TERM SEVERE WEATHER THREAT. THE MAIN UPPER LEVEL SYSTEM PER WATER VAPOR IMAGERY AS OF 07Z WAS LOCATED OVER SRN CO/NRN NM. THIS IS EXPECTED TO TRACK TO THE NORTHEAST INTO THE CENTRAL PLAINS TODAY. AHEAD OF THIS SYSTEM...STRONG WARM AIR ADVECTION INTERACTING WITH SIGNIFICANT MOISTURE NEAR THE 850 MB WARM FRONT WAS PRODUCING A BROAD ZONE OF WARM AIR ADVECTION THUNDERSTORMS OVER NEB/IA PER RADAR MOSAIC. THESE THUNDERSTORMS ARE GENERALLY EXPECTED TO CONTINUE TO TRACK TO THE EAST AND NORTHEAST THROUGH THE REST OF THE MORNING AND ARE LIKELY TO BE MAINLY OUT OF THE FORECAST AREA BY 12Z. OTHERWISE...SURFACE WARM FRONT /CURRENTLY OVER KANSAS/ IS EXPECTED TO TRACK INTO ERN NEB/WRN IA TODAY AS THE SURFACE LOW DEEPENS AND MOVES INTO SOUTH CENTRAL NEB. WITH SIGNIFICANT MOISTURE ALREADY IN PLACE...AND STEEP MID LEVEL LAPSE RATES PROJECTED TO BE OVER THE AREA TODAY...THE ATMOSPHERE IS EXPECTED TO BECOME EXTREMELY UNSTABLE WITH MLCAPE VALUES OF 4000-5000 J/KG. AT THE SAME TIME...MID LEVEL SPEED MAX OF 50-60 KT WILL EMERGE INTO THE WARM SECTOR. THIS SHOULD CREATE EFFECTIVE SHEAR OF 40-50 KT TODAY ACROSS THE FA. THIS WILL SET THE STAGE FOR ANOTHER ROUND OF POTENTIALLY SIGNIFICANT SEVERE WEATHER. THUNDERSTORMS ARE INITIALLY EXPECTED TO DEVELOP JUST TO THE NORTHEAST OF THE SURFACE LOW OVER SOUTH CENTRAL NEB BY MID-LATE AFTERNOON AS THE CAP IS BREACHED. THUNDERSTORMS WILL THEN EXPAND IN COVERAGE TO THE NORTHEAST...AND ALSO DEVELOP SOUTH ALONG THE ADVANCING PAC FRONT/DRYLINE THROUGH THE EVENING. HODOGRAPHS INDICATE DECENT LOW LEVEL TURNING AND SPEED TO THE NORTHEAST OF THE SURFACE LOW BY LATE AFTERNOON FOR A TORNADO THREAT. HODOGRAPHS ARE NOT IDEAL FOR A TORNADO OUTBREAK GIVEN THE BACKED UPPER LEVEL SHEAR WITH THE JET SEGMENT...BUT A COUPLE OF TORNADOES...ESPECIALLY TOWARD EVENING OVER EAST CENTRAL AND SOUTHEAST NEBRASKA TRANSITIONING TO WESTERN IOWA SEEM LIKELY IN SUSTAINED SUPERCELLS. IT APPEARS THE MOST FAVORABLE ORIENTATION AND SHEAR FOR DESCRETE ACTIVITY IS OVER SOUTH-CENTRAL NEB INTO EAST-CENTRAL NEB. ALSO...GIVEN THE MID LEVEL LAPSE RATES OF 8-8.5 C/KM...SOME VERY LARGE HAIL WILL ALSO BE LIKELY. AS FAR AS RAINFALL...WE FEEL GIVEN THE MID LEVEL SPEED MAX THAT STORMS WILL BE MOVING AT A PRETTY DECENT CLIP AND HEAVY RAIN WILL BE LESS OF A THREAT...BUT THIS OF COURSE HAVE TO BE WATCHED CLOSELY. WILL HAVE LIKELY POPS CONTINUE THROUGH THE EVENING BEFORE THE THUNDERSTORMS EXIT THE AREA AFTER 06Z. THE UPPER LEVEL LOW IS THEN EXPECTED TO CLOSE OFF OVER PARTS OF NEB ON MON NIGHT INTO TUE AND SLOWLY MOVE TO THE EAST. GIVEN SOME SUNSHINE ON TUE AND THE VERY COLD MID LEVEL TEMPERATURES...WE MAY SEE ISOLATED HEATING OF THE DAY TYPE THUNDERSTORMS SPRING UP...ESPECIALLY OVER WESTERN IOWA WITH SOME SMALL HAIL POSSIBLE. OTHERWISE SHOWERS ARE EXPECTED TO CONTINUE THROUGH TUE NIGHT AND WED AS THE UPPER LOW REMAINS IN THE AREA. GOING TEMPERATURES SEEMED ON TRACK WITH FEW CHANGES MADE THERE. DRIER WEATHER LOOKS TO MOVE STARTING ON THURSDAY. && .AVIATION... MVFR CIGS ARE LIKELY AT OMA/OFK THROUGH THE MORNING HOURS BEFORE CEILINGS LIFT. CONVECTION WILL ALSO STILL BE POSSIBLE THROUGH 14Z AT OFK/OMA ASSOCIATED WITH THE CURRENT SCATTERED THUNDERSTORM ACTIVITY. AHEAD OF THE DEEPENING SURFACE LOW TODAY...WE SHOULD SEE GUSTY SOUTHEAST WINDS INTO THE AFTERNOON. WILL LIKELY SEE CONVECTION DEVELOP AND MOVE THROUGH ALL 3 TAF SITES BY EVENING AND HAVE INCLUDED A TEMPO GROUND FOR THE MOST LIKELY TIME. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. && BOUSTEAD
Hazardous weather outlook, Jun 19, 5:40 PM CDT, 9 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 540 PM CDT SUN JUN 19 2011 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-201100- ANTELOPE-BOONE-BURT-BUTLER-CASS-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS- FREMONT IA-GAGE-HARRISON IA-JEFFERSON-JOHNSON-KNOX-LANCASTER-MADISON- MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-PIERCE- PLATTE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD- SHELBY IA-STANTON-THURSTON-WASHINGTON-WAYNE- 540 PM CDT SUN JUN 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOST OF EASTERN NEBRASKA AND PARTS OF SOUTHWEST IOWA. .DAY ONE...TONIGHT AND MONDAY THERE IS A MODERATE RISK FOR SEVERE THUNDERSTORMS ACROSS MOST OF THE AREA. THE MAIN THREAT FROM THUNDERSTORMS WILL BE DAMAGING WINDS AND LARGE HAIL. ISOLATED TORNADOES ARE ALSO POSSIBLE...ESPECIALLY FOR PARTS OF SOUTHEAST NEBRASKA PRIOR TO 11 PM. THE SEVERE WEATHER RISK WILL CONTINUE OVERNIGHT. A MOIST AND UNSTABLE AIRMASS HA LIFTED NORTHWARD INTO SOUTHEAST NEBRASKA LATE SUNDAY...NORTH OF A WARM FRONT. STORMS MAY DEVELOP NEAR THE WARM FRONT THIS EVENING...BUT THERE IS A STRONG CAP WHICH WILL TEND TO INHIBIT DEVELOPMENT. IF STORMS CAN BREAK THE CAP... THEY WILL BE CAPABLE OF PRODUCING PRODUCING VERY LARGE HAIL AND POSSIBLY TORNADOES. OTHER THUNDERSTORMS ACROSS PARTS OF WESTERN AND NORTH CENTRAL NEBRASKA WILL DEVELOP EASTWARD TONIGHT. THESE STORMS ARE EXPECTED TO MOVE INTO EASTERN NEBRASKA LATER THIS EVENING AND THROUGH THE OVERNIGHT HOURS. THESE STORMS ARE ALSO LIKELY TO BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS. THE SEVERE WEATHER THREAT SHOULD GENERALLY END LATE TONIGHT AS THE STORMS MOVE OUT OF THE AREA. A MODERATE RISK OF SEVERE STORMS WILL CONTINUE ON MONDAY AS A COMPLEX LOW PRESSURE SYSTEM AND UPPER LEVEL DISTURBANCE MOVE OUT INTO THE CENTRAL PLAINS. SIGNIFICANT SEVERE WEATHER APPEARS POSSIBLE WITH THIS SYSTEM. MODERATE TO MAJOR FLOODING WILL CONTINUE ALONG THE MISSOURI RIVER RESULTING IN NUMEROUS ROADS REMAINING CLOSED NEAR THE RIVER. .DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SUNDAY SEVERE STORMS COULD LINGER INTO MONDAY NIGHT. THERE IS ALSO A CHANCE OF THUNDERSTORMS TUESDAY BUT THESE ARE NOT EXPECTED TO BE SEVERE. THE NEXT CHANCE OF THUNDERSTORMS IS FROM THURSDAY NIGHT INTO SUNDAY. MODERATE TO MAJOR FLOODING WILL CONTINUE ALONG THE MISSOURI RIVER THROUGH THE REMAINDER OF THE SUMMER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING ACROSS PARTS OF THE AREA...MAINLY SOUTHEAST NEBRASKA. SPOTTERS MAY BE NEEDED ON MONDAY AS WELL...IN THE AFTERNOON AND EVENING.
In the hours before
Special weather statement, Jun 20, 1:49 AM CDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 149 AM CDT MON JUN 20 2011 NEZ045-052-200715- DOUGLAS NE-WASHINGTON NE- 149 AM CDT MON JUN 20 2011 ...SPECIAL WEATHER STATEMENT FOR SOUTHEASTERN WASHINGTON AND DOUGLAS COUNTIES UNTIL 215 AM CDT... AT 146 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM NEAR MILLARD...OR 7 MILES WEST OF OMAHA... MOVING NORTHEAST AT 50 MPH. HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... OMAHA... FORT CALHOUN... BENNINGTON... WASHINGTON... DESOTO BEND NATIONAL WILDLIFE REFUGE... MILLER
Local storm report, Jun 20, 1:57 AM CDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
157 AM CDT MON JUN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0154 AM HAIL 3 W PACIFIC JUNCTION 41.02N 95.86W
06/20/2011 E0.75 INCH MILLS IA TRAINED SPOTTER
&&
JBSpecial weather statement, Jun 20, 1:58 AM CDT, 1 hour 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 158 AM CDT MON JUN 20 2011 IAZ069-079-200730- MILLS IA-POTTAWATTAMIE IA- 158 AM CDT MON JUN 20 2011 ...SPECIAL WEATHER STATEMENT FOR NORTHWESTERN MILLS AND SOUTHERN POTTAWATTAMIE COUNTIES UNTIL 230 AM CDT... AT 155 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM NEAR PACIFIC JUNCTION...OR 17 MILES SOUTHEAST OF OMAHA...MOVING NORTHEAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... COUNCIL BLUFFS... TREYNOR... LAKE MANAWA STATE PARK... SILVER CITY... MCCLELLAND... THIS STORM MAY INTENSIFY. MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. MILLER
Local storm report, Jun 20, 2:43 AM CDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
243 AM CDT MON JUN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0235 AM HAIL BELLWOOD 41.34N 97.24W
06/20/2011 E1.75 INCH BUTLER NE FIRE DEPT/RESCUE
STILL A FEW STONES FALLING AT 241 AM.
0230 AM TSTM WND GST BELLWOOD 41.34N 97.24W
06/20/2011 E60 MPH BUTLER NE FIRE DEPT/RESCUE
ESTIMATED WIND GUSTS UP TO 60 MPH.
&&
BMAYESLocal storm report, Jun 20, 3:10 AM CDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
310 AM CDT MON JUN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0308 AM HAIL S LOGAN 41.64N 95.79W
06/20/2011 E1.50 INCH HARRISON IA TRAINED SPOTTER
&&
BMAYESSpecial weather statement, Jun 20, 3:13 AM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 313 AM CDT MON JUN 20 2011 IAZ055-NEZ034-044-045-200900- BURT NE-DODGE NE-HARRISON IA-WASHINGTON NE- 313 AM CDT MON JUN 20 2011 ...SPECIAL WEATHER STATEMENT FOR WASHINGTON...EASTERN DODGE... SOUTHERN BURT AND WESTERN HARRISON COUNTIES UNTIL 400 AM CDT... AT 311 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CRAIG TO NICKERSON TO CEDAR BLUFFS...AND MOVING EAST AT 35 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... CRAIG... NICKERSON... TEKAMAH... FREMONT... ARLINGTON... BLAIR... MONDAMIN... KENNARD... MODALE... PISGAH... MISSOURI VALLEY... FORT CALHOUN... LOGAN... SUMMIT LAKE STATE RECREATION AREA... FREMONT LAKES STATE RECREATION AREA... HERMAN... LITTLE SIOUX... DESOTO BEND NATIONAL WILDLIFE REFUGE... MAGNOLIA... TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. MAYES
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 9:16 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 44 min |
| Jun 19, 9:40 PM CDT | Tornado Warning | OAX | Fremont, Page | 35 min |
| Jun 19, 9:56 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Page | 49 min |
| Jun 19, 10:12 PM CDT | Tornado Warning | OAX | Fremont, Page | 48 min |
| Jun 19, 10:39 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Page | 51 min |
| Jun 19, 10:47 PM CDT | Flash Flood Warning | OAX | Fremont, Page | 6 hr |
| Jun 19, 11:31 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 44 min |
| Jun 20, 1:33 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 42 min |
| Jun 20, 1:52 AM CDT | Severe Thunderstorm Warning | OAX | Harrison | 38 min |
| Jun 20, 2:49 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 41 min |
| Jun 20, 2:59 AM CDT | Severe Thunderstorm Warning | OAX | Harrison | 46 min |
| Jun 20, 3:31 PM CDT | Flash Flood Watch | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 7 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 2011Every severe thunderstorm warning in 2011
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.