Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 113, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Aug 20, 2011, 3:43 PM EDT for Saint Clair County, Sanilac County, Michigan. It was in force for 24 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
- Aug 20, 2011, 3:43 PM EDT (19:43 UTC)
- Expired
- Aug 20, 2011, 4:07 PM EDT
- In force
- 24 min
- Issued by
- NWS Detroit, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Saint Clair County, MI, Sanilac County, MI
The radar
The Detroit radar (KDTX), 89 km from the middle of the area, began a volume at 19:44 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.
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 20, 1:41 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 7.7 hours before the alert went out and 85 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1765 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
088
WUUS53 KDTX 201943
SVRDTX
MIC147-151-202030-
/O.NEW.KDTX.SV.W.0113.110820T1943Z-110820T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
343 PM EDT SAT AUG 20 2011
THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN ST. CLAIR COUNTY IN SOUTHEAST MICHIGAN...
SOUTHEASTERN SANILAC COUNTY IN SOUTHEAST MICHIGAN...
* UNTIL 430 PM EDT
* AT 340 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM LEXINGTON TO 6 MILES EAST OF
YALE...AND MOVING EAST AT 30 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
LEXINGTON HEIGHTS AND BLAINE AROUND 350 PM EDT.
BIRCH BEACH AROUND 355 PM EDT.
LAKEPORT AROUND 400 PM EDT.
THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
YALE... PORT SANILAC... LEXINGTON...
LAKEPORT... CROSWELL... CARSONVILLE...
APPLEGATE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4305 8289 4343 8273 4344 8253 4322 8252
4320 8250 4313 8248 4313 8246 4307 8244
TIME...MOT...LOC 1943Z 267DEG 26KT 4332 8253 4314 8265
WIND...HAIL 60MPH 1.00IN
$$
KURIMSKI/MM2 follow-up statements
135
WWUS53 KDTX 201955
SVSDTX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
355 PM EDT SAT AUG 20 2011
MIC147-151-202030-
/O.CON.KDTX.SV.W.0113.000000T0000Z-110820T2030Z/
SANILAC MI-ST. CLAIR MI-
355 PM EDT SAT AUG 20 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
ST. CLAIR AND SOUTHEASTERN SANILAC COUNTIES UNTIL 430 PM EDT...
AT 352 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF LEXINGTON TO
LAKEPORT...MOVING EAST AT 30 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
LAKEPORT AROUND 400 PM EDT.
THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
LEXINGTON... LAKEPORT... CROSWELL...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4306 8273 4337 8261 4344 8253 4322 8252
4320 8250 4313 8248 4313 8246 4307 8244
TIME...MOT...LOC 1955Z 267DEG 26KT 4332 8241 4314 8253
WIND...HAIL 60MPH 1.00IN
$$
KURIMSKI/MM600
WWUS53 KDTX 202007
SVSDTX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
407 PM EDT SAT AUG 20 2011
MIC147-151-202017-
/O.CAN.KDTX.SV.W.0113.000000T0000Z-110820T2030Z/
SANILAC MI-ST. CLAIR MI-
407 PM EDT SAT AUG 20 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ST. CLAIR AND
SOUTHEASTERN SANILAC COUNTIES IS CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 4306 8273 4337 8261 4344 8253 4322 8252
4320 8250 4313 8248 4313 8246 4307 8244
TIME...MOT...LOC 2007Z 267DEG 26KT 4332 8229 4314 8241
$$
KURIMSKI/MMThe office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:03 PM EDT | Severe Thunderstorm Warning | DTX | Genesee | 25 min |
| Aug 20, 2:40 PM EDT | Areal Flood Advisory | DTX | Genesee, Lapeer, Sanilac, Tuscola | 4 hr |
| Aug 20, 2:47 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw, Shiawassee | 55 min |
| Aug 20, 3:04 PM EDT | Severe Thunderstorm Warning | DTX | Genesee | 71 min |
| Aug 20, 3:36 PM EDT | Special Marine Warning | DTX | 84 min | |
| Aug 20, 3:50 PM EDT | Severe Thunderstorm Warning | DTX | Livingston, Washtenaw | 70 min |
| Aug 20, 4:05 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 55 min |
| Aug 20, 4:12 PM EDT | Flash Flood Warning | DTX | Sanilac | 3 hr |
| Aug 20, 4:56 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Oakland, Wayne | 47 min |
| Aug 20, 5:00 PM EDT | Special Marine Warning | DTX | 60 min | |
| Aug 20, 5:08 PM EDT | Special Marine Warning | DTX | 52 min | |
| Aug 20, 5:21 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair | 34 min |
| Aug 20, 5:25 PM EDT | Special Marine Warning | DTX | 36 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 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.