Alert archive / Michigan / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 76, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Aug 20, 2011, 6:02 AM EDT for Crawford County, Kalkaska County, Michigan. It was in force for 43 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, 6:02 AM EDT (10:02 UTC)
- Expired
- Aug 20, 2011, 6:45 AM EDT
- In force
- 43 min
- Issued by
- NWS Gaylord, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Crawford County, MI, Kalkaska County, MI
The radar
The NCL Michigan radar (KAPX), 29 km from the middle of the area, began a volume at 10:06 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 nearest sounding before it
Alpena, MI (KAPX), launched 00:00Z, 10.0 hours before the alert went out and 188 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
- 69 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1772 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
073 WUUS53 KAPX 201002 SVRAPX MIC039-079-201045- /O.NEW.KAPX.SV.W.0076.110820T1002Z-110820T1045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GAYLORD MI 602 AM EDT SAT AUG 20 2011 THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN CRAWFORD COUNTY IN NORTHERN LOWER MICHIGAN... SOUTHEASTERN KALKASKA COUNTY IN NORTHERN LOWER MICHIGAN... * UNTIL 645 AM EDT * AT 556 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SHARON...OR 11 MILES SOUTHEAST OF KALKASKA...AND MOVING EAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... GRAYLING AND SOUTH BRANCH TOWNSHIP. 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. && LAT...LON 4475 8446 4451 8441 4451 8510 4469 8511 TIME...MOT...LOC 1002Z 267DEG 31KT 4461 8497 WIND...HAIL 60MPH 1.00IN $$ JZ
3 follow-up statements
615
WWUS34 KAPX 201018
SVSAPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
618 AM EDT SAT AUG 20 2011
MIC039-079-201045-
/O.CON.KAPX.SV.W.0076.000000T0000Z-110820T1045Z/
CRAWFORD MI-KALKASKA MI-
618 AM EDT SAT AUG 20 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
KALKASKA AND SOUTHERN CRAWFORD COUNTIES UNTIL 645 AM EDT...
AT 616 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED 7 MILES WEST OF GRAYLING...MOVING EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
GRAYLING AND SOUTH BRANCH TOWNSHIP.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4471 8490 4475 8446 4451 8441 4451 8510
4461 8511
TIME...MOT...LOC 1018Z 263DEG 26KT 4462 8483
WIND...HAIL <50MPH 1.00IN
$$
JZ192
WWUS34 KAPX 201028
SVSAPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
628 AM EDT SAT AUG 20 2011
MIC039-079-201045-
/O.CON.KAPX.SV.W.0076.000000T0000Z-110820T1045Z/
CRAWFORD MI-KALKASKA MI-
628 AM EDT SAT AUG 20 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
KALKASKA AND SOUTHERN CRAWFORD COUNTIES UNTIL 645 AM EDT...
AT 625 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG TO SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING
QUARTER SIZE HAIL. ONE STORM WAS LOCATED NEAR GRAYLING...MOVING EAST
AT 30 MPH. OTHER STORMS WERE 6 MILES SOUTHEAST OF SHARON...AND 8
MILES SOUTH OF GRAYLING.
LOCATIONS IMPACTED INCLUDE...
GRAYLING AND SOUTH BRANCH TOWNSHIP.
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.
&&
LAT...LON 4458 8511 4472 8483 4475 8446 4451 8441
4451 8510
TIME...MOT...LOC 1027Z 263DEG 26KT 4463 8474
WIND...HAIL <50MPH 1.00IN
$$
JZ942
WWUS34 KAPX 201047
SVSAPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GAYLORD MI
647 AM EDT SAT AUG 20 2011
MIC039-079-201055-
/O.EXP.KAPX.SV.W.0076.000000T0000Z-110820T1045Z/
CRAWFORD MI-KALKASKA MI-
647 AM EDT SAT AUG 20 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN KALKASKA AND
SOUTHERN CRAWFORD COUNTIES HAS EXPIRED...
THE STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY. HOWEVER...SMALL HAIL...GUSTY WINDS...AND HEAVY RAIN ARE
STILL EXPECTED WITH THESE THUNDERSTORMS OVER SOUTHERN CRAWFORD
COUNTY.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN GAYLORD.
LAT...LON 4458 8511 4472 8483 4475 8446 4451 8441
4451 8510
TIME...MOT...LOC 1028Z 263DEG 26KT 4463 8473
WIND...HAIL <50MPH <.50IN
$$
JZThe office that day
Everything else NWS Gaylord, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 9:37 AM EDT | Special Marine Warning | APX | 38 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.