Alert archive / Iowa / Tornado Warnings in 2011
Tornado Warning 21, NWS Omaha, NE
NWS Omaha, NE issued this tornado warning at Jun 19, 2011, 10:12 PM CDT for Fremont County, Page 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 19, 2011, 10:12 PM CDT (03:12 UTC)
- Expired
- Jun 19, 2011, 11:00 PM CDT
- In force
- 48 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
Counties Fremont County, IA, Page County, IA
The radar
The Omaha radar (KOAX), 122 km from the middle of the area, began a volume at 03:16 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 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, 6:51 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 19, 9:49 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.2 hours before the alert went out and 122 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.
005 WFUS53 KOAX 200312 TOROAX IAC071-145-200400- /O.NEW.KOAX.TO.W.0021.110620T0312Z-110620T0400Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1012 PM CDT SUN JUN 19 2011 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN FREMONT COUNTY IN SOUTHWEST IOWA... SOUTHERN PAGE COUNTY IN SOUTHWEST IOWA... * UNTIL 1100 PM CDT * AT 1011 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A CONFIRMED TORNADO 9 MILES SOUTHWEST OF COIN...OR 10 MILES NORTH OF TARKIO. DOPPLER RADAR SHOWED THIS TORNADO MOVING EAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... COIN...NORTHBORO...BLANCHARD...COLLEGE SPRINGS...BRADDYVILLE AND SHAMBAUGH. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4058 9549 4065 9549 4068 9491 4058 9491 TIME...MOT...LOC 0312Z 274DEG 13KT 4059 9538 $$ FOLTZ
3 follow-up statements
331 WWUS53 KOAX 200328 SVSOAX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1028 PM CDT SUN JUN 19 2011 IAC071-200338- /O.CAN.KOAX.TO.W.0021.000000T0000Z-110620T0400Z/ FREMONT IA- 1028 PM CDT SUN JUN 19 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN FREMONT COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4058 9537 4066 9537 4068 9491 4058 9491 TIME...MOT...LOC 0328Z 274DEG 13KT 4059 9530 $$ IAC145-200400- /O.CON.KOAX.TO.W.0021.000000T0000Z-110620T0400Z/ PAGE IA- 1028 PM CDT SUN JUN 19 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN PAGE COUNTY UNTIL 1100 PM CDT... AT 1025 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 6 MILES SOUTHWEST OF COIN...OR 11 MILES NORTH OF TARKIO...MOVING EAST AT 15 MPH. LOCATIONS IMPACTED INCLUDE... COIN...NORTHBORO...COLLEGE SPRINGS AND SHAMBAUGH. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW. TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW. && LAT...LON 4058 9537 4066 9537 4068 9491 4058 9491 TIME...MOT...LOC 0328Z 274DEG 13KT 4059 9530 $$ FOLTZ
535 WWUS53 KOAX 200342 SVSOAX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1042 PM CDT SUN JUN 19 2011 IAC145-200400- /O.CON.KOAX.TO.W.0021.000000T0000Z-110620T0400Z/ PAGE IA- 1042 PM CDT SUN JUN 19 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN PAGE COUNTY UNTIL 1100 PM CDT... AT 1040 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR COIN...OR 13 MILES NORTHEAST OF TARKIO...MOVING EAST AT 15 MPH. LOCATIONS IMPACTED INCLUDE... COIN...BLANCHARD...COLLEGE SPRINGS AND SHAMBAUGH. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW. TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW. && LAT...LON 4058 9533 4066 9534 4068 9491 4058 9491 TIME...MOT...LOC 0342Z 257DEG 13KT 4061 9525 $$ FOLTZ
507 WWUS53 KOAX 200358 SVSOAX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1058 PM CDT SUN JUN 19 2011 IAC145-200407- /O.EXP.KOAX.TO.W.0021.000000T0000Z-110620T0400Z/ PAGE IA- 1058 PM CDT SUN JUN 19 2011 ...THE TORNADO WARNING FOR SOUTHERN PAGE COUNTY WILL EXPIRE AT 1100 PM CDT... ROTATION WITHIN THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER POSES AN IMMEDIATE TORNADO THREAT. HOWEVER LARGE HAIL...GUSTY WINDS AND VERY HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO WATCH REMAINS IN EFFECT UNTIL 4 AM CDT! LAT...LON 4058 9533 4066 9534 4068 9491 4058 9491 TIME...MOT...LOC 0357Z 257DEG 13KT 4062 9518 $$ FOLTZ
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, 10:39 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, 3:27 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 48 min |
| Jun 20, 3:31 PM CDT | Flash Flood Watch | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 7 hr |
Nearby
Tornado Warnings in Iowa, 2011Every tornado warning in 2011Tornadoes 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.