Alert archive / North Dakota / Frost Advisories in 2012

Frost Advisory 4, NWS Grand Forks, ND

September 8, 201210 counties in North Dakota

NWS Grand Forks, ND issued this frost advisory at Sep 8, 2012, 8:07 PM CDT for 10 counties in North Dakota. It took effect at Sep 9, 2012, 1:00 AM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Sep 8, 2012, 8:07 PM CDT (01:07 UTC)
In effect from
Sep 9, 2012, 1:00 AM CDT
Expired
Sep 9, 2012, 7:40 AM CDT
In force
7 hr
Issued by
NWS Grand Forks, ND

Counties Barnes County, ND, Benson County, ND, Cavalier County, ND, Eddy County, ND, Griggs County, ND, Nelson County, ND, Ramsey County, ND, Ransom County, ND, Sargent County, ND, Towner County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 85 km from the middle of the area, began a volume at 01:06 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.1 hours before the alert went out and 196 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2012-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2012-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3233 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
51 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.

254 
WWUS73 KFGF 090107
NPWFGF

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GRAND FORKS ND
807 PM CDT SAT SEP 8 2012

...PATCHY FROST EXPECTED TONIGHT IN THE DEVILS LAKE BASIN SOUTH
INTO RANSOM AND SARGENT COUNTIES...

TEMPERATURES ARE EXPECTED TO FALL INTO THE MID 30S OVERNIGHT IN
THE DEVILS LAKE BASIN SOUTH INTO PORTIONS OF SOUTHEAST NORTH
DAKOTA. A VERY DRY AND COOL AIRMASS FOR EARLY SEPTEMBER WILL
SETTLE OVER THE REGION TONIGHT. THE RESULT WILL BE CLEAR
SKIES...LIGHT WINDS AND NEAR RECORD LOWS TONIGHT.

NDZ006-007-014-015-024-026-028-038-049-052-091300-
/O.NEW.KFGF.FR.Y.0004.120909T0600Z-120909T1300Z/
TOWNER-CAVALIER-BENSON-RAMSEY-EDDY-NELSON-GRIGGS-BARNES-RANSOM-
SARGENT-
INCLUDING THE CITIES OF...CANDO...LANGDON...MADDOCK...LEEDS...
DEVILS LAKE...NEW ROCKFORD...LAKOTA...COOPERSTOWN...VALLEY CITY...
LISBON...GWINNER
807 PM CDT SAT SEP 8 2012

...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT SUNDAY...

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 1 AM TO 8 AM CDT SUNDAY. 

* TEMPERATURES WILL FALL INTO THE MID 30S OVERNIGHT IN THE DEVILS
  LAKE BASIN SOUTH INTO RANSOM AND SARGENT COUNTIES. PATCHY FROST
  IS EXPECTED OVERNIGHT THROUGH EARLY SUNDAY MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

DK
2 follow-up statements
845 
WWUS73 KFGF 090804
NPWFGF

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GRAND FORKS ND
304 AM CDT SUN SEP 9 2012

...PATCHY FROST EXPECTED TONIGHT IN THE DEVILS LAKE BASIN SOUTH
INTO RANSOM AND SARGENT COUNTIES...

TEMPERATURES ARE EXPECTED TO FALL INTO THE MID 30S OVERNIGHT IN
THE DEVILS LAKE BASIN SOUTH INTO PORTIONS OF SOUTHEAST NORTH
DAKOTA. A VERY DRY AND COOL AIRMASS FOR EARLY SEPTEMBER WILL
SETTLE OVER THE REGION TONIGHT. THE RESULT WILL BE CLEAR SKIES...
LIGHT WINDS AND NEAR RECORD LOWS TONIGHT.

NDZ006-007-014-015-024-026-028-038-049-052-091300-
/O.CON.KFGF.FR.Y.0004.000000T0000Z-120909T1300Z/
TOWNER-CAVALIER-BENSON-RAMSEY-EDDY-NELSON-GRIGGS-BARNES-RANSOM-
SARGENT-
INCLUDING THE CITIES OF...CANDO...LANGDON...MADDOCK...LEEDS...
DEVILS LAKE...NEW ROCKFORD...LAKOTA...COOPERSTOWN...VALLEY CITY...
LISBON...GWINNER
304 AM CDT SUN SEP 9 2012

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* TEMPERATURES WILL FALL INTO THE LOWER TO MID 30S OVERNIGHT IN THE
  DEVILS LAKE BASIN SOUTH INTO RANSOM AND SARGENT COUNTIES. PATCHY
  FROST IS EXPECTED OVERNIGHT THROUGH EARLY SUNDAY MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

&&

$$

GUST
893 
WWUS73 KFGF 091240
NPWFGF

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GRAND FORKS ND
740 AM CDT SUN SEP 9 2012

...FROST ADVISORY IS CANCELLED...

.MORNING SUNSHINE HAS PUT AN END TO THE RISK OF FROST ACROSS THE
AREA.

NDZ006-007-014-015-024-026-028-038-049-052-091345-
/O.CAN.KFGF.FR.Y.0004.000000T0000Z-120909T1300Z/
TOWNER-CAVALIER-BENSON-RAMSEY-EDDY-NELSON-GRIGGS-BARNES-RANSOM-
SARGENT-
INCLUDING THE CITIES OF...CANDO...LANGDON...MADDOCK...LEEDS...
DEVILS LAKE...NEW ROCKFORD...LAKOTA...COOPERSTOWN...VALLEY CITY...
LISBON...GWINNER
740 AM CDT SUN SEP 9 2012

...FROST ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS CANCELLED THE
FROST ADVISORY. 

MORNING SUNSHINE HAS PUT AN END TO THE RISK OF FROST ACROSS THE
AREA.

$$

GUST

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 9, 6:04 PM CDTFire Weather WatchFGFCass, Ransom, Richland, Sargent9 hr

Nearby

Frost Advisories in North Dakota, 2012Every frost advisory in 2012

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.