Alert archive / Iowa / Tornado Warnings in 2012
Tornado Warning 4, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at May 3, 2012, 8:27 PM CDT for 4 counties in Iowa. It was in force for 33 min. 3 reports 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
- May 3, 2012, 8:27 PM CDT (01:27 UTC)
- Expired
- May 3, 2012, 9:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
Counties Henry County, IA, Jefferson County, IA, Louisa County, IA, Washington County, IA
The radar
The Quad Cities radar (KDVN), 96 km from the middle of the area, began a volume at 01:27 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 |
|---|---|---|---|
| May 3, 8:44 PM CDT | TORNADO | Wayland, IA | NEAR 120TH STREET NEAR WAYLAND. |
| May 3, 8:50 PM CDT | TORNADO | 2 Ne Wayland, IA | TORNADO WENT OVER THE RESIDENCE AT 2711 330TH ST ABOUT 2 MILES NORTHEAST OF WAYLAND. TIME ESTIMATED. RELAYED 911 CALL FROM WASHINGTON COUNTY SHERIFF OFFICE. |
| May 3, 8:55 PM CDT | TORNADO | 4 Ne Wayland, IA | HEAVY DAMAGE AT 3229 SPRUCE AVE ABOUT 4 MILES NORTHEAST OF WAYLAND. RELAYED BY SPOTTER. TIME ESTIMATED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 3, 7:09 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 102 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
- 1056 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1420 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
304 WFUS53 KDVN 040127 TORDVN IAC087-101-115-183-040200- /O.NEW.KDVN.TO.W.0004.120504T0127Z-120504T0200Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 827 PM CDT THU MAY 3 2012 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * TORNADO WARNING FOR... NORTHERN HENRY COUNTY IN SOUTHEAST IOWA... NORTHEASTERN JEFFERSON COUNTY IN SOUTHEAST IOWA... WEST CENTRAL LOUISA COUNTY IN SOUTHEAST IOWA... SOUTHEASTERN WASHINGTON COUNTY IN SOUTHEAST IOWA... * UNTIL 900 PM CDT. * AT 822 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO NEAR GERMANVILLE...OR 13 MILES NORTHEAST OF FAIRFIELD... MOVING NORTHEAST AT 25 MPH. * THE TORNADO WILL BE NEAR... WAYLAND AROUND 840 PM CDT... NOBLE AND SWEDESBURG AROUND 845 PM CDT... OLDS AROUND 850 PM CDT... CRAWFORDSVILLE AROUND 855 PM CDT... WYMAN AROUND 900 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FRIDAY MORNING FOR NORTHWESTERN ILLINOIS. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 100 AM CDT FRIDAY MORNING FOR SOUTHEAST IOWA AND NORTHEAST MISSOURI. && LAT...LON 4134 9146 4115 9132 4098 9177 4114 9189 TIME...MOT...LOC 0127Z 241DEG 21KT 4111 9172 $$ LE
2 follow-up statements
906
WWUS53 KDVN 040139
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
839 PM CDT THU MAY 3 2012
IAC087-101-115-183-040200-
/O.CON.KDVN.TO.W.0004.000000T0000Z-120504T0200Z/
WASHINGTON IA-LOUISA IA-JEFFERSON IA-HENRY IA-
839 PM CDT THU MAY 3 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHERN
HENRY...NORTHEASTERN JEFFERSON...WEST CENTRAL LOUISA AND SOUTHEASTERN
WASHINGTON COUNTIES...
AT 835 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR
WAYLAND...OR 13 MILES SOUTH OF WASHINGTON...MOVING NORTHEAST AT 20
MPH.
THE TORNADO WILL BE NEAR...
NOBLE AND SWEDESBURG AROUND 850 PM CDT...
OLDS AROUND 855 PM CDT...
CRAWFORDSVILLE...WYMAN...WINFIELD AND 8 MILES SOUTH OF AINSWORTH
AROUND 900 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FRIDAY MORNING
FOR NORTHWESTERN ILLINOIS. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 100 AM CDT FRIDAY MORNING FOR SOUTHEAST IOWA AND NORTHEAST
MISSOURI.
&&
LAT...LON 4106 9157 4104 9171 4119 9179 4134 9146
4115 9132
TIME...MOT...LOC 0139Z 243DEG 19KT 4113 9166
$$
LE729
WWUS53 KDVN 040148
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
848 PM CDT THU MAY 3 2012
IAC101-040157-
/O.CAN.KDVN.TO.W.0004.000000T0000Z-120504T0200Z/
JEFFERSON IA-
848 PM CDT THU MAY 3 2012
...THE TORNADO WARNING FOR NORTHEASTERN JEFFERSON COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING TORNADO HAS
MOVED OUT OF THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN
CANCELLED.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FRIDAY MORNING
FOR NORTHWESTERN ILLINOIS. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 100 AM CDT FRIDAY MORNING FOR SOUTHEAST IOWA AND NORTHEAST
MISSOURI.
LAT...LON 4106 9157 4110 9168 4122 9172 4134 9146
4115 9132
TIME...MOT...LOC 0147Z 236DEG 17KT 4116 9163
$$
IAC087-115-183-040200-
/O.CON.KDVN.TO.W.0004.000000T0000Z-120504T0200Z/
WASHINGTON IA-LOUISA IA-HENRY IA-
848 PM CDT THU MAY 3 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR NORTHERN
HENRY...WEST CENTRAL LOUISA AND SOUTHEASTERN WASHINGTON COUNTIES...
AT 844 PM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A
TORNADO. TRAINED SPOTTERS REPORTED THE TORNADO NEAR 120TH STREET
SOUTH OF WAYLAND. THIS TORNADO WAS LOCATED APPROXIMATELY NEAR
WAYLAND...OR 10 MILES SOUTH OF WASHINGTON...MOVING NORTHEAST AT 20
MPH.
THE TORNADO WILL BE NEAR...
OLDS AROUND 855 PM CDT...
CRAWFORDSVILLE...WYMAN...AINSWORTH AND 8 MILES NORTHWEST OF
WINFIELD AROUND 900 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE SAFEST PLACE TO BE IN A TORNADO IS IN A BASEMENT OR INTERIOR ROOM
OR HALLWAY ON THE LOWEST FLOOR OF A BUILDING.
TORNADOES AT NIGHT ARE DIFFICULT TO SEE AND ARE ESPECIALLY DANGEROUS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FRIDAY MORNING
FOR NORTHWESTERN ILLINOIS. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 100 AM CDT FRIDAY MORNING FOR SOUTHEAST IOWA AND NORTHEAST
MISSOURI.
&&
LAT...LON 4106 9157 4110 9168 4122 9172 4134 9146
4115 9132
TIME...MOT...LOC 0147Z 236DEG 17KT 4116 9163
$$
LEThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:31 PM CDT | Special Weather Statement | DVN | Benton | 29 min |
| May 3, 8:23 PM CDT | Special Weather Statement | DVN | Louisa, Washington | 52 min |
| May 3, 8:23 PM CDT | Severe Thunderstorm Warning | DVN | Benton | 15 min |
| May 3, 8:40 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Linn | 35 min |
| May 3, 8:58 PM CDT | Tornado Warning | DVN | Henry, Louisa, Muscatine, Washington | 32 min |
| May 3, 9:14 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Scott | 31 min |
| May 3, 9:29 PM CDT | Tornado Warning | DVN | Louisa, Muscatine | 17 min |
| May 3, 9:46 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine, Scott | 43 min |
| May 3, 9:58 PM CDT | Flash Flood Warning | DVN | Keokuk, Louisa, Washington | 6 hr |
| May 3, 10:20 PM CDT | Flash Flood Warning | DVN | Cedar, Johnson, Louisa, Muscatine, Washington | 6 hr |
| May 3, 10:22 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 38 min |
| May 3, 10:44 PM CDT | Flash Flood Warning | DVN | Louisa, Scott | 6 hr |
| May 3, 11:59 PM CDT | Flash Flood Watch | DVN | Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 4 more | 9 hr |
| May 4, 12:06 AM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 24 min |
| May 4, 1:10 AM CDT | Flash Flood Warning | DVN | Henry, Jefferson | 6 hr |
| May 4, 2:26 AM CDT | Special Weather Statement | DVN | Des Moines, Lee, Van Buren | 49 min |
| May 4, 2:40 AM CDT | Flash Flood Warning | DVN | Lee, Van Buren | 6 hr |
| May 4, 3:07 AM CDT | Severe Thunderstorm Warning | DVN | Lee | 38 min |
| May 4, 4:04 AM CDT | Areal Flood Warning | DVN | Louisa, Muscatine, Washington | 9 hr |
| May 4, 6:26 AM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 49 min |
| May 4, 6:34 AM CDT | Flash Flood Warning | DVN | Keokuk | 4 hr |
| May 4, 11:59 AM CDT | River Flood Warning | DVN | Des Moines, Henry, Lee | 71 hr |
| May 4, 3:31 PM CDT | Flash Flood Watch | DVN | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more | 11 hr |
Nearby
Tornado Warnings in Iowa, 2012Every tornado warning in 2012Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.