Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 10, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Apr 10, 2011, 8:13 PM EDT for Alcona County, Alpena County, Michigan. It was in force for 32 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
- Apr 10, 2011, 8:13 PM EDT (00:13 UTC)
- Expired
- Apr 10, 2011, 8:45 PM EDT
- In force
- 32 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
Counties Alcona County, MI, Alpena County, MI
The radar
The NCL Michigan radar (KAPX), 107 km from the middle of the area, began a volume at 00:16 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 |
|---|---|---|---|
| Apr 10, 6:20 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Alpena, MI (KAPX), launched 00:00Z, 0.2 hours before the alert went out and 76 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
- 689 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 550 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 289 m²/s²
- 0-3 km storm-relative helicity
- 541 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -0.6
The text
As transmitted, in the capitals the NWS used until 2016.
412
WUUS53 KAPX 110013
SVRAPX
MIC001-007-110045-
/O.NEW.KAPX.SV.W.0010.110411T0013Z-110411T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
813 PM EDT SUN APR 10 2011
THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN ALCONA COUNTY IN NORTHERN LOWER MICHIGAN...
SOUTHEASTERN ALPENA COUNTY IN NORTHERN LOWER MICHIGAN...
* UNTIL 845 PM EDT
* AT 811 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM THE TOWN OF HUBBARD LAKE TO 5
MILES SOUTH OF OSSINEKE TOWNSHIP...AND MOVING EAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
ALPENA...OSSINEKE...SPRUCE...BLACK RIVER AND NEGWEGON STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT MONDAY MORNING FOR
NORTHERN LOWER MICHIGAN.
LAT...LON 4505 8324 4502 8328 4503 8335 4507 8339
4505 8343 4502 8341 4499 8345 4499 8341
4495 8344 4490 8336 4490 8331 4479 8330
4484 8377 4507 8367 4510 8330 4505 8328
4507 8323 4505 8318 4504 8318
TIME...MOT...LOC 0014Z 271DEG 40KT 4492 8348 4483 8364
WIND...HAIL 60MPH 1.75IN
$$1 follow-up statement
122
WWUS34 KAPX 110029
SVSAPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
829 PM EDT SUN APR 10 2011
MIC007-110039-
/O.CAN.KAPX.SV.W.0010.000000T0000Z-110411T0045Z/
ALPENA MI-
829 PM EDT SUN APR 10 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALPENA COUNTY IS
CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 4480 8336 4480 8340 4485 8369 4486 8367
4486 8342 4487 8332 4486 8331 4483 8330
4483 8331 4480 8329 4480 8330 4479 8330
TIME...MOT...LOC 0029Z 271DEG 40KT 4491 8324 4482 8341
WIND...HAIL <50MPH <.50IN
$$
MIC001-110045-
/O.CON.KAPX.SV.W.0010.000000T0000Z-110411T0045Z/
ALCONA MI-
829 PM EDT SUN APR 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
ALCONA COUNTY UNTIL 845 PM EDT...
AT 824 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 5 MILES EAST OF OSSINEKE TO
SPRUCE...MOVING EAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
NEGWEGON STATE PARK AND BLACK RIVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4480 8336 4480 8340 4485 8369 4486 8367
4486 8342 4487 8332 4486 8331 4483 8330
4483 8331 4480 8329 4480 8330 4479 8330
TIME...MOT...LOC 0029Z 271DEG 40KT 4491 8324 4482 8341
WIND...HAIL 60MPH 1.00IN
$$The office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 8:07 PM EDT | Tornado Warning | APX | Alcona | 38 min |
| Apr 10, 8:36 PM EDT | River Flood Warning | APX | Arenac | 35 hr |
| Apr 10, 10:20 PM EDT | Special Marine Warning | APX | 25 min | |
| Apr 10, 11:01 PM EDT | Special Marine Warning | APX | 59 min | |
| Apr 10, 11:57 PM EDT | Severe Thunderstorm Warning | APX | Benzie, Manistee | 34 min |
| Apr 11, 12:00 AM EDT | Special Marine Warning | APX | 15 min | |
| Apr 11, 12:58 AM EDT | Severe Thunderstorm Warning | APX | Crawford, Kalkaska | 47 min |
| Apr 11, 3:03 AM EDT | Gale Warning | APX | 19 hr |
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.