Alert archive / Idaho / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 14, NWS Pocatello, ID

July 13, 2001Clark County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Jul 13, 2001, 3:26 PM MDT for Clark County, Idaho. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 13, 2001, 3:26 PM MDT (21:26 UTC)
Expired: Jul 13, 2001, 4:00 PM MDT
In force: 34 min
Issued by: NWS Pocatello, ID
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Clark County, ID

The radar

The Pocatello radar (KSFX), 133 km from the middle of the area, began a volume at 21:29 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

Boise Airport, ID (KBOI), launched 12:00Z, 9.4 hours before the alert went out and 313 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: 2610 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KPIH 132127
SVRPIH

IDC033-132200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
326 PM MDT FRI JUL 13 2001

THE NATIONAL WEATHER SERVICE IN POCATELLO/IDAHO FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLARK COUNTY IN IDAHO

* UNTIL 400 PM MDT

* AT 318 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES WEST OF SMALL...OR ABOUT 16 MILES WEST
  OF DUBOIS...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  4 MILES NORTHWEST OF SPENCER AT 350 PM MDT
  3 MILES SOUTHEAST OF HUMPHREY AT 355 PM MDT

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN POCATELLO/IDAHO FALLS.

LAT...LON 4423 11269 4410 11251 4436 11193 4453 11229

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 Pocatello, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 2:55 PM MDT, 31 minutes earlier.

Area forecast discussion, Jul 13, 2:55 PM MDT, 31 minutes before

SOUTHEAST IDAHO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
235 AM MDT FRI JUL 13 2001

SOUTHWEST FLOW WITH SHORTWAVES AND INSTABILITY STILL CAUSING ISOLATED
THUNDERSTORMS ACROSS CWA. T-STORM NEAR CHUBBUCK HAD SEVERE 3/4 TO 1
INCH HAIL.  EXPECT THESE THUNDERSTORMS THROUGH THE EVENING WITH A FEW
APPROACHING SEVERE LEVELS.

LITTLE CHANGE IN THE BASIC PATTERN THROUGH THE FORECAST PERIOD WITH
TROUGH NEAR THE WEST COAST AND RIDGE TO THE EAST.  WAVE OFF CALIFORNIA
COAST WILL CROSS CWA SATURDAY NIGHT.  ETA HAS PRECIP INCREASING OVER
NIGHT SAT NIGHT.  VARIOUS MOS GUIDANCE ALSO HAS A MAX POP SAT NIGHT
THOUGH MESO ETA FOCUSES PRECIP ABOUT 03Z.  LOW DROPPINuG SOUTH THROUGH
BC WILL INCREASE THE FLOW ALOFT SUNDAY AND MONDAY.
ALDEN

BYI 55/90/54/87 2332

.KSFX WSR-88D...OPERATIONAL...VCP 21.

PIH UU 052/090 056/087 054 09222

.PIH...NONE.

In the hours before

Local storm report, Jul 13, 3:06 PM MDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS
203 PM MDT FRI JUL 13 2001

TIME (MDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

200 PM     CHUBBUCK                  ID   1.00 INCH HAIL
07/13/01   BANNOCK                        REPORTED BY SPOTTER

The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 2:06 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Bingham	24 min
Jul 13, 2:32 PM MDT	Severe Thunderstorm Warning	PIH	Bingham	28 min
Jul 13, 4:40 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Bingham, Power	50 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2001 Every severe thunderstorm warning in 2001

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.