Alert archive / Iowa / Tornado Warnings in 2016
Tornado Warning 13, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Sep 21, 2016, 7:43 PM CDT for Bremer County, Butler County, Iowa. It was in force for 47 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 21, 2016, 7:43 PM CDT (00:43 UTC)
- Expired
- Sep 21, 2016, 8:30 PM CDT
- In force
- 47 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Bremer County, IA, Butler County, IA
The radar
The Des Moines radar (KDMX), 152 km from the middle of the area, began a volume at 00:44 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 |
|---|---|---|---|
| Sep 21, 7:49 PM CDT | HAIL 1 | Greene, IA | . |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.7 hours before the alert went out and 222 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
- 560 J/kg
- Mixed-layer CIN
- -186 J/kg
- Mixed-layer LCL
- 1439 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
964
WFUS53 KDMX 220043
TORDMX
IAC017-023-220130-
/O.NEW.KDMX.TO.W.0013.160922T0043Z-160922T0130Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
743 PM CDT WED SEP 21 2016
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN BUTLER COUNTY IN NORTH CENTRAL IOWA...
NORTHWESTERN BREMER COUNTY IN NORTHEASTERN IOWA...
* UNTIL 830 PM CDT.
* AT 743 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED OVER GREENE...OR 10 MILES NORTH OF ALLISON...
MOVING EAST AT 20 MPH.
HAZARD...TORNADO AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR.
TREE DAMAGE IS LIKELY.
* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
NORTHEASTERN BUTLER AND NORTHWESTERN BREMER COUNTIES...INCLUDING
THE FOLLOWING LOCATIONS: PLAINFIELD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.
TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO NOT
WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW!
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
DES MOINES .
&&
LAT...LON 4276 9246 4284 9291 4291 9289 4291 9245
TIME...MOT...LOC 0043Z 286DEG 18KT 4290 9277
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
REV2 follow-up statements
003
WWUS53 KDMX 220117
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
817 PM CDT WED SEP 21 2016
IAC017-023-220130-
/O.CON.KDMX.TO.W.0013.000000T0000Z-160922T0130Z/
BUTLER IA-BREMER IA-
817 PM CDT WED SEP 21 2016
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHEASTERN BUTLER AND NORTHWESTERN BREMER COUNTIES...
AT 817 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR CLARKSVILLE...OR 10 MILES NORTHEAST OF ALLISON...
MOVING EAST AT 20 MPH.
HAZARD...TORNADO AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR. TREE DAMAGE
IS LIKELY.
LOCATIONS IMPACTED INCLUDE...
GREENE AND PLAINFIELD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.
TORNADOES ARE EXTREMELY DIFFICULT TO SEE AND CONFIRM AT NIGHT. DO NOT
WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW!
IF A TORNADO OR OTHER SEVERE WEATHER IS SPOTTED...REPORT IT TO THE
NATIONAL WEATHER SERVICE OR YOUR LOCAL NEAREST LAW ENFORCEMENT AGENCY
WHO WILL SEND YOUR REPORT. THIS ACT MAY SAVE LIVES OF OTHERS IN THE
PATH OF DANGEROUS WEATHER.
&&
LAT...LON 4276 9246 4284 9291 4291 9289 4291 9245
TIME...MOT...LOC 0117Z 273DEG 17KT 4286 9265
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
SKOW140
WWUS53 KDMX 220120
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
820 PM CDT WED SEP 21 2016
IAC017-023-220130-
/O.EXP.KDMX.TO.W.0013.000000T0000Z-160922T0130Z/
BUTLER IA-BREMER IA-
820 PM CDT WED SEP 21 2016
...THE TORNADO WARNING FOR NORTHEASTERN BUTLER AND NORTHWESTERN
BREMER COUNTIES WILL EXPIRE AT 830 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER SMALL
HAIL...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.
LAT...LON 4276 9246 4284 9291 4291 9289 4291 9245
TIME...MOT...LOC 0120Z 286DEG 18KT 4286 9264
$$
SKOWThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 7:05 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 55 min |
| Sep 21, 7:16 PM CDT | Tornado Warning | DMX | Cerro Gordo | 13 min |
| Sep 21, 8:26 PM CDT | Special Weather Statement | DMX | Bremer | 64 min |
| Sep 21, 8:54 PM CDT | Flash Flood Warning | DMX | Bremer | 6 hr |
| Sep 21, 9:05 PM CDT | Special Weather Statement | DMX | Bremer | 40 min |
| Sep 21, 9:39 PM CDT | River Flood Warning | DMX | Black Hawk, Bremer, Butler | 5 days |
| Sep 21, 9:40 PM CDT | River Flood Warning | DMX | Black Hawk | 8 days |
| Sep 21, 9:41 PM CDT | River Flood Warning | DMX | Black Hawk, Bremer, Butler | 6 days |
| Sep 21, 9:50 PM CDT | River Flood Warning | DMX | Cerro Gordo, Floyd, Worth | 4 days |
| Sep 21, 10:51 PM CDT | Areal Flood Warning | DMX | Cerro Gordo, Franklin, Worth | 48 hr |
| Sep 22, 3:05 AM CDT | Areal Flood Warning | DMX | Bremer | 24 hr |
| Sep 22, 4:13 AM CDT | Flash Flood Warning | DMX | Cerro Gordo, Hancock | 6 hr |
| Sep 22, 7:00 AM CDT | Flash Flood Warning | DMX | Butler | 4 hr |
| Sep 22, 10:22 AM CDT | River Flood Warning | DMX | Wright | 6 days |
| Sep 22, 11:23 AM CDT | Areal Flood Warning | DMX | Bremer, Butler | 24 hr |
Nearby
Tornado Warnings in Iowa, 2016Every tornado warning in 2016Tornadoes in 2016
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.