Alert archive / Michigan / Tornado Warnings in 2011
Tornado Warning 15, NWS Detroit, MI
NWS Detroit, MI issued this tornado warning at Aug 24, 2011, 6:11 PM EDT for Sanilac County, Michigan. It was in force for 34 min. 6 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
- Aug 24, 2011, 6:11 PM EDT (22:11 UTC)
- Expired
- Aug 24, 2011, 6:45 PM EDT
- In force
- 34 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
County Sanilac County, MI
The radar
The Detroit radar (KDTX), 90 km from the middle of the area, began a volume at 22:12 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 |
|---|---|---|---|
| Aug 24, 6:12 PM EDT | TSTM WND DMG | 2 S Lexington, MI | 3 INCH DIAMETER LIMBS DOWN ON M 25. |
| Aug 24, 6:12 PM EDT | HAIL 0.75 | 4 E Croswell, MI | REPORTED BY FIRE DEPARTMENT. |
| Aug 24, 6:12 PM EDT | HAIL 0.75 | 5 Ene Croswell, MI | |
| Aug 24, 6:12 PM EDT | HAIL 0.88 | 5 Ese Croswell, MI | |
| Aug 24, 6:12 PM EDT | HAIL 1 | 4 S Lexington, MI | |
| Aug 24, 6:12 PM EDT | HAIL 1 | Lexington, MI |
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 |
|---|---|---|---|
| Aug 24, 6:00 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 10.2 hours before the alert went out and 86 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
- 223 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 326 m²/s²
- 0-3 km storm-relative helicity
- 408 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
035 WFUS53 KDTX 242211 TORDTX MIC151-242245- /O.NEW.KDTX.TO.W.0015.110824T2211Z-110824T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 611 PM EDT WED AUG 24 2011 THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN SANILAC COUNTY IN SOUTHEAST MICHIGAN... * UNTIL 645 PM EDT * AT 608 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR CROSWELL...AND MOVING EAST AT 50 MPH. * THIS DANGEROUS STORM WILL BE NEAR LEXINGTON AT 615 PM EDT. 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 4316 8273 4332 8274 4339 8253 4317 8250 TIME...MOT...LOC 2210Z 262DEG 42KT 4326 8256 $$ SF/KEC
4 follow-up statements
988 WWUS53 KDTX 242217 SVSDTX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 617 PM EDT WED AUG 24 2011 MIC151-242245- /O.CON.KDTX.TO.W.0015.000000T0000Z-110824T2245Z/ SANILAC MI- 617 PM EDT WED AUG 24 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN SANILAC COUNTY UNTIL 645 PM EDT... AT 612 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR LEXINGTON...MOVING EAST AT 40 MPH. THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF SOUTHEASTERN SANILAC COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4317 8250 4316 8273 4329 8274 4334 8253 TIME...MOT...LOC 2217Z 267DEG 37KT 4325 8248 $$ KEC
763 WWUS53 KDTX 242225 SVSDTX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 625 PM EDT WED AUG 24 2011 MIC151-242245- /O.CON.KDTX.TO.W.0015.000000T0000Z-110824T2245Z/ SANILAC MI- 625 PM EDT WED AUG 24 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN SANILAC COUNTY UNTIL 645 PM EDT... AT 621 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SECOND SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR YALE...MOVING EAST AT 40 MPH. THIS DANGEROUS STORM WILL BE NEAR... AMADOR AROUND 635 PM EDT. BIRCH BEACH AND LEXINGTON HEIGHTS AROUND 645 PM EDT. 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 4317 8250 4316 8273 4322 8273 4328 8252 TIME...MOT...LOC 2224Z 262DEG 21KT 4317 8269 $$ KEC
211 WWUS53 KDTX 242237 SVSDTX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 637 PM EDT WED AUG 24 2011 MIC151-242245- /O.CON.KDTX.TO.W.0015.000000T0000Z-110824T2245Z/ SANILAC MI- 637 PM EDT WED AUG 24 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN SANILAC COUNTY UNTIL 645 PM EDT... AT 633 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 7 MILES NORTHWEST OF LAKEPORT...MOVING EAST AT 35 MPH. THIS DANGEROUS STORM WILL BE NEAR... BIRCH BEACH AND LEXINGTON HEIGHTS AROUND 645 PM EDT. THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS... COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4320 8266 4325 8252 4317 8250 4316 8269 TIME...MOT...LOC 2237Z 261DEG 23KT 4317 8258 $$ KEC
843 WWUS53 KDTX 242245 SVSDTX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 645 PM EDT WED AUG 24 2011 MIC151-242254- /O.EXP.KDTX.TO.W.0015.000000T0000Z-110824T2245Z/ SANILAC MI- 645 PM EDT WED AUG 24 2011 ...THE TORNADO WARNING FOR SOUTHEASTERN SANILAC COUNTY WILL EXPIRE AT 645 PM EDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO WATCH REMAINS IN EFFECT UNTIL 1 AM EDT. LAT...LON 4320 8266 4325 8252 4317 8250 4316 8269 TIME...MOT...LOC 2244Z 259DEG 33KT 4319 8248 $$ KEC
The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 5:43 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair, Sanilac | 47 min |
| Aug 24, 5:46 PM EDT | Special Marine Warning | DTX | 89 min | |
| Aug 24, 7:30 PM EDT | Special Marine Warning | DTX | 78 min | |
| Aug 24, 7:34 PM EDT | Special Marine Warning | DTX | 56 min | |
| Aug 24, 7:36 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Saint Clair | 54 min |
| Aug 24, 7:45 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 60 min |
| Aug 24, 7:56 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw | 79 min |
| Aug 24, 7:59 PM EDT | Special Marine Warning | DTX | 61 min |
Nearby
Tornado Warnings in Michigan, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.