Alert archive / Minnesota / Red Flag Warnings in 2007

Red Flag Warning 2, NWS Grand Forks, ND

May 17, 200712 counties in Minnesota

NWS Grand Forks, ND issued this red flag warning at May 17, 2007, 10:18 AM CDT for 12 counties in Minnesota. It took effect at May 17, 2007, 12:00 PM CDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 17, 2007, 10:18 AM CDT (15:18 UTC)
In effect from: May 17, 2007, 12:00 PM CDT
Expired: May 17, 2007, 9:00 PM CDT
In force: 9 hr
Issued by: NWS Grand Forks, ND

Counties Becker County, MN, Beltrami County, MN, Clearwater County, MN, Hubbard County, MN, Kittson County, MN, Mahnomen County, MN, Marshall County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Wadena County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 120 km from the middle of the area, began a volume at 15:17 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

International Fa, MN (KINL), launched 12:00Z, 3.3 hours before the alert went out and 204 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1404 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS83 KFGF 171518
RFWFGF

RED FLAG WARNING
NATIONAL WEATHER SERVICE GRAND FORKS ND
1018 AM CDT THU MAY 17 2007

...VERY DRY AND WINDY CONDITIONS INCREASE FIRE RISK...

.A HIGH PRESSURE SYSTEM WILL MOVE OUT OF THE REGION CAUSING RETURN
FLOW WINDS FROM THE SOUTHWEST TO INCREASE THIS AFTERNOON. THIS
COMBINED WITH RELATIVE HUMIDITIES IN THE MID TWENTIES AS WELL AS
CONTINUALLY DRYING FUELS WILL CREATE CRITICAL FIRE CONDITIONS.

MNZ004-005-008-009-013>017-022>024-027-028-032-172330-
/O.NEW.KFGF.FW.W.0002.070517T1700Z-070518T0200Z/
KITTSON-ROSEAU-EAST MARSHALL-NORTH BELTRAMI-PENNINGTON-RED LAKE-
EAST POLK-NORTH CLEARWATER-SOUTH BELTRAMI-MAHNOMEN-
SOUTH CLEARWATER-HUBBARD-WEST BECKER-EAST BECKER-WADENA-
1018 AM CDT THU MAY 17 2007

...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 9 PM CDT THIS EVENING. 

SOUTH WINDS BETWEEN 20 AND 30 MPH WILL COMBINE WITH HUMIDITIES
BELOW 30 PERCENT TO CREATE CRITICAL FIRE WEATHER CONDITIONS. THERE
ARE PLENTIFUL DRY FUELS THEREFORE THESE CONDITIONS WILL PERSIST
THROUGH THE EVENING.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

$$
KK/WB

1 follow-up statement

000 
WWUS83 KFGF 180137
RFWFGF

RED FLAG WARNING
NATIONAL WEATHER SERVICE GRAND FORKS ND
837 PM CDT THU MAY 17 2007

...WINDS SUBSIDING AND HUMIDITY LEVELS CONTINUE TO RISE THIS EVENING...

.SOUTHERLY WINDS WILL CONTINUE TO SUBSIDE...AND HUMIDITY LEVELS
WILL RISE THIS EVENING. THIS WILL BRING AN END TO THE CRITICAL
FIRE WEATHER CONDITIONS THAT PERSISTED THIS AFTERNOON.

MNZ004-005-008-009-013>017-022>024-027-028-032-180245-
/O.EXP.KFGF.FW.W.0002.000000T0000Z-070518T0200Z/
KITTSON-ROSEAU-EAST MARSHALL-NORTH BELTRAMI-PENNINGTON-RED LAKE-
EAST POLK-NORTH CLEARWATER-SOUTH BELTRAMI-MAHNOMEN-
SOUTH CLEARWATER-HUBBARD-WEST BECKER-EAST BECKER-WADENA-
837 PM CDT THU MAY 17 2007

...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING...

THE RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING. 

SOUTHERLY WINDS CONTINUE WILL SUBSIDE INTO THE 10 TO 20 MPH RANGE
BY 9 PM. THIS COUPLED WITH INCREASING HUMIDITY LEVELS WILL BRING
AN END TO THE CRITICAL FIRE WEATHER CONDITIONS AFTER 9 PM.
CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE ONCE AGAIN ON FRIDAY
AHEAD OF A COLD FRONT.

$$
DK

Nearby

Red Flag Warnings in Minnesota, 2007 Every red flag warning in 2007

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.