Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 87, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 21, 2014, 4:20 AM CDT for Martin County, Minnesota. It was in force for 40 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 21, 2014, 4:20 AM CDT (09:20 UTC)
- Expired
- Aug 21, 2014, 5:00 AM CDT
- In force
- 40 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Martin County, MN
The radar
The Minneapolis radar (KMPX), 167 km from the middle of the area, began a volume at 09:19 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 21, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 9.3 hours before the alert went out and 165 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
- 397 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1160 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
702
WUUS53 KMPX 210920
SVRMPX
MNC091-211000-
/O.NEW.KMPX.SV.W.0087.140821T0920Z-140821T1000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
420 AM CDT THU AUG 21 2014
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA...
* UNTIL 500 AM CDT
* AT 417 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 13 MILES NORTHWEST OF FAIRMONT TO 13 MILES EAST OF
JACKSON TO 6 MILES EAST OF SUPERIOR...AND MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS...SIDING AND TREES.
* LOCATIONS IMPACTED INCLUDE...
FAIRMONT...WELCOME...CEYLON...WILBERT...FAIRMONT AIRPORT...GRANADA
AND EAST CHAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!
&&
LAT...LON 4349 9485 4351 9487 4370 9478 4371 9425
4349 9425
TIME...MOT...LOC 0920Z 256DEG 36KT 4375 9463 4362 9470
4343 9479
HAIL...1.00IN
WIND...60MPH
$$
JRB2 follow-up statements
748
WWUS53 KMPX 210943
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
443 AM CDT THU AUG 21 2014
MNC091-211000-
/O.CON.KMPX.SV.W.0087.000000T0000Z-140821T1000Z/
MARTIN MN-
443 AM CDT THU AUG 21 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MARTIN COUNTY UNTIL 500 AM CDT...
AT 440 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
NEAR FAIRMONT...AND MOVING EAST AT 40 MPH.
HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS...SIDING AND TREES.
LOCATIONS IMPACTED INCLUDE...
EAST CHAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!
&&
LAT...LON 4349 9425 4349 9473 4370 9460 4371 9425
TIME...MOT...LOC 0943Z 256DEG 36KT 4373 9432 4360 9440
4341 9449
HAIL...1.00IN
WIND...60MPH
$$
JRB607
WWUS53 KMPX 210959
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
459 AM CDT THU AUG 21 2014
MNC091-211009-
/O.EXP.KMPX.SV.W.0087.000000T0000Z-140821T1000Z/
MARTIN MN-
459 AM CDT THU AUG 21 2014
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARTIN COUNTY
WILL EXPIRE AT 500 AM CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 AM CDT.
LAT...LON 4349 9425 4349 9473 4370 9460 4371 9425
TIME...MOT...LOC 0959Z 256DEG 36KT 4375 9410 4362 9418
4344 9427
$$
JRBThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 12:24 AM CDT | Special Weather Statement | MPX | Lac qui Parle | 36 min |
| Aug 21, 12:52 AM CDT | Special Weather Statement | MPX | Stevens | 53 min |
| Aug 21, 2:01 AM CDT | Areal Flood Warning | MPX | Stevens, Swift | 6 hr |
| Aug 21, 2:33 AM CDT | Flash Flood Watch | MPX | Anoka, Blue Earth, Carver, Chippewa, Dakota, Douglas and 21 more | 4 hr |
| Aug 21, 2:50 AM CDT | Special Weather Statement | MPX | Brown, Martin, Watonwan | 85 min |
| Aug 21, 3:07 AM CDT | Special Weather Statement | MPX | Chippewa, Kandiyohi, Pope, Swift | 83 min |
| Aug 21, 3:53 AM CDT | Areal Flood Warning | MPX | Brown, Watonwan | 5 hr |
| Aug 21, 4:31 AM CDT | Special Weather Statement | MPX | Blue Earth, Nicollet | 59 min |
| Aug 21, 4:47 AM CDT | Severe Thunderstorm Warning | MPX | Faribault | 43 min |
| Aug 21, 5:10 AM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Faribault, Waseca | 50 min |
| Aug 21, 7:16 AM CDT | Heat Advisory | MPX | Blue Earth, Brown, Carver, Dakota, Faribault, Freeborn and 14 more | 13 hr |
| Aug 21, 6:20 PM CDT | Special Weather Statement | MPX | Watonwan | 25 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2014Every severe thunderstorm warning in 2014
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.