Alert archive / North Dakota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 312, NWS Bismarck, ND

August 11, 2007Logan County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 11, 2007, 4:10 AM CDT for Logan County, North Dakota. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 11, 2007, 4:10 AM CDT (09:10 UTC)
Expired: Aug 11, 2007, 5:15 AM CDT
In force: 65 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

County Logan County, ND

The radar

The Bismarck radar (KBIS), 104 km from the middle of the area, began a volume at 09:10 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, 9.2 hours before the alert went out and 100 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: 1851 J/kg
Mixed-layer CIN: -226 J/kg
Mixed-layer LCL: 1543 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 3:00 PM CDT, 13 hours 10 minutes earlier.

Area forecast discussion, Aug 10, 3:00 PM CDT, 13 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
300 PM CDT FRI AUG 10 2007

.SHORT TERM...TONIGHT THROUGH MONDAY NIGHT
WE ARE STILL EXPECTING MORE SEVERE THUNDERSTORMS TO BREAK OUT...AND
THEN PUSH ACROSS OUR CWA OVERNIGHT...PER SPS DISCUSSION. ATTM PRIME
AREA FOR NEW DEVELOPMENT IS ALONG THE MOISTURE CONVERGENCE LINE FROM
JAMESTOWN TO MOBRIDGE. LATER TONIGHT A MCS MAY COME OUT OF MONTANA
AND ACROSS OUR WESTERN AND CENTRAL COUNTIES. A COOLER...DRY AND
BREEZY POST FRONTAL ENVIRONMENT WILL BE IN PLACE SATURDAY. MAJOR
RIDGING WILL THEN RETURN SUNDAY BRINGING A RETURN TO HOTTER WEATHER.
PRECIPITATION OF ANY SIGNIFICANCE IS NOT EXPECTED THROUGH MONDAY.

.LONG TERM...TUESDAY THROUGH FRIDAY NIGHT
MAJOR RIDGING WEST OF THE STATE WILL PERSIST THROUGH THE LONG TERM
FORECAST PERIOD. TO THE OUR NORTHEAST THE HUDSON BAY LOW WILL
STRENGTHEN ENOUGH TO DEPRESS OUR H5 HEIGHTS FROM WHAT THEY WOULD
NORMALLY BE WITH THE EXPECTED PATTERN. THIS WILL KEEP OUR
TEMPERATURES IN THE NORMAL RANGE. I EXPECT GENERALLY DRY WEATHER
WITH THE NORTHWEST FLOW.

&&

.AVIATION...
SEVERE THUNDERSTORMS WILL BE THE MAJOR AVIATION HAZARD THIS EVENING
AND TONIGHT. LATE TONIGHT SOME IFR CEILINGS MAY ALSO DEVELOP IN THE
WAKE OF THE HEAVIER STORMS.

&&

.FIRE...
WILL ISSUE A FIRE WATCH FOR SLOPE AND BOWMAN COUNTIES FOR SATURDAY
AFTERNOON WHERE AFTERNOON RH WILL BE NEAR 20 PERCENT WITH NORTHWEST
WINDS GUSTING TO 30 MPH. BOWMAN AND SLOPE HAVE THE DRIEST FUELS IN MY
CWA.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
FIRE WEATHER WATCH FOR SATURDAY AFTERNOON FOR NDZ040-043.
&&

RSL

Hazardous weather outlook, Aug 10, 2:39 PM CDT, 13 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BISMARCK ND
239 PM CDT FRI AUG 10 2007

NDZ001>005-009>013-017>023-025-031>037-041-042-044>048-050-051-
111945-
DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD-
MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS-
FOSTER-GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER-
STUTSMAN-HETTINGER-GRANT-ADAMS-SIOUX-EMMONS-LOGAN-LA MOURE-
MCINTOSH-DICKEY-
239 PM CDT FRI AUG 10 2007 /139 PM MDT FRI AUG 10 2007/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH
DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA.

.DAY ONE...THIS AFTERNOON AND TONIGHT
SEVERE THUNDERSTORMS WILL INCREASE IN COVERAGE THIS
AFTERNOON...AND THEN CONTINUE WELL INTO TONIGHT. HIGH WINDS..
HAIL AND TORNADOES ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL BE NEEDED FOR THIS AFTERNOONS AND TONIGHTS SEVERE
THUNDERSTORMS.

NDZ040-043-111945-
SLOPE-BOWMAN-
139 PM MDT FRI AUG 10 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH
DAKOTA.

.DAY ONE...THIS AFTERNOON AND TONIGHT
SEVERE THUNDERSTORMS WILL DEVELOP LATE THIS AFTERNOON...AND THEN
CONTINUE WELL INTO TONIGHT. HIGH WINDS.. HAIL AND TORNADOES ARE
POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
A FIRE WEATHER WATCH IS IN EFFECT FOR SATURDAY AFTERNOON. AFTERNOON
RH IS EXPECTED TO BE NEAR 20 PERCENT WITH NORTHWEST WINDS GUSTING
TO 30 MPH.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL BE NEEDED FOR THIS AFTERNOONS AND TONIGHTS SEVERE
THUNDERSTORMS.

RSL

In the hours before

Local storm report, Aug 11, 2:08 AM CDT, 2 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
208 AM CDT SAT AUG 11 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 AM     HAIL             HEBRON                  46.90N 102.04W
08/11/2007  E0.88 INCH       MORTON             ND   TRAINED SPOTTER

0202 AM     HAIL             BISMARCK                46.81N 100.77W
08/11/2007  E0.88 INCH       BURLEIGH           ND   BROADCAST MEDIA

            KFYR-TV REPORTS DIME SIZE HAIL AS WELL

0205 AM     HAIL             BISMARCK                46.81N 100.77W
08/11/2007  E1.00 INCH       BURLEIGH           ND   LAW ENFORCEMENT

            NICKEL SIZED HAIL AS WELL

&&

VJENSEN

Local storm report, Aug 11, 2:13 AM CDT, 1 hour 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
213 AM CDT SAT AUG 11 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0105 AM     HAIL             5 W NEW SALEM           46.84N 101.52W
08/11/2007  E1.00 INCH       MORTON             ND   BROADCAST MEDIA

&&

VJENSEN

Local storm report, Aug 11, 2:20 AM CDT, 1 hour 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
220 AM CDT SAT AUG 11 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0205 AM     HAIL             HEBRON                  46.90N 102.04W
08/11/2007  E1.00 INCH       MORTON             ND   TRAINED SPOTTER

            REPORTED 50 TO 55 MPH WINDS AS WELL

&&

VJENSEN

Local storm report, Aug 11, 2:47 AM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
247 AM CDT SAT AUG 11 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0240 AM     HAIL             BISMARCK                46.81N 100.77W
08/11/2007  E0.75 INCH       BURLEIGH           ND   OFFICIAL NWS OBS

            MANY PEA SIZE HAIL AND 51 MPH WIND GUSTS AT THE BISMARCK
            NWS AIRPORT. VERY HEAVY RAINFALL AS WELL

&&

VJENSEN

Local storm report, Aug 11, 3:00 AM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
300 AM CDT SAT AUG 11 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0254 AM     HAIL             BISMARCK                46.81N 100.77W
08/11/2007  E1.00 INCH       BURLEIGH           ND   OTHER FEDERAL

            MANY PENNY AND NICKEL SIZED HAIL AS WELL

&&

VJENSEN

Local storm report, Aug 11, 3:43 AM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
343 AM CDT SAT AUG 11 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0338 AM     HAIL             5 S STEELE              46.78N 99.92W
08/11/2007  E0.75 INCH       KIDDER             ND   CO-OP OBSERVER

            PENNY HAIL HAS COVERED THE GROUND. THE GROUND IS WHITE.
            HEAVY RAINS ALONG WITH 50 MPH WINDS.

&&

VJENSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 7:30 PM CDT	Tornado Warning	BIS	Emmons, Sioux	30 min
Aug 10, 7:38 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Stark	52 min
Aug 10, 8:06 PM CDT	Severe Thunderstorm Warning	BIS	Billings, McKenzie	54 min
Aug 10, 8:26 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	30 min
Aug 10, 8:40 PM CDT	Tornado Warning	BIS	Dunn	35 min
Aug 10, 9:50 PM CDT	Severe Thunderstorm Warning	BIS	Williams	40 min
Aug 10, 9:59 PM CDT	Severe Thunderstorm Warning	BIS	Divide, McKenzie, Williams	61 min
Aug 10, 10:17 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Mountrail	22 min
Aug 10, 10:42 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	33 min
Aug 10, 11:05 PM CDT	Tornado Warning	BIS	Burke, Mountrail, Williams	25 min
Aug 10, 11:11 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, McKenzie, Mountrail, Williams	64 min
Aug 11, 12:31 AM CDT	Severe Thunderstorm Warning	BIS	Morton	59 min
Aug 11, 12:59 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, Stark	61 min
Aug 11, 1:02 AM CDT	High Wind Warning	BIS	Bottineau, McHenry, Pierce, Renville, Rolette	3 hr
Aug 11, 1:28 AM CDT	Severe Thunderstorm Warning	BIS	Morton	62 min
Aug 11, 1:47 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	58 min
Aug 11, 2:00 AM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton	60 min
Aug 11, 2:19 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, McIntosh	56 min
Aug 11, 2:44 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	61 min
Aug 11, 3:14 AM CDT	Severe Thunderstorm Warning	BIS	Kidder	61 min
Aug 11, 3:22 AM CDT	Severe Thunderstorm Warning	BIS	Dickey	53 min
Aug 11, 3:25 AM CDT	Tornado Warning	BIS	Kidder	35 min
Aug 11, 3:55 AM CDT	Severe Thunderstorm Warning	BIS	Stutsman	65 min
Aug 11, 4:20 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure	55 min
Aug 11, 4:33 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Stutsman	57 min
Aug 11, 3:57 PM CDT	Fire Weather Watch	BIS	Billings, Bowman, Golden Valley, Slope	13 hr

Nearby

Severe Thunderstorm Warnings in North Dakota, 2007 Every severe thunderstorm 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.